@tanstack/pacer - npm Package Compare versions

Comparing version 0.10.0 to 0.11.0

dist/cjs/async-debouncer.cjs

@@ -105,2 +105,3 @@ "use strict";
           isPending: false,
+          lastArgs: void 0,
           settleCount: this.store.state.settleCount + 1
@@ -107,0 +108,0 @@ });

dist/cjs/async-debouncer.cjs.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"async-debouncer.cjs","sources":["../../src/async-debouncer.ts"],"sourcesContent":["import { Store } from '@tanstack/store'\nimport { parseFunctionOrValue } from './utils'\nimport type { AnyAsyncFunction, OptionalKeys } from './types'\n\nexport interface AsyncDebouncerState<TFn extends AnyAsyncFunction> {\n  /**\n   * Whether the debouncer can execute on the leading edge of the timeout\n   */\n  canLeadingExecute: boolean\n  /**\n   * Number of function executions that have resulted in errors\n   */\n  errorCount: number\n  /**\n   * Whether the debounced function is currently executing asynchronously\n   */\n  isExecuting: boolean\n  /**\n   * Whether the debouncer is waiting for the timeout to trigger execution\n   */\n  isPending: boolean\n  /**\n   * The arguments from the most recent call to maybeExecute\n   */\n  lastArgs: Parameters<TFn> | undefined\n  /**\n   * The result from the most recent successful function execution\n   */\n  lastResult: ReturnType<TFn> | undefined\n  /**\n   * Number of function executions that have completed (either successfully or with errors)\n   */\n  settleCount: number\n  /**\n   * Current execution status - 'idle' when not active, 'pending' when waiting, 'executing' when running, 'settled' when completed\n   */\n  status: 'disabled' | 'idle' | 'pending' | 'executing' | 'settled'\n  /**\n   * Number of function executions that have completed successfully\n   */\n  successCount: number\n}\n\nfunction getDefaultAsyncDebouncerState<\n  TFn extends AnyAsyncFunction,\n>(): AsyncDebouncerState<TFn> {\n  return structuredClone({\n    canLeadingExecute: true,\n    errorCount: 0,\n    isExecuting: false,\n    isPending: false,\n    lastArgs: undefined,\n    lastResult: undefined,\n    settleCount: 0,\n    successCount: 0,\n    status: 'idle',\n  })\n}\n\n/**\n * Options for configuring an async debounced function\n */\nexport interface AsyncDebouncerOptions<TFn extends AnyAsyncFunction> {\n  /**\n   * Whether the debouncer is enabled. When disabled, maybeExecute will not trigger any executions.\n   * Can be a boolean or a function that returns a boolean.\n   * Defaults to true.\n   */\n  enabled?: boolean | ((debouncer: AsyncDebouncer<TFn>) => boolean)\n  /**\n   * Initial state for the async debouncer\n   */\n  initialState?: Partial<AsyncDebouncerState<TFn>>\n  /**\n   * Whether to execute on the leading edge of the timeout.\n   * Defaults to false.\n   */\n  leading?: boolean\n  /**\n   * Optional error handler for when the debounced function throws.\n   * If provided, the handler will be called with the error and debouncer instance.\n   * This can be used alongside throwOnError - the handler will be called before any error is thrown.\n   */\n  onError?: (error: unknown, debouncer: AsyncDebouncer<TFn>) => void\n  /**\n   * Optional callback to call when the debounced function is executed\n   */\n  onSettled?: (debouncer: AsyncDebouncer<TFn>) => void\n  /**\n   * Optional callback to call when the debounced function is executed\n   */\n  onSuccess?: (result: ReturnType<TFn>, debouncer: AsyncDebouncer<TFn>) => void\n  /**\n   * Whether to throw errors when they occur.\n   * Defaults to true if no onError handler is provided, false if an onError handler is provided.\n   * Can be explicitly set to override these defaults.\n   */\n  throwOnError?: boolean\n  /**\n   * Whether to execute on the trailing edge of the timeout.\n   * Defaults to true.\n   */\n  trailing?: boolean\n  /**\n   * Delay in milliseconds to wait after the last call before executing.\n   * Can be a number or a function that returns a number.\n   * Defaults to 0ms\n   */\n  wait: number | ((debouncer: AsyncDebouncer<TFn>) => number)\n}\n\ntype AsyncDebouncerOptionsWithOptionalCallbacks = OptionalKeys<\n  AsyncDebouncerOptions<any>,\n  'initialState' | 'onError' | 'onSettled' | 'onSuccess'\n>\n\nconst defaultOptions: AsyncDebouncerOptionsWithOptionalCallbacks = {\n  enabled: true,\n  leading: false,\n  trailing: true,\n  wait: 0,\n}\n\n/**\n * A class that creates an async debounced function.\n *\n * Debouncing ensures that a function is only executed after a specified delay has passed since its last invocation.\n * Each new invocation resets the delay timer. This is useful for handling frequent events like window resizing\n * or input changes where you only want to execute the handler after the events have stopped occurring.\n *\n * Unlike throttling which allows execution at regular intervals, debouncing prevents any execution until\n * the function stops being called for the specified delay period.\n *\n * Unlike the non-async Debouncer, this async version supports returning values from the debounced function,\n * making it ideal for API calls and other async operations where you want the result of the `maybeExecute` call\n * instead of setting the result on a state variable from within the debounced function.\n *\n * Error Handling:\n * - If an `onError` handler is provided, it will be called with the error and debouncer instance\n * - If `throwOnError` is true (default when no onError handler is provided), the error will be thrown\n * - If `throwOnError` is false (default when onError handler is provided), the error will be swallowed\n * - Both onError and throwOnError can be used together - the handler will be called before any error is thrown\n * - The error state can be checked using the underlying store\n *\n * State Management:\n * - The debouncer uses a reactive store for state management\n * - Use `initialState` to provide initial state values when creating the async debouncer\n * - The state includes canLeadingExecute, error count, execution status, and success/settle counts\n * - State can be accessed via the `store` property and its `state` getter\n * - The store is reactive and will notify subscribers of state changes\n *\n * @example\n * ```ts\n * const asyncDebouncer = new AsyncDebouncer(async (value: string) => {\n *   const results = await searchAPI(value);\n *   return results; // Return value is preserved\n * }, {\n *   wait: 500,\n *   onError: (error) => {\n *     console.error('Search failed:', error);\n *   }\n * });\n *\n * // Called on each keystroke but only executes after 500ms of no typing\n * // Returns the API response directly\n * const results = await asyncDebouncer.maybeExecute(inputElement.value);\n * ```\n */\nexport class AsyncDebouncer<TFn extends AnyAsyncFunction> {\n  readonly store: Store<Readonly<AsyncDebouncerState<TFn>>> = new Store<\n    AsyncDebouncerState<TFn>\n  >(getDefaultAsyncDebouncerState<TFn>())\n  options: AsyncDebouncerOptions<TFn>\n  #abortController: AbortController | null = null\n  #timeoutId: NodeJS.Timeout | null = null\n  #resolvePreviousPromise:\n    | ((value?: ReturnType<TFn> | undefined) => void)\n    | null = null\n  #rejectPreviousPromise: ((reason?: unknown) => void) | null = null\n\n  constructor(\n    private fn: TFn,\n    initialOptions: AsyncDebouncerOptions<TFn>,\n  ) {\n    this.options = {\n      ...defaultOptions,\n      ...initialOptions,\n      throwOnError: initialOptions.throwOnError ?? !initialOptions.onError,\n    }\n    this.#setState(this.options.initialState ?? {})\n  }\n\n  /**\n   * Updates the async debouncer options\n   */\n  setOptions = (newOptions: Partial<AsyncDebouncerOptions<TFn>>): void => {\n    this.options = { ...this.options, ...newOptions }\n\n    // Cancel pending execution if the debouncer is disabled\n    if (!this.#getEnabled()) {\n      this.cancel()\n    }\n  }\n\n  #setState = (newState: Partial<AsyncDebouncerState<TFn>>): void => {\n    this.store.setState((state) => {\n      const combinedState = {\n        ...state,\n        ...newState,\n      }\n      const { isPending, isExecuting, settleCount } = combinedState\n      return {\n        ...combinedState,\n        status: !this.#getEnabled()\n          ? 'disabled'\n          : isPending\n            ? 'pending'\n            : isExecuting\n              ? 'executing'\n              : settleCount > 0\n                ? 'settled'\n                : 'idle',\n      }\n    })\n  }\n\n  /**\n   * Returns the current debouncer enabled state\n   */\n  #getEnabled = (): boolean => {\n    return !!parseFunctionOrValue(this.options.enabled, this)\n  }\n\n  /**\n   * Returns the current debouncer wait state\n   */\n  #getWait = (): number => {\n    return parseFunctionOrValue(this.options.wait, this)\n  }\n\n  /**\n   * Attempts to execute the debounced function.\n   * If a call is already in progress, it will be queued.\n   *\n   * Error Handling:\n   * - If the debounced function throws and no `onError` handler is configured,\n   *   the error will be thrown from this method.\n   * - If an `onError` handler is configured, errors will be caught and passed to the handler,\n   *   and this method will return undefined.\n   * - The error state can be checked using `getErrorCount()` and `getIsExecuting()`.\n   *\n   * @returns A promise that resolves with the function's return value, or undefined if an error occurred and was handled by onError\n   * @throws The error from the debounced function if no onError handler is configured\n   */\n  maybeExecute = async (\n    ...args: Parameters<TFn>\n  ): Promise<ReturnType<TFn> | undefined> => {\n    if (!this.#getEnabled()) return undefined\n    this.#cancelPendingExecution()\n    this.#setState({ lastArgs: args })\n\n    // Handle leading execution\n    if (this.options.leading && this.store.state.canLeadingExecute) {\n      this.#setState({ canLeadingExecute: false })\n      await this.#execute(...args)\n      return this.store.state.lastResult\n    }\n\n    // Handle trailing execution\n    if (this.options.trailing && this.#getEnabled()) {\n      this.#setState({ isPending: true })\n    }\n\n    return new Promise((resolve, reject) => {\n      this.#resolvePreviousPromise = resolve\n      this.#rejectPreviousPromise = reject\n      this.#timeoutId = setTimeout(async () => {\n        // Execute trailing if enabled\n        if (this.options.trailing && this.store.state.lastArgs) {\n          await this.#execute(...this.store.state.lastArgs)\n        }\n\n        // Reset state and resolve\n        this.#setState({ canLeadingExecute: true })\n        this.#resolvePreviousPromise = null\n        resolve(this.store.state.lastResult)\n      }, this.#getWait())\n    })\n  }\n\n  #execute = async (\n    ...args: Parameters<TFn>\n  ): Promise<ReturnType<TFn> | undefined> => {\n    if (!this.#getEnabled()) return undefined\n    this.#abortController = new AbortController()\n    try {\n      this.#setState({ isExecuting: true })\n      const result = await this.fn(...args) // EXECUTE!\n      this.#setState({\n        lastResult: result,\n        successCount: this.store.state.successCount + 1,\n      })\n      this.options.onSuccess?.(result, this)\n    } catch (error) {\n      this.#setState({\n        errorCount: this.store.state.errorCount + 1,\n      })\n      this.options.onError?.(error, this)\n      if (this.options.throwOnError) {\n        this.#rejectPreviousPromiseInternal(error)\n      }\n    } finally {\n      this.#setState({\n        isExecuting: false,\n        isPending: false,\n        settleCount: this.store.state.settleCount + 1,\n      })\n      this.#abortController = null\n      this.options.onSettled?.(this)\n    }\n    return this.store.state.lastResult\n  }\n\n  /**\n   * Processes the current pending execution immediately\n   */\n  flush = async (): Promise<ReturnType<TFn> | undefined> => {\n    if (this.store.state.isPending && this.store.state.lastArgs) {\n      this.#abortExecution() // abort any current execution\n      this.#clearTimeout() // clear any existing timeout\n      const result = await this.#execute(...this.store.state.lastArgs)\n\n      // Resolve any pending promise from maybeExecute\n      this.#resolvePreviousPromiseInternal()\n\n      return result\n    }\n    return undefined\n  }\n\n  #resolvePreviousPromiseInternal = (): void => {\n    if (this.#resolvePreviousPromise) {\n      this.#resolvePreviousPromise(this.store.state.lastResult)\n      this.#resolvePreviousPromise = null\n    }\n  }\n\n  #rejectPreviousPromiseInternal = (error: unknown): void => {\n    if (this.#rejectPreviousPromise) {\n      this.#rejectPreviousPromise(error)\n      this.#rejectPreviousPromise = null\n    }\n  }\n\n  #clearTimeout = (): void => {\n    if (this.#timeoutId) {\n      clearTimeout(this.#timeoutId)\n      this.#timeoutId = null\n    }\n  }\n\n  #cancelPendingExecution = (): void => {\n    this.#clearTimeout()\n    this.#resolvePreviousPromiseInternal()\n    this.#setState({\n      isPending: false,\n      isExecuting: false,\n      lastArgs: undefined,\n    })\n  }\n\n  #abortExecution = (): void => {\n    if (this.#abortController) {\n      this.#abortController.abort()\n      this.#abortController = null\n    }\n  }\n\n  /**\n   * Cancels any pending execution or aborts any execution in progress\n   */\n  cancel = (): void => {\n    this.#cancelPendingExecution()\n    this.#abortExecution()\n    this.#setState({ canLeadingExecute: true })\n  }\n\n  /**\n   * Resets the debouncer state to its default values\n   */\n  reset = (): void => {\n    this.#setState(getDefaultAsyncDebouncerState<TFn>())\n  }\n}\n\n/**\n * Creates an async debounced function that delays execution until after a specified wait time.\n * The debounced function will only execute once the wait period has elapsed without any new calls.\n * If called again during the wait period, the timer resets and a new wait period begins.\n *\n * Unlike the non-async Debouncer, this async version supports returning values from the debounced function,\n * making it ideal for API calls and other async operations where you want the result of the `maybeExecute` call\n * instead of setting the result on a state variable from within the debounced function.\n *\n * Error Handling:\n * - If an `onError` handler is provided, it will be called with the error and debouncer instance\n * - If `throwOnError` is true (default when no onError handler is provided), the error will be thrown\n * - If `throwOnError` is false (default when onError handler is provided), the error will be swallowed\n * - The error state can be checked using the underlying AsyncDebouncer instance\n * - Both onError and throwOnError can be used together - the handler will be called before any error is thrown\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the async debouncer\n * - Use `onSuccess` callback to react to successful function execution and implement custom logic\n * - Use `onError` callback to react to function execution errors and implement custom error handling\n * - Use `onSettled` callback to react to function execution completion (success or error) and implement custom logic\n * - The state includes canLeadingExecute, error count, execution status, and success/settle counts\n * - State can be accessed via `asyncDebouncer.store.state` when using the class directly\n * - When using framework adapters (React/Solid), state is accessed from `asyncDebouncer.state`\n *\n * @example\n * ```ts\n * const debounced = asyncDebounce(async (value: string) => {\n *   const result = await saveToAPI(value);\n *   return result; // Return value is preserved\n * }, {\n *   wait: 1000,\n *   onError: (error) => {\n *     console.error('API call failed:', error);\n *   },\n *   throwOnError: true // Will both log the error and throw it\n * });\n *\n * // Will only execute once, 1 second after the last call\n * // Returns the API response directly\n * const result = await debounced(\"third\");\n * ```\n */\nexport function asyncDebounce<TFn extends AnyAsyncFunction>(\n  fn: TFn,\n  initialOptions: AsyncDebouncerOptions<TFn>,\n) {\n  const asyncDebouncer = new AsyncDebouncer(fn, initialOptions)\n  return 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+{"version":3,"file":"async-debouncer.cjs","sources":["../../src/async-debouncer.ts"],"sourcesContent":["import { Store } from '@tanstack/store'\nimport { parseFunctionOrValue } from './utils'\nimport type { AnyAsyncFunction, OptionalKeys } from './types'\n\nexport interface AsyncDebouncerState<TFn extends AnyAsyncFunction> {\n  /**\n   * Whether the debouncer can execute on the leading edge of the timeout\n   */\n  canLeadingExecute: boolean\n  /**\n   * Number of function executions that have resulted in errors\n   */\n  errorCount: number\n  /**\n   * Whether the debounced function is currently executing asynchronously\n   */\n  isExecuting: boolean\n  /**\n   * Whether the debouncer is waiting for the timeout to trigger execution\n   */\n  isPending: boolean\n  /**\n   * The arguments from the most recent call to maybeExecute\n   */\n  lastArgs: Parameters<TFn> | undefined\n  /**\n   * The result from the most recent successful function execution\n   */\n  lastResult: ReturnType<TFn> | undefined\n  /**\n   * Number of function executions that have completed (either successfully or with errors)\n   */\n  settleCount: number\n  /**\n   * Current execution status - 'idle' when not active, 'pending' when waiting, 'executing' when running, 'settled' when completed\n   */\n  status: 'disabled' | 'idle' | 'pending' | 'executing' | 'settled'\n  /**\n   * Number of function executions that have completed successfully\n   */\n  successCount: number\n}\n\nfunction getDefaultAsyncDebouncerState<\n  TFn extends AnyAsyncFunction,\n>(): AsyncDebouncerState<TFn> {\n  return structuredClone({\n    canLeadingExecute: true,\n    errorCount: 0,\n    isExecuting: false,\n    isPending: false,\n    lastArgs: undefined,\n    lastResult: undefined,\n    settleCount: 0,\n    successCount: 0,\n    status: 'idle',\n  })\n}\n\n/**\n * Options for configuring an async debounced function\n */\nexport interface AsyncDebouncerOptions<TFn extends AnyAsyncFunction> {\n  /**\n   * Whether the debouncer is enabled. When disabled, maybeExecute will not trigger any executions.\n   * Can be a boolean or a function that returns a boolean.\n   * Defaults to true.\n   */\n  enabled?: boolean | ((debouncer: AsyncDebouncer<TFn>) => boolean)\n  /**\n   * Initial state for the async debouncer\n   */\n  initialState?: Partial<AsyncDebouncerState<TFn>>\n  /**\n   * Whether to execute on the leading edge of the timeout.\n   * Defaults to false.\n   */\n  leading?: boolean\n  /**\n   * Optional error handler for when the debounced function throws.\n   * If provided, the handler will be called with the error and debouncer instance.\n   * This can be used alongside throwOnError - the handler will be called before any error is thrown.\n   */\n  onError?: (error: unknown, debouncer: AsyncDebouncer<TFn>) => void\n  /**\n   * Optional callback to call when the debounced function is executed\n   */\n  onSettled?: (debouncer: AsyncDebouncer<TFn>) => void\n  /**\n   * Optional callback to call when the debounced function is executed\n   */\n  onSuccess?: (result: ReturnType<TFn>, debouncer: AsyncDebouncer<TFn>) => void\n  /**\n   * Whether to throw errors when they occur.\n   * Defaults to true if no onError handler is provided, false if an onError handler is provided.\n   * Can be explicitly set to override these defaults.\n   */\n  throwOnError?: boolean\n  /**\n   * Whether to execute on the trailing edge of the timeout.\n   * Defaults to true.\n   */\n  trailing?: boolean\n  /**\n   * Delay in milliseconds to wait after the last call before executing.\n   * Can be a number or a function that returns a number.\n   * Defaults to 0ms\n   */\n  wait: number | ((debouncer: AsyncDebouncer<TFn>) => number)\n}\n\ntype AsyncDebouncerOptionsWithOptionalCallbacks = OptionalKeys<\n  AsyncDebouncerOptions<any>,\n  'initialState' | 'onError' | 'onSettled' | 'onSuccess'\n>\n\nconst defaultOptions: AsyncDebouncerOptionsWithOptionalCallbacks = {\n  enabled: true,\n  leading: false,\n  trailing: true,\n  wait: 0,\n}\n\n/**\n * A class that creates an async debounced function.\n *\n * Debouncing ensures that a function is only executed after a specified delay has passed since its last invocation.\n * Each new invocation resets the delay timer. This is useful for handling frequent events like window resizing\n * or input changes where you only want to execute the handler after the events have stopped occurring.\n *\n * Unlike throttling which allows execution at regular intervals, debouncing prevents any execution until\n * the function stops being called for the specified delay period.\n *\n * Unlike the non-async Debouncer, this async version supports returning values from the debounced function,\n * making it ideal for API calls and other async operations where you want the result of the `maybeExecute` call\n * instead of setting the result on a state variable from within the debounced function.\n *\n * Error Handling:\n * - If an `onError` handler is provided, it will be called with the error and debouncer instance\n * - If `throwOnError` is true (default when no onError handler is provided), the error will be thrown\n * - If `throwOnError` is false (default when onError handler is provided), the error will be swallowed\n * - Both onError and throwOnError can be used together - the handler will be called before any error is thrown\n * - The error state can be checked using the underlying store\n *\n * State Management:\n * - The debouncer uses a reactive store for state management\n * - Use `initialState` to provide initial state values when creating the async debouncer\n * - The state includes canLeadingExecute, error count, execution status, and success/settle counts\n * - State can be accessed via the `store` property and its `state` getter\n * - The store is reactive and will notify subscribers of state changes\n *\n * @example\n * ```ts\n * const asyncDebouncer = new AsyncDebouncer(async (value: string) => {\n *   const results = await searchAPI(value);\n *   return results; // Return value is preserved\n * }, {\n *   wait: 500,\n *   onError: (error) => {\n *     console.error('Search failed:', error);\n *   }\n * });\n *\n * // Called on each keystroke but only executes after 500ms of no typing\n * // Returns the API response directly\n * const results = await asyncDebouncer.maybeExecute(inputElement.value);\n * ```\n */\nexport class AsyncDebouncer<TFn extends AnyAsyncFunction> {\n  readonly store: Store<Readonly<AsyncDebouncerState<TFn>>> = new Store<\n    AsyncDebouncerState<TFn>\n  >(getDefaultAsyncDebouncerState<TFn>())\n  options: AsyncDebouncerOptions<TFn>\n  #abortController: AbortController | null = null\n  #timeoutId: NodeJS.Timeout | null = null\n  #resolvePreviousPromise:\n    | ((value?: ReturnType<TFn> | undefined) => void)\n    | null = null\n  #rejectPreviousPromise: ((reason?: unknown) => void) | null = null\n\n  constructor(\n    private fn: TFn,\n    initialOptions: AsyncDebouncerOptions<TFn>,\n  ) {\n    this.options = {\n      ...defaultOptions,\n      ...initialOptions,\n      throwOnError: initialOptions.throwOnError ?? !initialOptions.onError,\n    }\n    this.#setState(this.options.initialState ?? {})\n  }\n\n  /**\n   * Updates the async debouncer options\n   */\n  setOptions = (newOptions: Partial<AsyncDebouncerOptions<TFn>>): void => {\n    this.options = { ...this.options, ...newOptions }\n\n    // Cancel pending execution if the debouncer is disabled\n    if (!this.#getEnabled()) {\n      this.cancel()\n    }\n  }\n\n  #setState = (newState: Partial<AsyncDebouncerState<TFn>>): void => {\n    this.store.setState((state) => {\n      const combinedState = {\n        ...state,\n        ...newState,\n      }\n      const { isPending, isExecuting, settleCount } = combinedState\n      return {\n        ...combinedState,\n        status: !this.#getEnabled()\n          ? 'disabled'\n          : isPending\n            ? 'pending'\n            : isExecuting\n              ? 'executing'\n              : settleCount > 0\n                ? 'settled'\n                : 'idle',\n      }\n    })\n  }\n\n  /**\n   * Returns the current debouncer enabled state\n   */\n  #getEnabled = (): boolean => {\n    return !!parseFunctionOrValue(this.options.enabled, this)\n  }\n\n  /**\n   * Returns the current debouncer wait state\n   */\n  #getWait = (): number => {\n    return parseFunctionOrValue(this.options.wait, this)\n  }\n\n  /**\n   * Attempts to execute the debounced function.\n   * If a call is already in progress, it will be queued.\n   *\n   * Error Handling:\n   * - If the debounced function throws and no `onError` handler is configured,\n   *   the error will be thrown from this method.\n   * - If an `onError` handler is configured, errors will be caught and passed to the handler,\n   *   and this method will return undefined.\n   * - The error state can be checked using `getErrorCount()` and `getIsExecuting()`.\n   *\n   * @returns A promise that resolves with the function's return value, or undefined if an error occurred and was handled by onError\n   * @throws The error from the debounced function if no onError handler is configured\n   */\n  maybeExecute = async (\n    ...args: Parameters<TFn>\n  ): Promise<ReturnType<TFn> | undefined> => {\n    if (!this.#getEnabled()) return undefined\n    this.#cancelPendingExecution()\n    this.#setState({ lastArgs: args })\n\n    // Handle leading execution\n    if (this.options.leading && this.store.state.canLeadingExecute) {\n      this.#setState({ canLeadingExecute: false })\n      await this.#execute(...args)\n      return this.store.state.lastResult\n    }\n\n    // Handle trailing execution\n    if (this.options.trailing && this.#getEnabled()) {\n      this.#setState({ isPending: true })\n    }\n\n    return new Promise((resolve, reject) => {\n      this.#resolvePreviousPromise = resolve\n      this.#rejectPreviousPromise = reject\n      this.#timeoutId = setTimeout(async () => {\n        // Execute trailing if enabled\n        if (this.options.trailing && this.store.state.lastArgs) {\n          await this.#execute(...this.store.state.lastArgs)\n        }\n\n        // Reset state and resolve\n        this.#setState({ canLeadingExecute: true })\n        this.#resolvePreviousPromise = null\n        resolve(this.store.state.lastResult)\n      }, this.#getWait())\n    })\n  }\n\n  #execute = async (\n    ...args: Parameters<TFn>\n  ): Promise<ReturnType<TFn> | undefined> => {\n    if (!this.#getEnabled()) return undefined\n    this.#abortController = new AbortController()\n    try {\n      this.#setState({ isExecuting: true })\n      const result = await this.fn(...args) // EXECUTE!\n      this.#setState({\n        lastResult: result,\n        successCount: this.store.state.successCount + 1,\n      })\n      this.options.onSuccess?.(result, this)\n    } catch (error) {\n      this.#setState({\n        errorCount: this.store.state.errorCount + 1,\n      })\n      this.options.onError?.(error, this)\n      if (this.options.throwOnError) {\n        this.#rejectPreviousPromiseInternal(error)\n      }\n    } finally {\n      this.#setState({\n        isExecuting: false,\n        isPending: false,\n        lastArgs: undefined,\n        settleCount: this.store.state.settleCount + 1,\n      })\n      this.#abortController = null\n      this.options.onSettled?.(this)\n    }\n    return this.store.state.lastResult\n  }\n\n  /**\n   * Processes the current pending execution immediately\n   */\n  flush = async (): Promise<ReturnType<TFn> | undefined> => {\n    if (this.store.state.isPending && this.store.state.lastArgs) {\n      this.#abortExecution() // abort any current execution\n      this.#clearTimeout() // clear any existing timeout\n      const result = await this.#execute(...this.store.state.lastArgs)\n\n      // Resolve any pending promise from maybeExecute\n      this.#resolvePreviousPromiseInternal()\n\n      return result\n    }\n    return undefined\n  }\n\n  #resolvePreviousPromiseInternal = (): void => {\n    if (this.#resolvePreviousPromise) {\n      this.#resolvePreviousPromise(this.store.state.lastResult)\n      this.#resolvePreviousPromise = null\n    }\n  }\n\n  #rejectPreviousPromiseInternal = (error: unknown): void => {\n    if (this.#rejectPreviousPromise) {\n      this.#rejectPreviousPromise(error)\n      this.#rejectPreviousPromise = null\n    }\n  }\n\n  #clearTimeout = (): void => {\n    if (this.#timeoutId) {\n      clearTimeout(this.#timeoutId)\n      this.#timeoutId = null\n    }\n  }\n\n  #cancelPendingExecution = (): void => {\n    this.#clearTimeout()\n    this.#resolvePreviousPromiseInternal()\n    this.#setState({\n      isPending: false,\n      isExecuting: false,\n      lastArgs: undefined,\n    })\n  }\n\n  #abortExecution = (): void => {\n    if (this.#abortController) {\n      this.#abortController.abort()\n      this.#abortController = null\n    }\n  }\n\n  /**\n   * Cancels any pending execution or aborts any execution in progress\n   */\n  cancel = (): void => {\n    this.#cancelPendingExecution()\n    this.#abortExecution()\n    this.#setState({ canLeadingExecute: true })\n  }\n\n  /**\n   * Resets the debouncer state to its default values\n   */\n  reset = (): void => {\n    this.#setState(getDefaultAsyncDebouncerState<TFn>())\n  }\n}\n\n/**\n * Creates an async debounced function that delays execution until after a specified wait time.\n * The debounced function will only execute once the wait period has elapsed without any new calls.\n * If called again during the wait period, the timer resets and a new wait period begins.\n *\n * Unlike the non-async Debouncer, this async version supports returning values from the debounced function,\n * making it ideal for API calls and other async operations where you want the result of the `maybeExecute` call\n * instead of setting the result on a state variable from within the debounced function.\n *\n * Error Handling:\n * - If an `onError` handler is provided, it will be called with the error and debouncer instance\n * - If `throwOnError` is true (default when no onError handler is provided), the error will be thrown\n * - If `throwOnError` is false (default when onError handler is provided), the error will be swallowed\n * - The error state can be checked using the underlying AsyncDebouncer instance\n * - Both onError and throwOnError can be used together - the handler will be called before any error is thrown\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the async debouncer\n * - Use `onSuccess` callback to react to successful function execution and implement custom logic\n * - Use `onError` callback to react to function execution errors and implement custom error handling\n * - Use `onSettled` callback to react to function execution completion (success or error) and implement custom logic\n * - The state includes canLeadingExecute, error count, execution status, and success/settle counts\n * - State can be accessed via `asyncDebouncer.store.state` when using the class directly\n * - When using framework adapters (React/Solid), state is accessed from `asyncDebouncer.state`\n *\n * @example\n * ```ts\n * const debounced = asyncDebounce(async (value: string) => {\n *   const result = await saveToAPI(value);\n *   return result; // Return value is preserved\n * }, {\n *   wait: 1000,\n *   onError: (error) => {\n *     console.error('API call failed:', error);\n *   },\n *   throwOnError: true // Will both log the error and throw it\n * });\n *\n * // Will only execute once, 1 second after the last call\n * // Returns the API response directly\n * const result = await debounced(\"third\");\n * ```\n */\nexport function asyncDebounce<TFn extends AnyAsyncFunction>(\n  fn: TFn,\n  initialOptions: AsyncDebouncerOptions<TFn>,\n) {\n  const asyncDebouncer = new AsyncDebouncer(fn, initialOptions)\n  return 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dist/cjs/async-throttler.cjs

@@ -13,3 +13,3 @@ "use strict";
     lastResult: void 0,
-    nextExecutionTime: 0,
+    nextExecutionTime: void 0,
     settleCount: 0,
@@ -120,2 +120,7 @@ status: "idle",
         this.options.onSettled?.(this);
+        setTimeout(() => {
+          if (!this.store.state.isPending) {
+            this.#setState({ nextExecutionTime: void 0 });
+          }
+        }, this.#getWait());
       }
@@ -122,0 +127,0 @@ return this.store.state.lastResult;

dist/cjs/async-throttler.cjs.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"async-throttler.cjs","sources":["../../src/async-throttler.ts"],"sourcesContent":["import { Store } from '@tanstack/store'\nimport { parseFunctionOrValue } from './utils'\nimport type { AnyAsyncFunction, OptionalKeys } from './types'\n\nexport interface AsyncThrottlerState<TFn extends AnyAsyncFunction> {\n  /**\n   * Number of function executions that have resulted in errors\n   */\n  errorCount: number\n  /**\n   * Whether the throttled function is currently executing asynchronously\n   */\n  isExecuting: boolean\n  /**\n   * Whether the throttler is waiting for the timeout to trigger execution\n   */\n  isPending: boolean\n  /**\n   * The arguments from the most recent call to maybeExecute\n   */\n  lastArgs: Parameters<TFn> | undefined\n  /**\n   * Timestamp of the last function execution in milliseconds\n   */\n  lastExecutionTime: number\n  /**\n   * The result from the most recent successful function execution\n   */\n  lastResult: ReturnType<TFn> | undefined\n  /**\n   * Timestamp when the next execution can occur in milliseconds\n   */\n  nextExecutionTime: number\n  /**\n   * Number of function executions that have completed (either successfully or with errors)\n   */\n  settleCount: number\n  /**\n   * Current execution status - 'idle' when not active, 'pending' when waiting, 'executing' when running, 'settled' when completed\n   */\n  status: 'disabled' | 'idle' | 'pending' | 'executing' | 'settled'\n  /**\n   * Number of function executions that have completed successfully\n   */\n  successCount: number\n}\n\nfunction getDefaultAsyncThrottlerState<\n  TFn extends AnyAsyncFunction,\n>(): AsyncThrottlerState<TFn> {\n  return structuredClone({\n    errorCount: 0,\n    isExecuting: false,\n    isPending: false,\n    lastArgs: undefined,\n    lastExecutionTime: 0,\n    lastResult: undefined,\n    nextExecutionTime: 0,\n    settleCount: 0,\n    status: 'idle',\n    successCount: 0,\n  })\n}\n\n/**\n * Options for configuring an async throttled function\n */\nexport interface AsyncThrottlerOptions<TFn extends AnyAsyncFunction> {\n  /**\n   * Whether the throttler is enabled. When disabled, maybeExecute will not trigger any executions.\n   * Can be a boolean or a function that returns a boolean.\n   * Defaults to true.\n   */\n  enabled?: boolean | ((throttler: AsyncThrottler<TFn>) => boolean)\n  /**\n   * Initial state for the async throttler\n   */\n  initialState?: Partial<AsyncThrottlerState<TFn>>\n  /**\n   * Whether to execute the function immediately when called\n   * Defaults to true\n   */\n  leading?: boolean\n  /**\n   * Optional error handler for when the throttled function throws.\n   * If provided, the handler will be called with the error and throttler instance.\n   * This can be used alongside throwOnError - the handler will be called before any error is thrown.\n   */\n  onError?: (error: unknown, asyncThrottler: AsyncThrottler<TFn>) => void\n  /**\n   * Optional function to call when the throttled function is executed\n   */\n  onSettled?: (asyncThrottler: AsyncThrottler<TFn>) => void\n  /**\n   * Optional function to call when the throttled function is executed\n   */\n  onSuccess?: (\n    result: ReturnType<TFn>,\n    asyncThrottler: AsyncThrottler<TFn>,\n  ) => void\n  /**\n   * Whether to throw errors when they occur.\n   * Defaults to true if no onError handler is provided, false if an onError handler is provided.\n   * Can be explicitly set to override these defaults.\n   */\n  throwOnError?: boolean\n  /**\n   * Whether to execute the function on the trailing edge of the wait period\n   * Defaults to true\n   */\n  trailing?: boolean\n  /**\n   * Time window in milliseconds during which the function can only be executed once.\n   * Can be a number or a function that returns a number.\n   * Defaults to 0ms\n   */\n  wait: number | ((throttler: AsyncThrottler<TFn>) => number)\n}\n\ntype AsyncThrottlerOptionsWithOptionalCallbacks = OptionalKeys<\n  AsyncThrottlerOptions<any>,\n  'initialState' | 'onError' | 'onSettled' | 'onSuccess'\n>\n\nconst defaultOptions: AsyncThrottlerOptionsWithOptionalCallbacks = {\n  enabled: true,\n  leading: true,\n  trailing: true,\n  wait: 0,\n}\n\n/**\n * A class that creates an async throttled function.\n *\n * Throttling limits how often a function can be executed, allowing only one execution within a specified time window.\n * Unlike debouncing which resets the delay timer on each call, throttling ensures the function executes at a\n * regular interval regardless of how often it's called.\n *\n * Unlike the non-async Throttler, this async version supports returning values from the throttled function,\n * making it ideal for API calls and other async operations where you want the result of the `maybeExecute` call\n * instead of setting the result on a state variable from within the throttled function.\n *\n * This is useful for rate-limiting API calls, handling scroll/resize events, or any scenario where you want to\n * ensure a maximum execution frequency.\n *\n * Error Handling:\n * - If an `onError` handler is provided, it will be called with the error and throttler instance\n * - If `throwOnError` is true (default when no onError handler is provided), the error will be thrown\n * - If `throwOnError` is false (default when onError handler is provided), the error will be swallowed\n * - Both onError and throwOnError can be used together - the handler will be called before any error is thrown\n * - The error state can be checked using the underlying AsyncThrottler instance\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the async throttler\n * - Use `onSuccess` callback to react to successful function execution and implement custom logic\n * - Use `onError` callback to react to function execution errors and implement custom error handling\n * - Use `onSettled` callback to react to function execution completion (success or error) and implement custom logic\n * - The state includes error count, execution status, last execution time, and success/settle counts\n * - State can be accessed via `asyncThrottler.store.state` when using the class directly\n * - When using framework adapters (React/Solid), state is accessed from `asyncThrottler.state`\n *\n * @example\n * ```ts\n * const throttler = new AsyncThrottler(async (value: string) => {\n *   const result = await saveToAPI(value);\n *   return result; // Return value is preserved\n * }, {\n *   wait: 1000,\n *   onError: (error) => {\n *     console.error('API call failed:', error);\n *   }\n * });\n *\n * // Will only execute once per second no matter how often called\n * // Returns the API response directly\n * const result = await throttler.maybeExecute(inputElement.value);\n * ```\n */\nexport class AsyncThrottler<TFn extends AnyAsyncFunction> {\n  readonly store: Store<Readonly<AsyncThrottlerState<TFn>>> = new Store<\n    AsyncThrottlerState<TFn>\n  >(getDefaultAsyncThrottlerState<TFn>())\n  options: AsyncThrottlerOptions<TFn>\n  #abortController: AbortController | null = null\n  #timeoutId: NodeJS.Timeout | null = null\n  #resolvePreviousPromise:\n    | ((value?: ReturnType<TFn> | undefined) => void)\n    | null = null\n  #rejectPreviousPromise: ((reason?: unknown) => void) | null = null\n\n  constructor(\n    private fn: TFn,\n    initialOptions: AsyncThrottlerOptions<TFn>,\n  ) {\n    this.options = {\n      ...defaultOptions,\n      ...initialOptions,\n      throwOnError: initialOptions.throwOnError ?? !initialOptions.onError,\n    }\n    this.#setState(this.options.initialState ?? {})\n  }\n\n  /**\n   * Updates the async throttler options\n   */\n  setOptions = (newOptions: Partial<AsyncThrottlerOptions<TFn>>): void => {\n    this.options = { ...this.options, ...newOptions }\n\n    // End the pending state if the throttler is disabled\n    if (!this.#getEnabled()) {\n      this.cancel()\n    }\n  }\n\n  #setState = (newState: Partial<AsyncThrottlerState<TFn>>): void => {\n    this.store.setState((state) => {\n      const combinedState = {\n        ...state,\n        ...newState,\n      }\n      const { isPending, isExecuting, settleCount } = combinedState\n      return {\n        ...combinedState,\n        status: !this.#getEnabled()\n          ? 'disabled'\n          : isPending\n            ? 'pending'\n            : isExecuting\n              ? 'executing'\n              : settleCount > 0\n                ? 'settled'\n                : 'idle',\n      }\n    })\n  }\n\n  /**\n   * Returns the current enabled state of the async throttler\n   */\n  #getEnabled = (): boolean => {\n    return !!parseFunctionOrValue(this.options.enabled, this)\n  }\n\n  /**\n   * Returns the current wait time in milliseconds\n   */\n  #getWait = (): number => {\n    return parseFunctionOrValue(this.options.wait, this)\n  }\n\n  /**\n   * Attempts to execute the throttled function. The execution behavior depends on the throttler options:\n   *\n   * - If enough time has passed since the last execution (>= wait period):\n   *   - With leading=true: Executes immediately\n   *   - With leading=false: Waits for the next trailing execution\n   *\n   * - If within the wait period:\n   *   - With trailing=true: Schedules execution for end of wait period\n   *   - With trailing=false: Drops the execution\n   *\n   * @example\n   * ```ts\n   * const throttled = new AsyncThrottler(fn, { wait: 1000 });\n   *\n   * // First call executes immediately\n   * await throttled.maybeExecute('a', 'b');\n   *\n   * // Call during wait period - gets throttled\n   * await throttled.maybeExecute('c', 'd');\n   * ```\n   */\n  maybeExecute = async (\n    ...args: Parameters<TFn>\n  ): Promise<ReturnType<TFn> | undefined> => {\n    if (!this.#getEnabled()) return undefined\n    const now = Date.now()\n    const timeSinceLastExecution = now - this.store.state.lastExecutionTime\n    const wait = this.#getWait()\n    // Store the most recent arguments for potential trailing execution\n    this.#setState({ lastArgs: args })\n\n    this.#resolvePreviousPromiseInternal()\n\n    // Handle leading execution\n    if (this.options.leading && timeSinceLastExecution >= wait) {\n      await this.#execute(...args)\n      return this.store.state.lastResult\n    } else {\n      return new Promise((resolve, reject) => {\n        this.#resolvePreviousPromise = resolve\n        this.#rejectPreviousPromise = reject\n        // Clear any existing timeout to ensure we use the latest arguments\n        this.#clearTimeout()\n\n        // Set up trailing execution if enabled\n        if (this.options.trailing) {\n          const _timeSinceLastExecution = this.store.state.lastExecutionTime\n            ? now - this.store.state.lastExecutionTime\n            : 0\n          const timeoutDuration = wait - _timeSinceLastExecution\n          this.#setState({ isPending: true })\n          this.#timeoutId = setTimeout(async () => {\n            if (this.store.state.lastArgs !== undefined) {\n              await this.#execute(...this.store.state.lastArgs)\n            }\n            this.#resolvePreviousPromise = null\n            resolve(this.store.state.lastResult)\n          }, timeoutDuration)\n        }\n      })\n    }\n  }\n\n  #execute = async (\n    ...args: Parameters<TFn>\n  ): Promise<ReturnType<TFn> | undefined> => {\n    if (!this.#getEnabled() || this.store.state.isExecuting) return undefined\n    this.#abortController = new AbortController()\n    try {\n      this.#setState({ isExecuting: true })\n      const result = await this.fn(...args) // EXECUTE!\n      this.#setState({\n        lastResult: result,\n        successCount: this.store.state.successCount + 1,\n      })\n      this.options.onSuccess?.(result, this)\n    } catch (error) {\n      this.#setState({\n        errorCount: this.store.state.errorCount + 1,\n      })\n      this.options.onError?.(error, this)\n      if (this.options.throwOnError) {\n        this.#rejectPreviousPromiseInternal(error)\n      }\n    } finally {\n      const lastExecutionTime = Date.now()\n      const nextExecutionTime = lastExecutionTime + this.#getWait()\n      this.#setState({\n        isExecuting: false,\n        isPending: false,\n        settleCount: this.store.state.settleCount + 1,\n        lastExecutionTime,\n        nextExecutionTime,\n      })\n      this.#abortController = null\n      this.options.onSettled?.(this)\n    }\n    return this.store.state.lastResult\n  }\n\n  /**\n   * Processes the current pending execution immediately\n   */\n  flush = async (): Promise<ReturnType<TFn> | undefined> => {\n    if (this.store.state.isPending && this.store.state.lastArgs) {\n      this.#abortExecution() // abort any current execution\n      this.#clearTimeout() // clear any existing timeout\n      const result = await this.#execute(...this.store.state.lastArgs)\n\n      // Resolve any pending promise from maybeExecute\n      this.#resolvePreviousPromiseInternal()\n\n      return result\n    }\n    return undefined\n  }\n\n  #resolvePreviousPromiseInternal = (): void => {\n    if (this.#resolvePreviousPromise) {\n      this.#resolvePreviousPromise(this.store.state.lastResult)\n      this.#resolvePreviousPromise = null\n    }\n  }\n\n  #rejectPreviousPromiseInternal = (error: unknown): void => {\n    if (this.#rejectPreviousPromise) {\n      this.#rejectPreviousPromise(error)\n      this.#rejectPreviousPromise = null\n    }\n  }\n\n  #clearTimeout = (): void => {\n    if (this.#timeoutId) {\n      clearTimeout(this.#timeoutId)\n      this.#timeoutId = null\n    }\n  }\n\n  #cancelPendingExecution = (): void => {\n    this.#clearTimeout()\n    if (this.#resolvePreviousPromise) {\n      this.#resolvePreviousPromise(this.store.state.lastResult)\n      this.#resolvePreviousPromise = null\n    }\n    this.#setState({\n      isPending: false,\n      isExecuting: false,\n      lastArgs: undefined,\n    })\n  }\n\n  #abortExecution = (): void => {\n    if (this.#abortController) {\n      this.#abortController.abort()\n      this.#abortController = null\n    }\n  }\n\n  /**\n   * Cancels any pending execution or aborts any execution in progress\n   */\n  cancel = (): void => {\n    this.#cancelPendingExecution()\n    this.#abortExecution()\n  }\n\n  /**\n   * Resets the debouncer state to its default values\n   */\n  reset = (): void => {\n    this.#setState(getDefaultAsyncThrottlerState<TFn>())\n  }\n}\n\n/**\n * Creates an async throttled function that limits how often the function can execute.\n * The throttled function will execute at most once per wait period, even if called multiple times.\n * If called while executing, it will wait until execution completes before scheduling the next call.\n *\n * Unlike the non-async Throttler, this async version supports returning values from the throttled function,\n * making it ideal for API calls and other async operations where you want the result of the `maybeExecute` call\n * instead of setting the result on a state variable from within the throttled function.\n *\n * Error Handling:\n * - If an `onError` handler is provided, it will be called with the error and throttler instance\n * - If `throwOnError` is true (default when no onError handler is provided), the error will be thrown\n * - If `throwOnError` is false (default when onError handler is provided), the error will be swallowed\n * - Both onError and throwOnError can be used together - the handler will be called before any error is thrown\n * - The error state can be checked using the underlying AsyncThrottler instance\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the async throttler\n * - Use `onSuccess` callback to react to successful function execution and implement custom logic\n * - Use `onError` callback to react to function execution errors and implement custom error handling\n * - Use `onSettled` callback to react to function execution completion (success or error) and implement custom logic\n * - The state includes error count, execution status, last execution time, and success/settle counts\n * - State can be accessed via the underlying AsyncThrottler instance's `store.state` property\n * - When using framework adapters (React/Solid), state is accessed from the hook's state property\n *\n * @example\n * ```ts\n * const throttled = asyncThrottle(async (value: string) => {\n *   const result = await saveToAPI(value);\n *   return result; // Return value is preserved\n * }, {\n *   wait: 1000,\n *   onError: (error) => {\n *     console.error('API call failed:', error);\n *   }\n * });\n *\n * // This will execute at most once per second\n * // Returns the API response directly\n * const result = await throttled(inputElement.value);\n * ```\n */\nexport function asyncThrottle<TFn extends AnyAsyncFunction>(\n  fn: TFn,\n  initialOptions: AsyncThrottlerOptions<TFn>,\n) {\n  const asyncThrottler = new AsyncThrottler(fn, initialOptions)\n  return asyncThrottler.maybeExecute\n}\n"],"names":["Store","parseFunctionOrValue"],"mappings":";;;;AA+CA,SAAS,gCAEqB;AAC5B,SAAO,gBAAgB;AAAA,IACrB,YAAY;AAAA,IACZ,aAAa;AAAA,IACb,WAAW;AAAA,IACX,UAAU;AAAA,IACV,mBAAmB;AAAA,IACnB,YAAY;AAAA,IACZ,mBAAmB;AAAA,IACnB,aAAa;AAAA,IACb,QAAQ;AAAA,IACR,cAAc;AAAA,EAAA,CACf;AACH;AA8DA,MAAM,iBAA6D;AAAA,EACjE,SAAS;AAAA,EACT,SAAS;AAAA,EACT,UAAU;AAAA,EACV,MAAM;AACR;AAkDO,MAAM,eAA6C;AAAA,EAYxD,YACU,IACR,gBACA;AAFQ,SAAA,KAAA;AAZV,SAAS,QAAmD,IAAIA,MAAAA,MAE9D,8BAAA,CAAoC;AAEtC,SAAA,mBAA2C;AAC3C,SAAA,aAAoC;AACpC,SAAA,0BAEW;AACX,SAAA,yBAA8D;AAiB9D,SAAA,aAAa,CAAC,eAA0D;AACtE,WAAK,UAAU,EAAE,GAAG,KAAK,SAAS,GAAG,WAAA;AAGrC,UAAI,CAAC,KAAK,eAAe;AACvB,aAAK,OAAA;AAAA,MAAO;AAAA,IACd;AAGF,SAAA,YAAY,CAAC,aAAsD;AACjE,WAAK,MAAM,SAAS,CAAC,UAAU;AAC7B,cAAM,gBAAgB;AAAA,UACpB,GAAG;AAAA,UACH,GAAG;AAAA,QAAA;AAEL,cAAM,EAAE,WAAW,aAAa,YAAA,IAAgB;AAChD,eAAO;AAAA,UACL,GAAG;AAAA,UACH,QAAQ,CAAC,KAAK,YAAA,IACV,aACA,YACE,YACA,cACE,cACA,cAAc,IACZ,YACA;AAAA,QAAA;AAAA,MACZ,CACD;AAAA,IAAA;AAMH,SAAA,cAAc,MAAe;AAC3B,aAAO,CAAC,CAACC,MAAAA,qBAAqB,KAAK,QAAQ,SAAS,IAAI;AAAA,IAAA;AAM1D,SAAA,WAAW,MAAc;AACvB,aAAOA,MAAAA,qBAAqB,KAAK,QAAQ,MAAM,IAAI;AAAA,IAAA;AAyBrD,SAAA,eAAe,UACV,SACsC;AACzC,UAAI,CAAC,KAAK,YAAA,EAAe,QAAO;AAChC,YAAM,MAAM,KAAK,IAAA;AACjB,YAAM,yBAAyB,MAAM,KAAK,MAAM,MAAM;AACtD,YAAM,OAAO,KAAK,SAAA;AAElB,WAAK,UAAU,EAAE,UAAU,KAAA,CAAM;AAEjC,WAAK,gCAAA;AAGL,UAAI,KAAK,QAAQ,WAAW,0BAA0B,MAAM;AAC1D,cAAM,KAAK,SAAS,GAAG,IAAI;AAC3B,eAAO,KAAK,MAAM,MAAM;AAAA,MAAA,OACnB;AACL,eAAO,IAAI,QAAQ,CAAC,SAAS,WAAW;AACtC,eAAK,0BAA0B;AAC/B,eAAK,yBAAyB;AAE9B,eAAK,cAAA;AAGL,cAAI,KAAK,QAAQ,UAAU;AACzB,kBAAM,0BAA0B,KAAK,MAAM,MAAM,oBAC7C,MAAM,KAAK,MAAM,MAAM,oBACvB;AACJ,kBAAM,kBAAkB,OAAO;AAC/B,iBAAK,UAAU,EAAE,WAAW,KAAA,CAAM;AAClC,iBAAK,aAAa,WAAW,YAAY;AACvC,kBAAI,KAAK,MAAM,MAAM,aAAa,QAAW;AAC3C,sBAAM,KAAK,SAAS,GAAG,KAAK,MAAM,MAAM,QAAQ;AAAA,cAAA;AAElD,mBAAK,0BAA0B;AAC/B,sBAAQ,KAAK,MAAM,MAAM,UAAU;AAAA,YAAA,GAClC,eAAe;AAAA,UAAA;AAAA,QACpB,CACD;AAAA,MAAA;AAAA,IACH;AAGF,SAAA,WAAW,UACN,SACsC;AACzC,UAAI,CAAC,KAAK,iBAAiB,KAAK,MAAM,MAAM,YAAa,QAAO;AAChE,WAAK,mBAAmB,IAAI,gBAAA;AAC5B,UAAI;AACF,aAAK,UAAU,EAAE,aAAa,KAAA,CAAM;AACpC,cAAM,SAAS,MAAM,KAAK,GAAG,GAAG,IAAI;AACpC,aAAK,UAAU;AAAA,UACb,YAAY;AAAA,UACZ,cAAc,KAAK,MAAM,MAAM,eAAe;AAAA,QAAA,CAC/C;AACD,aAAK,QAAQ,YAAY,QAAQ,IAAI;AAAA,MAAA,SAC9B,OAAO;AACd,aAAK,UAAU;AAAA,UACb,YAAY,KAAK,MAAM,MAAM,aAAa;AAAA,QAAA,CAC3C;AACD,aAAK,QAAQ,UAAU,OAAO,IAAI;AAClC,YAAI,KAAK,QAAQ,cAAc;AAC7B,eAAK,+BAA+B,KAAK;AAAA,QAAA;AAAA,MAC3C,UACF;AACE,cAAM,oBAAoB,KAAK,IAAA;AAC/B,cAAM,oBAAoB,oBAAoB,KAAK,SAAA;AACnD,aAAK,UAAU;AAAA,UACb,aAAa;AAAA,UACb,WAAW;AAAA,UACX,aAAa,KAAK,MAAM,MAAM,cAAc;AAAA,UAC5C;AAAA,UACA;AAAA,QAAA,CACD;AACD,aAAK,mBAAmB;AACxB,aAAK,QAAQ,YAAY,IAAI;AAAA,MAAA;AAE/B,aAAO,KAAK,MAAM,MAAM;AAAA,IAAA;AAM1B,SAAA,QAAQ,YAAkD;AACxD,UAAI,KAAK,MAAM,MAAM,aAAa,KAAK,MAAM,MAAM,UAAU;AAC3D,aAAK,gBAAA;AACL,aAAK,cAAA;AACL,cAAM,SAAS,MAAM,KAAK,SAAS,GAAG,KAAK,MAAM,MAAM,QAAQ;AAG/D,aAAK,gCAAA;AAEL,eAAO;AAAA,MAAA;AAET,aAAO;AAAA,IAAA;AAGT,SAAA,kCAAkC,MAAY;AAC5C,UAAI,KAAK,yBAAyB;AAChC,aAAK,wBAAwB,KAAK,MAAM,MAAM,UAAU;AACxD,aAAK,0BAA0B;AAAA,MAAA;AAAA,IACjC;AAGF,SAAA,iCAAiC,CAAC,UAAyB;AACzD,UAAI,KAAK,wBAAwB;AAC/B,aAAK,uBAAuB,KAAK;AACjC,aAAK,yBAAyB;AAAA,MAAA;AAAA,IAChC;AAGF,SAAA,gBAAgB,MAAY;AAC1B,UAAI,KAAK,YAAY;AACnB,qBAAa,KAAK,UAAU;AAC5B,aAAK,aAAa;AAAA,MAAA;AAAA,IACpB;AAGF,SAAA,0BAA0B,MAAY;AACpC,WAAK,cAAA;AACL,UAAI,KAAK,yBAAyB;AAChC,aAAK,wBAAwB,KAAK,MAAM,MAAM,UAAU;AACxD,aAAK,0BAA0B;AAAA,MAAA;AAEjC,WAAK,UAAU;AAAA,QACb,WAAW;AAAA,QACX,aAAa;AAAA,QACb,UAAU;AAAA,MAAA,CACX;AAAA,IAAA;AAGH,SAAA,kBAAkB,MAAY;AAC5B,UAAI,KAAK,kBAAkB;AACzB,aAAK,iBAAiB,MAAA;AACtB,aAAK,mBAAmB;AAAA,MAAA;AAAA,IAC1B;AAMF,SAAA,SAAS,MAAY;AACnB,WAAK,wBAAA;AACL,WAAK,gBAAA;AAAA,IAAgB;AAMvB,SAAA,QAAQ,MAAY;AAClB,WAAK,UAAU,+BAAoC;AAAA,IAAA;AAnOnD,SAAK,UAAU;AAAA,MACb,GAAG;AAAA,MACH,GAAG;AAAA,MACH,cAAc,eAAe,gBAAgB,CAAC,eAAe;AAAA,IAAA;AAE/D,SAAK,UAAU,KAAK,QAAQ,gBAAgB,CAAA,CAAE;AAAA,EAAA;AAAA,EAhBhD;AAAA,EACA;AAAA,EACA;AAAA,EAGA;AAAA,EA0BA;AAAA,EAyBA;AAAA,EAOA;AAAA,EAoEA;AAAA,EAsDA;AAAA,EAOA;AAAA,EAOA;AAAA,EAOA;AAAA,EAaA;AAqBF;AA6CO,SAAS,cACd,IACA,gBACA;AACA,QAAM,iBAAiB,IAAI,eAAe,IAAI,cAAc;AAC5D,SAAO,eAAe;AACxB;;;"}
+{"version":3,"file":"async-throttler.cjs","sources":["../../src/async-throttler.ts"],"sourcesContent":["import { Store } from '@tanstack/store'\nimport { parseFunctionOrValue } from './utils'\nimport type { AnyAsyncFunction, OptionalKeys } from './types'\n\nexport interface AsyncThrottlerState<TFn extends AnyAsyncFunction> {\n  /**\n   * Number of function executions that have resulted in errors\n   */\n  errorCount: number\n  /**\n   * Whether the throttled function is currently executing asynchronously\n   */\n  isExecuting: boolean\n  /**\n   * Whether the throttler is waiting for the timeout to trigger execution\n   */\n  isPending: boolean\n  /**\n   * The arguments from the most recent call to maybeExecute\n   */\n  lastArgs: Parameters<TFn> | undefined\n  /**\n   * Timestamp of the last function execution in milliseconds\n   */\n  lastExecutionTime: number\n  /**\n   * The result from the most recent successful function execution\n   */\n  lastResult: ReturnType<TFn> | undefined\n  /**\n   * Timestamp when the next execution can occur in milliseconds\n   */\n  nextExecutionTime: number | undefined\n  /**\n   * Number of function executions that have completed (either successfully or with errors)\n   */\n  settleCount: number\n  /**\n   * Current execution status - 'idle' when not active, 'pending' when waiting, 'executing' when running, 'settled' when completed\n   */\n  status: 'disabled' | 'idle' | 'pending' | 'executing' | 'settled'\n  /**\n   * Number of function executions that have completed successfully\n   */\n  successCount: number\n}\n\nfunction getDefaultAsyncThrottlerState<\n  TFn extends AnyAsyncFunction,\n>(): AsyncThrottlerState<TFn> {\n  return structuredClone({\n    errorCount: 0,\n    isExecuting: false,\n    isPending: false,\n    lastArgs: undefined,\n    lastExecutionTime: 0,\n    lastResult: undefined,\n    nextExecutionTime: undefined,\n    settleCount: 0,\n    status: 'idle',\n    successCount: 0,\n  })\n}\n\n/**\n * Options for configuring an async throttled function\n */\nexport interface AsyncThrottlerOptions<TFn extends AnyAsyncFunction> {\n  /**\n   * Whether the throttler is enabled. When disabled, maybeExecute will not trigger any executions.\n   * Can be a boolean or a function that returns a boolean.\n   * Defaults to true.\n   */\n  enabled?: boolean | ((throttler: AsyncThrottler<TFn>) => boolean)\n  /**\n   * Initial state for the async throttler\n   */\n  initialState?: Partial<AsyncThrottlerState<TFn>>\n  /**\n   * Whether to execute the function immediately when called\n   * Defaults to true\n   */\n  leading?: boolean\n  /**\n   * Optional error handler for when the throttled function throws.\n   * If provided, the handler will be called with the error and throttler instance.\n   * This can be used alongside throwOnError - the handler will be called before any error is thrown.\n   */\n  onError?: (error: unknown, asyncThrottler: AsyncThrottler<TFn>) => void\n  /**\n   * Optional function to call when the throttled function is executed\n   */\n  onSettled?: (asyncThrottler: AsyncThrottler<TFn>) => void\n  /**\n   * Optional function to call when the throttled function is executed\n   */\n  onSuccess?: (\n    result: ReturnType<TFn>,\n    asyncThrottler: AsyncThrottler<TFn>,\n  ) => void\n  /**\n   * Whether to throw errors when they occur.\n   * Defaults to true if no onError handler is provided, false if an onError handler is provided.\n   * Can be explicitly set to override these defaults.\n   */\n  throwOnError?: boolean\n  /**\n   * Whether to execute the function on the trailing edge of the wait period\n   * Defaults to true\n   */\n  trailing?: boolean\n  /**\n   * Time window in milliseconds during which the function can only be executed once.\n   * Can be a number or a function that returns a number.\n   * Defaults to 0ms\n   */\n  wait: number | ((throttler: AsyncThrottler<TFn>) => number)\n}\n\ntype AsyncThrottlerOptionsWithOptionalCallbacks = OptionalKeys<\n  AsyncThrottlerOptions<any>,\n  'initialState' | 'onError' | 'onSettled' | 'onSuccess'\n>\n\nconst defaultOptions: AsyncThrottlerOptionsWithOptionalCallbacks = {\n  enabled: true,\n  leading: true,\n  trailing: true,\n  wait: 0,\n}\n\n/**\n * A class that creates an async throttled function.\n *\n * Throttling limits how often a function can be executed, allowing only one execution within a specified time window.\n * Unlike debouncing which resets the delay timer on each call, throttling ensures the function executes at a\n * regular interval regardless of how often it's called.\n *\n * Unlike the non-async Throttler, this async version supports returning values from the throttled function,\n * making it ideal for API calls and other async operations where you want the result of the `maybeExecute` call\n * instead of setting the result on a state variable from within the throttled function.\n *\n * This is useful for rate-limiting API calls, handling scroll/resize events, or any scenario where you want to\n * ensure a maximum execution frequency.\n *\n * Error Handling:\n * - If an `onError` handler is provided, it will be called with the error and throttler instance\n * - If `throwOnError` is true (default when no onError handler is provided), the error will be thrown\n * - If `throwOnError` is false (default when onError handler is provided), the error will be swallowed\n * - Both onError and throwOnError can be used together - the handler will be called before any error is thrown\n * - The error state can be checked using the underlying AsyncThrottler instance\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the async throttler\n * - Use `onSuccess` callback to react to successful function execution and implement custom logic\n * - Use `onError` callback to react to function execution errors and implement custom error handling\n * - Use `onSettled` callback to react to function execution completion (success or error) and implement custom logic\n * - The state includes error count, execution status, last execution time, and success/settle counts\n * - State can be accessed via `asyncThrottler.store.state` when using the class directly\n * - When using framework adapters (React/Solid), state is accessed from `asyncThrottler.state`\n *\n * @example\n * ```ts\n * const throttler = new AsyncThrottler(async (value: string) => {\n *   const result = await saveToAPI(value);\n *   return result; // Return value is preserved\n * }, {\n *   wait: 1000,\n *   onError: (error) => {\n *     console.error('API call failed:', error);\n *   }\n * });\n *\n * // Will only execute once per second no matter how often called\n * // Returns the API response directly\n * const result = await throttler.maybeExecute(inputElement.value);\n * ```\n */\nexport class AsyncThrottler<TFn extends AnyAsyncFunction> {\n  readonly store: Store<Readonly<AsyncThrottlerState<TFn>>> = new Store<\n    AsyncThrottlerState<TFn>\n  >(getDefaultAsyncThrottlerState<TFn>())\n  options: AsyncThrottlerOptions<TFn>\n  #abortController: AbortController | null = null\n  #timeoutId: NodeJS.Timeout | null = null\n  #resolvePreviousPromise:\n    | ((value?: ReturnType<TFn> | undefined) => void)\n    | null = null\n  #rejectPreviousPromise: ((reason?: unknown) => void) | null = null\n\n  constructor(\n    private fn: TFn,\n    initialOptions: AsyncThrottlerOptions<TFn>,\n  ) {\n    this.options = {\n      ...defaultOptions,\n      ...initialOptions,\n      throwOnError: initialOptions.throwOnError ?? !initialOptions.onError,\n    }\n    this.#setState(this.options.initialState ?? {})\n  }\n\n  /**\n   * Updates the async throttler options\n   */\n  setOptions = (newOptions: Partial<AsyncThrottlerOptions<TFn>>): void => {\n    this.options = { ...this.options, ...newOptions }\n\n    // End the pending state if the throttler is disabled\n    if (!this.#getEnabled()) {\n      this.cancel()\n    }\n  }\n\n  #setState = (newState: Partial<AsyncThrottlerState<TFn>>): void => {\n    this.store.setState((state) => {\n      const combinedState = {\n        ...state,\n        ...newState,\n      }\n      const { isPending, isExecuting, settleCount } = combinedState\n      return {\n        ...combinedState,\n        status: !this.#getEnabled()\n          ? 'disabled'\n          : isPending\n            ? 'pending'\n            : isExecuting\n              ? 'executing'\n              : settleCount > 0\n                ? 'settled'\n                : 'idle',\n      }\n    })\n  }\n\n  /**\n   * Returns the current enabled state of the async throttler\n   */\n  #getEnabled = (): boolean => {\n    return !!parseFunctionOrValue(this.options.enabled, this)\n  }\n\n  /**\n   * Returns the current wait time in milliseconds\n   */\n  #getWait = (): number => {\n    return parseFunctionOrValue(this.options.wait, this)\n  }\n\n  /**\n   * Attempts to execute the throttled function. The execution behavior depends on the throttler options:\n   *\n   * - If enough time has passed since the last execution (>= wait period):\n   *   - With leading=true: Executes immediately\n   *   - With leading=false: Waits for the next trailing execution\n   *\n   * - If within the wait period:\n   *   - With trailing=true: Schedules execution for end of wait period\n   *   - With trailing=false: Drops the execution\n   *\n   * @example\n   * ```ts\n   * const throttled = new AsyncThrottler(fn, { wait: 1000 });\n   *\n   * // First call executes immediately\n   * await throttled.maybeExecute('a', 'b');\n   *\n   * // Call during wait period - gets throttled\n   * await throttled.maybeExecute('c', 'd');\n   * ```\n   */\n  maybeExecute = async (\n    ...args: Parameters<TFn>\n  ): Promise<ReturnType<TFn> | undefined> => {\n    if (!this.#getEnabled()) return undefined\n    const now = Date.now()\n    const timeSinceLastExecution = now - this.store.state.lastExecutionTime\n    const wait = this.#getWait()\n    // Store the most recent arguments for potential trailing execution\n    this.#setState({ lastArgs: args })\n\n    this.#resolvePreviousPromiseInternal()\n\n    // Handle leading execution\n    if (this.options.leading && timeSinceLastExecution >= wait) {\n      await this.#execute(...args)\n      return this.store.state.lastResult\n    } else {\n      return new Promise((resolve, reject) => {\n        this.#resolvePreviousPromise = resolve\n        this.#rejectPreviousPromise = reject\n        // Clear any existing timeout to ensure we use the latest arguments\n        this.#clearTimeout()\n\n        // Set up trailing execution if enabled\n        if (this.options.trailing) {\n          const _timeSinceLastExecution = this.store.state.lastExecutionTime\n            ? now - this.store.state.lastExecutionTime\n            : 0\n          const timeoutDuration = wait - _timeSinceLastExecution\n          this.#setState({ isPending: true })\n          this.#timeoutId = setTimeout(async () => {\n            if (this.store.state.lastArgs !== undefined) {\n              await this.#execute(...this.store.state.lastArgs)\n            }\n            this.#resolvePreviousPromise = null\n            resolve(this.store.state.lastResult)\n          }, timeoutDuration)\n        }\n      })\n    }\n  }\n\n  #execute = async (\n    ...args: Parameters<TFn>\n  ): Promise<ReturnType<TFn> | undefined> => {\n    if (!this.#getEnabled() || this.store.state.isExecuting) return undefined\n    this.#abortController = new AbortController()\n    try {\n      this.#setState({ isExecuting: true })\n      const result = await this.fn(...args) // EXECUTE!\n      this.#setState({\n        lastResult: result,\n        successCount: this.store.state.successCount + 1,\n      })\n      this.options.onSuccess?.(result, this)\n    } catch (error) {\n      this.#setState({\n        errorCount: this.store.state.errorCount + 1,\n      })\n      this.options.onError?.(error, this)\n      if (this.options.throwOnError) {\n        this.#rejectPreviousPromiseInternal(error)\n      }\n    } finally {\n      const lastExecutionTime = Date.now()\n      const nextExecutionTime = lastExecutionTime + this.#getWait()\n      this.#setState({\n        isExecuting: false,\n        isPending: false,\n        settleCount: this.store.state.settleCount + 1,\n        lastExecutionTime,\n        nextExecutionTime,\n      })\n      this.#abortController = null\n      this.options.onSettled?.(this)\n      setTimeout(() => {\n        if (!this.store.state.isPending) {\n          this.#setState({ nextExecutionTime: undefined })\n        }\n      }, this.#getWait())\n    }\n    return this.store.state.lastResult\n  }\n\n  /**\n   * Processes the current pending execution immediately\n   */\n  flush = async (): Promise<ReturnType<TFn> | undefined> => {\n    if (this.store.state.isPending && this.store.state.lastArgs) {\n      this.#abortExecution() // abort any current execution\n      this.#clearTimeout() // clear any existing timeout\n      const result = await this.#execute(...this.store.state.lastArgs)\n\n      // Resolve any pending promise from maybeExecute\n      this.#resolvePreviousPromiseInternal()\n\n      return result\n    }\n    return undefined\n  }\n\n  #resolvePreviousPromiseInternal = (): void => {\n    if (this.#resolvePreviousPromise) {\n      this.#resolvePreviousPromise(this.store.state.lastResult)\n      this.#resolvePreviousPromise = null\n    }\n  }\n\n  #rejectPreviousPromiseInternal = (error: unknown): void => {\n    if (this.#rejectPreviousPromise) {\n      this.#rejectPreviousPromise(error)\n      this.#rejectPreviousPromise = null\n    }\n  }\n\n  #clearTimeout = (): void => {\n    if (this.#timeoutId) {\n      clearTimeout(this.#timeoutId)\n      this.#timeoutId = null\n    }\n  }\n\n  #cancelPendingExecution = (): void => {\n    this.#clearTimeout()\n    if (this.#resolvePreviousPromise) {\n      this.#resolvePreviousPromise(this.store.state.lastResult)\n      this.#resolvePreviousPromise = null\n    }\n    this.#setState({\n      isPending: false,\n      isExecuting: false,\n      lastArgs: undefined,\n    })\n  }\n\n  #abortExecution = (): void => {\n    if (this.#abortController) {\n      this.#abortController.abort()\n      this.#abortController = null\n    }\n  }\n\n  /**\n   * Cancels any pending execution or aborts any execution in progress\n   */\n  cancel = (): void => {\n    this.#cancelPendingExecution()\n    this.#abortExecution()\n  }\n\n  /**\n   * Resets the debouncer state to its default values\n   */\n  reset = (): void => {\n    this.#setState(getDefaultAsyncThrottlerState<TFn>())\n  }\n}\n\n/**\n * Creates an async throttled function that limits how often the function can execute.\n * The throttled function will execute at most once per wait period, even if called multiple times.\n * If called while executing, it will wait until execution completes before scheduling the next call.\n *\n * Unlike the non-async Throttler, this async version supports returning values from the throttled function,\n * making it ideal for API calls and other async operations where you want the result of the `maybeExecute` call\n * instead of setting the result on a state variable from within the throttled function.\n *\n * Error Handling:\n * - If an `onError` handler is provided, it will be called with the error and throttler instance\n * - If `throwOnError` is true (default when no onError handler is provided), the error will be thrown\n * - If `throwOnError` is false (default when onError handler is provided), the error will be swallowed\n * - Both onError and throwOnError can be used together - the handler will be called before any error is thrown\n * - The error state can be checked using the underlying AsyncThrottler instance\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the async throttler\n * - Use `onSuccess` callback to react to successful function execution and implement custom logic\n * - Use `onError` callback to react to function execution errors and implement custom error handling\n * - Use `onSettled` callback to react to function execution completion (success or error) and implement custom logic\n * - The state includes error count, execution status, last execution time, and success/settle counts\n * - State can be accessed via the underlying AsyncThrottler instance's `store.state` property\n * - When using framework adapters (React/Solid), state is accessed from the hook's state property\n *\n * @example\n * ```ts\n * const throttled = asyncThrottle(async (value: string) => {\n *   const result = await saveToAPI(value);\n *   return result; // Return value is preserved\n * }, {\n *   wait: 1000,\n *   onError: (error) => {\n *     console.error('API call failed:', error);\n *   }\n * });\n *\n * // This will execute at most once per second\n * // Returns the API response directly\n * const result = await throttled(inputElement.value);\n * ```\n */\nexport function asyncThrottle<TFn extends AnyAsyncFunction>(\n  fn: TFn,\n  initialOptions: AsyncThrottlerOptions<TFn>,\n) {\n  const asyncThrottler = new AsyncThrottler(fn, initialOptions)\n  return 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dist/cjs/async-throttler.d.cts

@@ -31,3 +31,3 @@ import { Store } from '@tanstack/store';
      */
-    nextExecutionTime: number;
+    nextExecutionTime: number | undefined;
     /**
@@ -34,0 +34,0 @@ * Number of function executions that have completed (either successfully or with errors)

dist/cjs/debouncer.cjs

@@ -74,4 +74,5 @@ "use strict";
       this.#setState({
+        executionCount: this.store.state.executionCount + 1,
         isPending: false,
-        executionCount: this.store.state.executionCount + 1
+        lastArgs: void 0
       });
@@ -78,0 +79,0 @@ this.options.onExecute?.(this);

dist/cjs/debouncer.cjs.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"debouncer.cjs","sources":["../../src/debouncer.ts"],"sourcesContent":["import { Store } from '@tanstack/store'\nimport { parseFunctionOrValue } from './utils'\nimport type { AnyFunction } from './types'\n\nexport interface DebouncerState<TFn extends AnyFunction> {\n  /**\n   * Whether the debouncer can execute on the leading edge of the timeout\n   */\n  canLeadingExecute: boolean\n  /**\n   * Number of function executions that have been completed\n   */\n  executionCount: number\n  /**\n   * Whether the debouncer is waiting for the timeout to trigger execution\n   */\n  isPending: boolean\n  /**\n   * The arguments from the most recent call to maybeExecute\n   */\n  lastArgs: Parameters<TFn> | undefined\n  /**\n   * Current execution status - 'idle' when not active, 'pending' when waiting for timeout\n   */\n  status: 'disabled' | 'idle' | 'pending'\n}\n\nfunction getDefaultDebouncerState<\n  TFn extends AnyFunction,\n>(): DebouncerState<TFn> {\n  return structuredClone({\n    canLeadingExecute: true,\n    executionCount: 0,\n    isPending: false,\n    lastArgs: undefined,\n    status: 'idle',\n  })\n}\n\n/**\n * Options for configuring a debounced function\n */\nexport interface DebouncerOptions<TFn extends AnyFunction> {\n  /**\n   * Whether the debouncer is enabled. When disabled, maybeExecute will not trigger any executions.\n   * Can be a boolean or a function that returns a boolean.\n   * Defaults to true.\n   */\n  enabled?: boolean | ((debouncer: Debouncer<TFn>) => boolean)\n  /**\n   * Initial state for the debouncer\n   */\n  initialState?: Partial<DebouncerState<TFn>>\n  /**\n   * Whether to execute on the leading edge of the timeout.\n   * The first call will execute immediately and the rest will wait the delay.\n   * Defaults to false.\n   */\n  leading?: boolean\n  /**\n   * Callback function that is called after the function is executed\n   */\n  onExecute?: (debouncer: Debouncer<TFn>) => void\n  /**\n   * Whether to execute on the trailing edge of the timeout.\n   * Defaults to true.\n   */\n  trailing?: boolean\n  /**\n   * Delay in milliseconds before executing the function.\n   * Can be a number or a function that returns a number.\n   * Defaults to 0ms\n   */\n  wait: number | ((debouncer: Debouncer<TFn>) => number)\n}\n\nconst defaultOptions: Omit<\n  Required<DebouncerOptions<any>>,\n  'initialState' | 'onExecute'\n> = {\n  enabled: true,\n  leading: false,\n  trailing: true,\n  wait: 0,\n}\n\n/**\n * A class that creates a debounced function.\n *\n * Debouncing ensures that a function is only executed after a certain amount of time has passed\n * since its last invocation. This is useful for handling frequent events like window resizing,\n * scroll events, or input changes where you want to limit the rate of execution.\n *\n * The debounced function can be configured to execute either at the start of the delay period\n * (leading edge) or at the end (trailing edge, default). Each new call during the wait period\n * will reset the timer.\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the debouncer\n * - Use `onExecute` callback to react to function execution and implement custom logic\n * - The state includes canLeadingExecute, execution count, and isPending status\n * - State can be accessed via `debouncer.store.state` when using the class directly\n * - When using framework adapters (React/Solid), state is accessed from `debouncer.state`\n *\n * @example\n * ```ts\n * const debouncer = new Debouncer((value: string) => {\n *   saveToDatabase(value);\n * }, { wait: 500 });\n *\n * // Will only save after 500ms of no new input\n * inputElement.addEventListener('input', () => {\n *   debouncer.maybeExecute(inputElement.value);\n * });\n * ```\n */\nexport class Debouncer<TFn extends AnyFunction> {\n  readonly store: Store<Readonly<DebouncerState<TFn>>> = new Store(\n    getDefaultDebouncerState<TFn>(),\n  )\n  options: DebouncerOptions<TFn>\n  #timeoutId: NodeJS.Timeout | undefined\n\n  constructor(\n    private fn: TFn,\n    initialOptions: DebouncerOptions<TFn>,\n  ) {\n    this.options = {\n      ...defaultOptions,\n      ...initialOptions,\n    }\n    this.#setState(this.options.initialState ?? {})\n  }\n\n  /**\n   * Updates the debouncer options\n   */\n  setOptions = (newOptions: Partial<DebouncerOptions<TFn>>): void => {\n    this.options = { ...this.options, ...newOptions }\n\n    // Cancel pending execution if the debouncer is disabled\n    if (!this.#getEnabled()) {\n      this.cancel()\n    }\n  }\n\n  #setState = (newState: Partial<DebouncerState<TFn>>): void => {\n    this.store.setState((state) => {\n      const combinedState = {\n        ...state,\n        ...newState,\n      }\n      const { isPending } = combinedState\n      return {\n        ...combinedState,\n        status: !this.#getEnabled()\n          ? 'disabled'\n          : isPending\n            ? 'pending'\n            : 'idle',\n      }\n    })\n  }\n\n  /**\n   * Returns the current enabled state of the debouncer\n   */\n  #getEnabled = (): boolean => {\n    return !!parseFunctionOrValue(this.options.enabled, this)\n  }\n\n  /**\n   * Returns the current wait time in milliseconds\n   */\n  #getWait = (): number => {\n    return parseFunctionOrValue(this.options.wait, this)\n  }\n\n  /**\n   * Attempts to execute the debounced function\n   * If a call is already in progress, it will be queued\n   */\n  maybeExecute = (...args: Parameters<TFn>): void => {\n    if (!this.#getEnabled()) return undefined\n    let _didLeadingExecute = false\n\n    // Handle leading execution\n    if (this.options.leading && this.store.state.canLeadingExecute) {\n      this.#setState({ canLeadingExecute: false })\n      _didLeadingExecute = true\n      this.#execute(...args)\n    }\n\n    // Start pending state to indicate that the debouncer is waiting for the trailing edge\n    if (this.options.trailing) {\n      this.#setState({ isPending: true, lastArgs: args })\n    }\n\n    // Clear any existing timeout\n    if (this.#timeoutId) clearTimeout(this.#timeoutId)\n\n    // Set new timeout that will reset canLeadingExecute and execute trailing only if enabled and did not execute leading\n    this.#timeoutId = setTimeout(() => {\n      this.#setState({ canLeadingExecute: true })\n      if (this.options.trailing && !_didLeadingExecute) {\n        this.#execute(...args)\n      }\n    }, this.#getWait())\n  }\n\n  #execute = (...args: Parameters<TFn>): void => {\n    if (!this.#getEnabled()) return undefined\n    this.fn(...args) // EXECUTE!\n    this.#setState({\n      isPending: false,\n      executionCount: this.store.state.executionCount + 1,\n    })\n    this.options.onExecute?.(this)\n  }\n\n  /**\n   * Processes the current pending execution immediately\n   */\n  flush = (): void => {\n    if (this.store.state.isPending && this.store.state.lastArgs) {\n      this.#clearTimeout() // clear any pending timeout\n      this.#execute(...this.store.state.lastArgs) // execute immediately\n    }\n  }\n\n  #clearTimeout = (): void => {\n    if (this.#timeoutId) {\n      clearTimeout(this.#timeoutId)\n      this.#timeoutId = undefined\n    }\n  }\n\n  /**\n   * Cancels any pending execution\n   */\n  cancel = (): void => {\n    this.#clearTimeout()\n    this.#setState({\n      canLeadingExecute: true,\n      isPending: false,\n    })\n  }\n\n  /**\n   * Resets the debouncer state to its default values\n   */\n  reset = (): void => {\n    this.#setState(getDefaultDebouncerState<TFn>())\n  }\n}\n\n/**\n * Creates a debounced function that delays invoking the provided function until after a specified wait time.\n * Multiple calls during the wait period will cancel previous pending invocations and reset the timer.\n *\n * This the the simple function wrapper implementation pulled from the Debouncer class. 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+{"version":3,"file":"debouncer.cjs","sources":["../../src/debouncer.ts"],"sourcesContent":["import { Store } from '@tanstack/store'\nimport { parseFunctionOrValue } from './utils'\nimport type { AnyFunction } from './types'\n\nexport interface DebouncerState<TFn extends AnyFunction> {\n  /**\n   * Whether the debouncer can execute on the leading edge of the timeout\n   */\n  canLeadingExecute: boolean\n  /**\n   * Number of function executions that have been completed\n   */\n  executionCount: number\n  /**\n   * Whether the debouncer is waiting for the timeout to trigger execution\n   */\n  isPending: boolean\n  /**\n   * The arguments from the most recent call to maybeExecute\n   */\n  lastArgs: Parameters<TFn> | undefined\n  /**\n   * Current execution status - 'idle' when not active, 'pending' when waiting for timeout\n   */\n  status: 'disabled' | 'idle' | 'pending'\n}\n\nfunction getDefaultDebouncerState<\n  TFn extends AnyFunction,\n>(): DebouncerState<TFn> {\n  return structuredClone({\n    canLeadingExecute: true,\n    executionCount: 0,\n    isPending: false,\n    lastArgs: undefined,\n    status: 'idle',\n  })\n}\n\n/**\n * Options for configuring a debounced function\n */\nexport interface DebouncerOptions<TFn extends AnyFunction> {\n  /**\n   * Whether the debouncer is enabled. When disabled, maybeExecute will not trigger any executions.\n   * Can be a boolean or a function that returns a boolean.\n   * Defaults to true.\n   */\n  enabled?: boolean | ((debouncer: Debouncer<TFn>) => boolean)\n  /**\n   * Initial state for the debouncer\n   */\n  initialState?: Partial<DebouncerState<TFn>>\n  /**\n   * Whether to execute on the leading edge of the timeout.\n   * The first call will execute immediately and the rest will wait the delay.\n   * Defaults to false.\n   */\n  leading?: boolean\n  /**\n   * Callback function that is called after the function is executed\n   */\n  onExecute?: (debouncer: Debouncer<TFn>) => void\n  /**\n   * Whether to execute on the trailing edge of the timeout.\n   * Defaults to true.\n   */\n  trailing?: boolean\n  /**\n   * Delay in milliseconds before executing the function.\n   * Can be a number or a function that returns a number.\n   * Defaults to 0ms\n   */\n  wait: number | ((debouncer: Debouncer<TFn>) => number)\n}\n\nconst defaultOptions: Omit<\n  Required<DebouncerOptions<any>>,\n  'initialState' | 'onExecute'\n> = {\n  enabled: true,\n  leading: false,\n  trailing: true,\n  wait: 0,\n}\n\n/**\n * A class that creates a debounced function.\n *\n * Debouncing ensures that a function is only executed after a certain amount of time has passed\n * since its last invocation. This is useful for handling frequent events like window resizing,\n * scroll events, or input changes where you want to limit the rate of execution.\n *\n * The debounced function can be configured to execute either at the start of the delay period\n * (leading edge) or at the end (trailing edge, default). Each new call during the wait period\n * will reset the timer.\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the debouncer\n * - Use `onExecute` callback to react to function execution and implement custom logic\n * - The state includes canLeadingExecute, execution count, and isPending status\n * - State can be accessed via `debouncer.store.state` when using the class directly\n * - When using framework adapters (React/Solid), state is accessed from `debouncer.state`\n *\n * @example\n * ```ts\n * const debouncer = new Debouncer((value: string) => {\n *   saveToDatabase(value);\n * }, { wait: 500 });\n *\n * // Will only save after 500ms of no new input\n * inputElement.addEventListener('input', () => {\n *   debouncer.maybeExecute(inputElement.value);\n * });\n * ```\n */\nexport class Debouncer<TFn extends AnyFunction> {\n  readonly store: Store<Readonly<DebouncerState<TFn>>> = new Store(\n    getDefaultDebouncerState<TFn>(),\n  )\n  options: DebouncerOptions<TFn>\n  #timeoutId: NodeJS.Timeout | undefined\n\n  constructor(\n    private fn: TFn,\n    initialOptions: DebouncerOptions<TFn>,\n  ) {\n    this.options = {\n      ...defaultOptions,\n      ...initialOptions,\n    }\n    this.#setState(this.options.initialState ?? {})\n  }\n\n  /**\n   * Updates the debouncer options\n   */\n  setOptions = (newOptions: Partial<DebouncerOptions<TFn>>): void => {\n    this.options = { ...this.options, ...newOptions }\n\n    // Cancel pending execution if the debouncer is disabled\n    if (!this.#getEnabled()) {\n      this.cancel()\n    }\n  }\n\n  #setState = (newState: Partial<DebouncerState<TFn>>): void => {\n    this.store.setState((state) => {\n      const combinedState = {\n        ...state,\n        ...newState,\n      }\n      const { isPending } = combinedState\n      return {\n        ...combinedState,\n        status: !this.#getEnabled()\n          ? 'disabled'\n          : isPending\n            ? 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If you need\n * more control over the debouncing behavior, use the Debouncer class directly.\n *\n * If leading option is true, the function will execute immediately on the first call, then wait the delay\n * before allowing another execution.\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the debouncer\n * - Use `onExecute` callback to react to function execution and implement custom logic\n * - The state includes canLeadingExecute, execution count, and isPending status\n * - State can be accessed via the underlying Debouncer instance's `store.state` property\n * - When using framework adapters (React/Solid), state is accessed from the hook's state property\n *\n * @example\n * ```ts\n * const debounced = debounce(() => {\n *   saveChanges();\n * }, { wait: 1000 });\n *\n * // Called repeatedly but executes at most once per second\n * inputElement.addEventListener('input', debounced);\n * ```\n */\nexport function debounce<TFn extends AnyFunction>(\n  fn: TFn,\n  initialOptions: DebouncerOptions<TFn>,\n): (...args: Parameters<TFn>) => void {\n  const debouncer = new Debouncer(fn, initialOptions)\n  return debouncer.maybeExecute\n}\n"],"names":["Store","parseFunctionOrValue"],"mappings":";;;;AA2BA,SAAS,2BAEgB;AACvB,SAAO,gBAAgB;AAAA,IACrB,mBAAmB;AAAA,IACnB,gBAAgB;AAAA,IAChB,WAAW;AAAA,IACX,UAAU;AAAA,IACV,QAAQ;AAAA,EAAA,CACT;AACH;AAuCA,MAAM,iBAGF;AAAA,EACF,SAAS;AAAA,EACT,SAAS;AAAA,EACT,UAAU;AAAA,EACV,MAAM;AACR;AAiCO,MAAM,UAAmC;AAAA,EAO9C,YACU,IACR,gBACA;AAFQ,SAAA,KAAA;AAPV,SAAS,QAA8C,IAAIA,MAAAA;AAAAA,MACzD,yBAAA;AAAA,IAA8B;AAmBhC,SAAA,aAAa,CAAC,eAAqD;AACjE,WAAK,UAAU,EAAE,GAAG,KAAK,SAAS,GAAG,WAAA;AAGrC,UAAI,CAAC,KAAK,eAAe;AACvB,aAAK,OAAA;AAAA,MAAO;AAAA,IACd;AAGF,SAAA,YAAY,CAAC,aAAiD;AAC5D,WAAK,MAAM,SAAS,CAAC,UAAU;AAC7B,cAAM,gBAAgB;AAAA,UACpB,GAAG;AAAA,UACH,GAAG;AAAA,QAAA;AAEL,cAAM,EAAE,cAAc;AACtB,eAAO;AAAA,UACL,GAAG;AAAA,UACH,QAAQ,CAAC,KAAK,gBACV,aACA,YACE,YACA;AAAA,QAAA;AAAA,MACR,CACD;AAAA,IAAA;AAMH,SAAA,cAAc,MAAe;AAC3B,aAAO,CAAC,CAACC,MAAAA,qBAAqB,KAAK,QAAQ,SAAS,IAAI;AAAA,IAAA;AAM1D,SAAA,WAAW,MAAc;AACvB,aAAOA,MAAAA,qBAAqB,KAAK,QAAQ,MAAM,IAAI;AAAA,IAAA;AAOrD,SAAA,eAAe,IAAI,SAAgC;AACjD,UAAI,CAAC,KAAK,YAAA,EAAe,QAAO;AAChC,UAAI,qBAAqB;AAGzB,UAAI,KAAK,QAAQ,WAAW,KAAK,MAAM,MAAM,mBAAmB;AAC9D,aAAK,UAAU,EAAE,mBAAmB,MAAA,CAAO;AAC3C,6BAAqB;AACrB,aAAK,SAAS,GAAG,IAAI;AAAA,MAAA;AAIvB,UAAI,KAAK,QAAQ,UAAU;AACzB,aAAK,UAAU,EAAE,WAAW,MAAM,UAAU,MAAM;AAAA,MAAA;AAIpD,UAAI,KAAK,WAAY,cAAa,KAAK,UAAU;AAGjD,WAAK,aAAa,WAAW,MAAM;AACjC,aAAK,UAAU,EAAE,mBAAmB,KAAA,CAAM;AAC1C,YAAI,KAAK,QAAQ,YAAY,CAAC,oBAAoB;AAChD,eAAK,SAAS,GAAG,IAAI;AAAA,QAAA;AAAA,MACvB,GACC,KAAK,UAAU;AAAA,IAAA;AAGpB,SAAA,WAAW,IAAI,SAAgC;AAC7C,UAAI,CAAC,KAAK,YAAA,EAAe,QAAO;AAChC,WAAK,GAAG,GAAG,IAAI;AACf,WAAK,UAAU;AAAA,QACb,gBAAgB,KAAK,MAAM,MAAM,iBAAiB;AAAA,QAClD,WAAW;AAAA,QACX,UAAU;AAAA,MAAA,CACX;AACD,WAAK,QAAQ,YAAY,IAAI;AAAA,IAAA;AAM/B,SAAA,QAAQ,MAAY;AAClB,UAAI,KAAK,MAAM,MAAM,aAAa,KAAK,MAAM,MAAM,UAAU;AAC3D,aAAK,cAAA;AACL,aAAK,SAAS,GAAG,KAAK,MAAM,MAAM,QAAQ;AAAA,MAAA;AAAA,IAC5C;AAGF,SAAA,gBAAgB,MAAY;AAC1B,UAAI,KAAK,YAAY;AACnB,qBAAa,KAAK,UAAU;AAC5B,aAAK,aAAa;AAAA,MAAA;AAAA,IACpB;AAMF,SAAA,SAAS,MAAY;AACnB,WAAK,cAAA;AACL,WAAK,UAAU;AAAA,QACb,mBAAmB;AAAA,QACnB,WAAW;AAAA,MAAA,CACZ;AAAA,IAAA;AAMH,SAAA,QAAQ,MAAY;AAClB,WAAK,UAAU,0BAA+B;AAAA,IAAA;AA9H9C,SAAK,UAAU;AAAA,MACb,GAAG;AAAA,MACH,GAAG;AAAA,IAAA;AAEL,SAAK,UAAU,KAAK,QAAQ,gBAAgB,CAAA,CAAE;AAAA,EAAA;AAAA,EAVhD;AAAA,EAyBA;AAAA,EAqBA;AAAA,EAOA;AAAA,EAoCA;AAAA,EAqBA;AAwBF;AA8BO,SAAS,SACd,IACA,gBACoC;AACpC,QAAM,YAAY,IAAI,UAAU,IAAI,cAAc;AAClD,SAAO,UAAU;AACnB;;;"}

dist/cjs/throttler.cjs

@@ -89,2 +89,7 @@ "use strict";
       this.options.onExecute?.(this);
+      setTimeout(() => {
+        if (!this.store.state.isPending) {
+          this.#setState({ nextExecutionTime: void 0 });
+        }
+      }, this.#getWait());
     };
@@ -91,0 +96,0 @@ this.flush = () => {

dist/cjs/throttler.cjs.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"throttler.cjs","sources":["../../src/throttler.ts"],"sourcesContent":["import { Store } from '@tanstack/store'\nimport { parseFunctionOrValue } from './utils'\nimport type { AnyFunction } from './types'\n\nexport interface ThrottlerState<TFn extends AnyFunction> {\n  /**\n   * Number of function executions that have been completed\n   */\n  executionCount: number\n  /**\n   * Whether the throttler is waiting for the timeout to trigger execution\n   */\n  isPending: boolean\n  /**\n   * The arguments from the most recent call to maybeExecute\n   */\n  lastArgs: Parameters<TFn> | undefined\n  /**\n   * Timestamp of the last function execution in milliseconds\n   */\n  lastExecutionTime: number\n  /**\n   * Timestamp when the next execution can occur in milliseconds\n   */\n  nextExecutionTime: number\n  /**\n   * Current execution status - 'idle' when not active, 'pending' when waiting for timeout\n   */\n  status: 'disabled' | 'idle' | 'pending'\n}\n\nfunction getDefaultThrottlerState<\n  TFn extends AnyFunction,\n>(): ThrottlerState<TFn> {\n  return structuredClone({\n    executionCount: 0,\n    isPending: false,\n    lastArgs: undefined,\n    lastExecutionTime: 0,\n    nextExecutionTime: 0,\n    status: 'idle',\n  })\n}\n\n/**\n * Options for configuring a throttled function\n */\nexport interface ThrottlerOptions<TFn extends AnyFunction> {\n  /**\n   * Whether the throttler is enabled. When disabled, maybeExecute will not trigger any executions.\n   * Can be a boolean or a function that returns a boolean.\n   * Defaults to true.\n   */\n  enabled?: boolean | ((throttler: Throttler<TFn>) => boolean)\n  /**\n   * Initial state for the throttler\n   */\n  initialState?: Partial<ThrottlerState<TFn>>\n  /**\n   * Whether to execute on the leading edge of the timeout.\n   * Defaults to true.\n   */\n  leading?: boolean\n  /**\n   * Callback function that is called after the function is executed\n   */\n  onExecute?: (throttler: Throttler<TFn>) => void\n  /**\n   * Whether to execute on the trailing edge of the timeout.\n   * Defaults to true.\n   */\n  trailing?: boolean\n  /**\n   * Time window in milliseconds during which the function can only be executed once.\n   * Can be a number or a function that returns a number.\n   * Defaults to 0ms\n   */\n  wait: number | ((throttler: Throttler<TFn>) => number)\n}\n\nconst defaultOptions: Omit<\n  Required<ThrottlerOptions<any>>,\n  'initialState' | 'onExecute'\n> = {\n  enabled: true,\n  leading: true,\n  trailing: true,\n  wait: 0,\n}\n\n/**\n * A class that creates a throttled function.\n *\n * Throttling ensures a function is called at most once within a specified time window.\n * Unlike debouncing which waits for a pause in calls, throttling guarantees consistent\n * execution timing regardless of call frequency.\n *\n * Supports both leading and trailing edge execution:\n * - Leading: Execute immediately on first call (default: true)\n * - Trailing: Execute after wait period if called during throttle (default: true)\n *\n * For collapsing rapid-fire events where you only care about the last call, consider using Debouncer.\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the throttler\n * - Use `onExecute` callback to react to function execution and implement custom logic\n * - The state includes execution count, last execution time, pending status, and more\n * - State can be accessed via `throttler.store.state` when using the class directly\n * - When using framework adapters (React/Solid), state is accessed from `throttler.state`\n *\n * @example\n * ```ts\n * const throttler = new Throttler(\n *   (id: string) => api.getData(id),\n *   { wait: 1000 } // Execute at most once per second\n * );\n *\n * // First call executes immediately\n * throttler.maybeExecute('123');\n *\n * // Subsequent calls within 1000ms are throttled\n * throttler.maybeExecute('123'); // Throttled\n * ```\n */\nexport class Throttler<TFn extends AnyFunction> {\n  readonly store: Store<Readonly<ThrottlerState<TFn>>> = new Store(\n    getDefaultThrottlerState(),\n  )\n  options: ThrottlerOptions<TFn>\n  #timeoutId: NodeJS.Timeout | undefined\n\n  constructor(\n    private fn: TFn,\n    initialOptions: ThrottlerOptions<TFn>,\n  ) {\n    this.options = {\n      ...defaultOptions,\n      ...initialOptions,\n    }\n    this.#setState(this.options.initialState ?? {})\n  }\n\n  /**\n   * Updates the throttler options\n   */\n  setOptions = (newOptions: Partial<ThrottlerOptions<TFn>>): void => {\n    this.options = { ...this.options, ...newOptions }\n\n    // Cancel pending execution if the throttler is disabled\n    if (!this.#getEnabled()) {\n      this.cancel()\n    }\n  }\n\n  #setState = (newState: Partial<ThrottlerState<TFn>>): void => {\n    this.store.setState((state) => {\n      const combinedState = {\n        ...state,\n        ...newState,\n      }\n      const { isPending } = combinedState\n      return {\n        ...combinedState,\n        status: !this.#getEnabled()\n          ? 'disabled'\n          : isPending\n            ? 'pending'\n            : 'idle',\n      }\n    })\n  }\n\n  #getEnabled = (): boolean => {\n    return !!parseFunctionOrValue(this.options.enabled, this)\n  }\n\n  #getWait = (): number => {\n    return parseFunctionOrValue(this.options.wait, this)\n  }\n\n  /**\n   * Attempts to execute the throttled function. The execution behavior depends on the throttler options:\n   *\n   * - If enough time has passed since the last execution (>= wait period):\n   *   - With leading=true: Executes immediately\n   *   - With leading=false: Waits for the next trailing execution\n   *\n   * - If within the wait period:\n   *   - With trailing=true: Schedules execution for end of wait period\n   *   - With trailing=false: Drops the execution\n   *\n   * @example\n   * ```ts\n   * const throttled = new Throttler(fn, { wait: 1000 });\n   *\n   * // First call executes immediately\n   * throttled.maybeExecute('a', 'b');\n   *\n   * // Call during wait period - gets throttled\n   * throttled.maybeExecute('c', 'd');\n   * ```\n   */\n  maybeExecute = (...args: Parameters<TFn>): void => {\n    const now = Date.now()\n    const timeSinceLastExecution = now - this.store.state.lastExecutionTime\n    const wait = this.#getWait()\n\n    // Handle leading execution\n    if (this.options.leading && timeSinceLastExecution >= wait) {\n      this.#execute(...args)\n    } else {\n      // Store the most recent arguments for potential trailing execution\n      this.#setState({\n        lastArgs: args,\n      })\n      // Set up trailing execution if not already scheduled\n      if (!this.#timeoutId && this.options.trailing) {\n        // prevent large number if lastExecutionTime is undefined\n        const _timeSinceLastExecution = this.store.state.lastExecutionTime\n          ? now - this.store.state.lastExecutionTime\n          : 0\n        const timeoutDuration = wait - _timeSinceLastExecution\n        this.#setState({ isPending: true })\n        this.#timeoutId = setTimeout(() => {\n          const { lastArgs } = this.store.state\n          if (lastArgs !== undefined) {\n            this.#execute(...lastArgs)\n          }\n        }, timeoutDuration)\n      }\n    }\n  }\n\n  #execute = (...args: Parameters<TFn>): void => {\n    if (!this.#getEnabled()) return\n    this.fn(...args) // EXECUTE!\n    const lastExecutionTime = Date.now()\n    const nextExecutionTime = lastExecutionTime + this.#getWait()\n    this.#clearTimeout()\n    this.#setState({\n      executionCount: this.store.state.executionCount + 1,\n      lastExecutionTime,\n      nextExecutionTime,\n      isPending: false,\n      lastArgs: undefined,\n    })\n    this.options.onExecute?.(this)\n  }\n\n  /**\n   * Processes the current pending execution immediately\n   */\n  flush = (): void => {\n    if (this.store.state.isPending && this.store.state.lastArgs) {\n      this.#execute(...this.store.state.lastArgs)\n    }\n  }\n\n  #clearTimeout = (): void => {\n    if (this.#timeoutId) {\n      clearTimeout(this.#timeoutId)\n      this.#timeoutId = undefined\n    }\n  }\n\n  /**\n   * Cancels any pending trailing execution and clears internal state.\n   *\n   * If a trailing execution is scheduled (due to throttling with trailing=true),\n   * this will prevent that execution from occurring. The internal timeout and\n   * stored arguments will be cleared.\n   *\n   * Has no effect if there is no pending execution.\n   */\n  cancel = (): void => {\n    this.#clearTimeout()\n    this.#setState({\n      lastArgs: undefined,\n      isPending: false,\n    })\n  }\n\n  /**\n   * Resets the throttler state to its default values\n   */\n  reset = (): void => {\n    this.#setState(getDefaultThrottlerState<TFn>())\n  }\n}\n\n/**\n * Creates a throttled function that limits how often the provided function can execute.\n *\n * Throttling ensures a function executes at most once within a specified time window,\n * regardless of how many times it is called. This is useful for rate-limiting\n * expensive operations or UI updates.\n *\n * The throttled function can be configured to execute on the leading and/or trailing\n * edge of the throttle window via options.\n *\n * For handling bursts of events, consider using debounce() instead. For hard execution\n * limits, consider using rateLimit().\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the throttler\n * - Use `onExecute` callback to react to function execution and implement custom logic\n * - The state includes execution count, last execution time, pending status, and more\n * - State can be accessed via the underlying Throttler instance's `store.state` property\n * - When using framework adapters (React/Solid), state is accessed from the hook's state property\n *\n * @example\n * ```ts\n * // Basic throttling - max once per second\n * const throttled = throttle(updateUI, { wait: 1000 });\n *\n * // Configure leading/trailing execution\n * const throttled = throttle(saveData, {\n *   wait: 2000,\n *   leading: true,  // Execute immediately on first call\n *   trailing: true  // Execute again after delay if called during wait\n * });\n * ```\n */\nexport function throttle<TFn extends AnyFunction>(\n  fn: TFn,\n  initialOptions: ThrottlerOptions<TFn>,\n) {\n  const throttler = new Throttler(fn, initialOptions)\n  return throttler.maybeExecute\n}\n"],"names":["Store","parseFunctionOrValue"],"mappings":";;;;AA+BA,SAAS,2BAEgB;AACvB,SAAO,gBAAgB;AAAA,IACrB,gBAAgB;AAAA,IAChB,WAAW;AAAA,IACX,UAAU;AAAA,IACV,mBAAmB;AAAA,IACnB,mBAAmB;AAAA,IACnB,QAAQ;AAAA,EAAA,CACT;AACH;AAsCA,MAAM,iBAGF;AAAA,EACF,SAAS;AAAA,EACT,SAAS;AAAA,EACT,UAAU;AAAA,EACV,MAAM;AACR;AAqCO,MAAM,UAAmC;AAAA,EAO9C,YACU,IACR,gBACA;AAFQ,SAAA,KAAA;AAPV,SAAS,QAA8C,IAAIA,MAAAA;AAAAA,MACzD,yBAAA;AAAA,IAAyB;AAmB3B,SAAA,aAAa,CAAC,eAAqD;AACjE,WAAK,UAAU,EAAE,GAAG,KAAK,SAAS,GAAG,WAAA;AAGrC,UAAI,CAAC,KAAK,eAAe;AACvB,aAAK,OAAA;AAAA,MAAO;AAAA,IACd;AAGF,SAAA,YAAY,CAAC,aAAiD;AAC5D,WAAK,MAAM,SAAS,CAAC,UAAU;AAC7B,cAAM,gBAAgB;AAAA,UACpB,GAAG;AAAA,UACH,GAAG;AAAA,QAAA;AAEL,cAAM,EAAE,cAAc;AACtB,eAAO;AAAA,UACL,GAAG;AAAA,UACH,QAAQ,CAAC,KAAK,gBACV,aACA,YACE,YACA;AAAA,QAAA;AAAA,MACR,CACD;AAAA,IAAA;AAGH,SAAA,cAAc,MAAe;AAC3B,aAAO,CAAC,CAACC,MAAAA,qBAAqB,KAAK,QAAQ,SAAS,IAAI;AAAA,IAAA;AAG1D,SAAA,WAAW,MAAc;AACvB,aAAOA,MAAAA,qBAAqB,KAAK,QAAQ,MAAM,IAAI;AAAA,IAAA;AAyBrD,SAAA,eAAe,IAAI,SAAgC;AACjD,YAAM,MAAM,KAAK,IAAA;AACjB,YAAM,yBAAyB,MAAM,KAAK,MAAM,MAAM;AACtD,YAAM,OAAO,KAAK,SAAA;AAGlB,UAAI,KAAK,QAAQ,WAAW,0BAA0B,MAAM;AAC1D,aAAK,SAAS,GAAG,IAAI;AAAA,MAAA,OAChB;AAEL,aAAK,UAAU;AAAA,UACb,UAAU;AAAA,QAAA,CACX;AAED,YAAI,CAAC,KAAK,cAAc,KAAK,QAAQ,UAAU;AAE7C,gBAAM,0BAA0B,KAAK,MAAM,MAAM,oBAC7C,MAAM,KAAK,MAAM,MAAM,oBACvB;AACJ,gBAAM,kBAAkB,OAAO;AAC/B,eAAK,UAAU,EAAE,WAAW,KAAA,CAAM;AAClC,eAAK,aAAa,WAAW,MAAM;AACjC,kBAAM,EAAE,SAAA,IAAa,KAAK,MAAM;AAChC,gBAAI,aAAa,QAAW;AAC1B,mBAAK,SAAS,GAAG,QAAQ;AAAA,YAAA;AAAA,UAC3B,GACC,eAAe;AAAA,QAAA;AAAA,MACpB;AAAA,IACF;AAGF,SAAA,WAAW,IAAI,SAAgC;AAC7C,UAAI,CAAC,KAAK,cAAe;AACzB,WAAK,GAAG,GAAG,IAAI;AACf,YAAM,oBAAoB,KAAK,IAAA;AAC/B,YAAM,oBAAoB,oBAAoB,KAAK,SAAA;AACnD,WAAK,cAAA;AACL,WAAK,UAAU;AAAA,QACb,gBAAgB,KAAK,MAAM,MAAM,iBAAiB;AAAA,QAClD;AAAA,QACA;AAAA,QACA,WAAW;AAAA,QACX,UAAU;AAAA,MAAA,CACX;AACD,WAAK,QAAQ,YAAY,IAAI;AAAA,IAAA;AAM/B,SAAA,QAAQ,MAAY;AAClB,UAAI,KAAK,MAAM,MAAM,aAAa,KAAK,MAAM,MAAM,UAAU;AAC3D,aAAK,SAAS,GAAG,KAAK,MAAM,MAAM,QAAQ;AAAA,MAAA;AAAA,IAC5C;AAGF,SAAA,gBAAgB,MAAY;AAC1B,UAAI,KAAK,YAAY;AACnB,qBAAa,KAAK,UAAU;AAC5B,aAAK,aAAa;AAAA,MAAA;AAAA,IACpB;AAYF,SAAA,SAAS,MAAY;AACnB,WAAK,cAAA;AACL,WAAK,UAAU;AAAA,QACb,UAAU;AAAA,QACV,WAAW;AAAA,MAAA,CACZ;AAAA,IAAA;AAMH,SAAA,QAAQ,MAAY;AAClB,WAAK,UAAU,0BAA+B;AAAA,IAAA;AAvJ9C,SAAK,UAAU;AAAA,MACb,GAAG;AAAA,MACH,GAAG;AAAA,IAAA;AAEL,SAAK,UAAU,KAAK,QAAQ,gBAAgB,CAAA,CAAE;AAAA,EAAA;AAAA,EAVhD;AAAA,EAyBA;AAAA,EAkBA;AAAA,EAIA;AAAA,EAyDA;AAAA,EAyBA;AA8BF;AAoCO,SAAS,SACd,IACA,gBACA;AACA,QAAM,YAAY,IAAI,UAAU,IAAI,cAAc;AAClD,SAAO,UAAU;AACnB;;;"}
+{"version":3,"file":"throttler.cjs","sources":["../../src/throttler.ts"],"sourcesContent":["import { Store } from '@tanstack/store'\nimport { parseFunctionOrValue } from './utils'\nimport type { AnyFunction } from './types'\n\nexport interface ThrottlerState<TFn extends AnyFunction> {\n  /**\n   * Number of function executions that have been completed\n   */\n  executionCount: number\n  /**\n   * Whether the throttler is waiting for the timeout to trigger execution\n   */\n  isPending: boolean\n  /**\n   * The arguments from the most recent call to maybeExecute\n   */\n  lastArgs: Parameters<TFn> | undefined\n  /**\n   * Timestamp of the last function execution in milliseconds\n   */\n  lastExecutionTime: number\n  /**\n   * Timestamp when the next execution can occur in milliseconds\n   */\n  nextExecutionTime: number | undefined\n  /**\n   * Current execution status - 'idle' when not active, 'pending' when waiting for timeout\n   */\n  status: 'disabled' | 'idle' | 'pending'\n}\n\nfunction getDefaultThrottlerState<\n  TFn extends AnyFunction,\n>(): ThrottlerState<TFn> {\n  return structuredClone({\n    executionCount: 0,\n    isPending: false,\n    lastArgs: undefined,\n    lastExecutionTime: 0,\n    nextExecutionTime: 0,\n    status: 'idle',\n  })\n}\n\n/**\n * Options for configuring a throttled function\n */\nexport interface ThrottlerOptions<TFn extends AnyFunction> {\n  /**\n   * Whether the throttler is enabled. When disabled, maybeExecute will not trigger any executions.\n   * Can be a boolean or a function that returns a boolean.\n   * Defaults to true.\n   */\n  enabled?: boolean | ((throttler: Throttler<TFn>) => boolean)\n  /**\n   * Initial state for the throttler\n   */\n  initialState?: Partial<ThrottlerState<TFn>>\n  /**\n   * Whether to execute on the leading edge of the timeout.\n   * Defaults to true.\n   */\n  leading?: boolean\n  /**\n   * Callback function that is called after the function is executed\n   */\n  onExecute?: (throttler: Throttler<TFn>) => void\n  /**\n   * Whether to execute on the trailing edge of the timeout.\n   * Defaults to true.\n   */\n  trailing?: boolean\n  /**\n   * Time window in milliseconds during which the function can only be executed once.\n   * Can be a number or a function that returns a number.\n   * Defaults to 0ms\n   */\n  wait: number | ((throttler: Throttler<TFn>) => number)\n}\n\nconst defaultOptions: Omit<\n  Required<ThrottlerOptions<any>>,\n  'initialState' | 'onExecute'\n> = {\n  enabled: true,\n  leading: true,\n  trailing: true,\n  wait: 0,\n}\n\n/**\n * A class that creates a throttled function.\n *\n * Throttling ensures a function is called at most once within a specified time window.\n * Unlike debouncing which waits for a pause in calls, throttling guarantees consistent\n * execution timing regardless of call frequency.\n *\n * Supports both leading and trailing edge execution:\n * - Leading: Execute immediately on first call (default: true)\n * - Trailing: Execute after wait period if called during throttle (default: true)\n *\n * For collapsing rapid-fire events where you only care about the last call, consider using Debouncer.\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the throttler\n * - Use `onExecute` callback to react to function execution and implement custom logic\n * - The state includes execution count, last execution time, pending status, and more\n * - State can be accessed via `throttler.store.state` when using the class directly\n * - When using framework adapters (React/Solid), state is accessed from `throttler.state`\n *\n * @example\n * ```ts\n * const throttler = new Throttler(\n *   (id: string) => api.getData(id),\n *   { wait: 1000 } // Execute at most once per second\n * );\n *\n * // First call executes immediately\n * throttler.maybeExecute('123');\n *\n * // Subsequent calls within 1000ms are throttled\n * throttler.maybeExecute('123'); // Throttled\n * ```\n */\nexport class Throttler<TFn extends AnyFunction> {\n  readonly store: Store<Readonly<ThrottlerState<TFn>>> = new Store(\n    getDefaultThrottlerState(),\n  )\n  options: ThrottlerOptions<TFn>\n  #timeoutId: NodeJS.Timeout | undefined\n\n  constructor(\n    private fn: TFn,\n    initialOptions: ThrottlerOptions<TFn>,\n  ) {\n    this.options = {\n      ...defaultOptions,\n      ...initialOptions,\n    }\n    this.#setState(this.options.initialState ?? {})\n  }\n\n  /**\n   * Updates the throttler options\n   */\n  setOptions = (newOptions: Partial<ThrottlerOptions<TFn>>): void => {\n    this.options = { ...this.options, ...newOptions }\n\n    // Cancel pending execution if the throttler is disabled\n    if (!this.#getEnabled()) {\n      this.cancel()\n    }\n  }\n\n  #setState = (newState: Partial<ThrottlerState<TFn>>): void => {\n    this.store.setState((state) => {\n      const combinedState = {\n        ...state,\n        ...newState,\n      }\n      const { isPending } = combinedState\n      return {\n        ...combinedState,\n        status: !this.#getEnabled()\n          ? 'disabled'\n          : isPending\n            ? 'pending'\n            : 'idle',\n      }\n    })\n  }\n\n  #getEnabled = (): boolean => {\n    return !!parseFunctionOrValue(this.options.enabled, this)\n  }\n\n  #getWait = (): number => {\n    return parseFunctionOrValue(this.options.wait, this)\n  }\n\n  /**\n   * Attempts to execute the throttled function. The execution behavior depends on the throttler options:\n   *\n   * - If enough time has passed since the last execution (>= wait period):\n   *   - With leading=true: Executes immediately\n   *   - With leading=false: Waits for the next trailing execution\n   *\n   * - If within the wait period:\n   *   - With trailing=true: Schedules execution for end of wait period\n   *   - With trailing=false: Drops the execution\n   *\n   * @example\n   * ```ts\n   * const throttled = new Throttler(fn, { wait: 1000 });\n   *\n   * // First call executes immediately\n   * throttled.maybeExecute('a', 'b');\n   *\n   * // Call during wait period - gets throttled\n   * throttled.maybeExecute('c', 'd');\n   * ```\n   */\n  maybeExecute = (...args: Parameters<TFn>): void => {\n    const now = Date.now()\n    const timeSinceLastExecution = now - this.store.state.lastExecutionTime\n    const wait = this.#getWait()\n\n    // Handle leading execution\n    if (this.options.leading && timeSinceLastExecution >= wait) {\n      this.#execute(...args)\n    } else {\n      // Store the most recent arguments for potential trailing execution\n      this.#setState({\n        lastArgs: args,\n      })\n      // Set up trailing execution if not already scheduled\n      if (!this.#timeoutId && this.options.trailing) {\n        // prevent large number if lastExecutionTime is undefined\n        const _timeSinceLastExecution = this.store.state.lastExecutionTime\n          ? now - this.store.state.lastExecutionTime\n          : 0\n        const timeoutDuration = wait - _timeSinceLastExecution\n        this.#setState({ isPending: true })\n        this.#timeoutId = setTimeout(() => {\n          const { lastArgs } = this.store.state\n          if (lastArgs !== undefined) {\n            this.#execute(...lastArgs)\n          }\n        }, timeoutDuration)\n      }\n    }\n  }\n\n  #execute = (...args: Parameters<TFn>): void => {\n    if (!this.#getEnabled()) return\n    this.fn(...args) // EXECUTE!\n    const lastExecutionTime = Date.now()\n    const nextExecutionTime = lastExecutionTime + this.#getWait()\n    this.#clearTimeout()\n    this.#setState({\n      executionCount: this.store.state.executionCount + 1,\n      lastExecutionTime,\n      nextExecutionTime,\n      isPending: false,\n      lastArgs: undefined,\n    })\n    this.options.onExecute?.(this)\n    setTimeout(() => {\n      if (!this.store.state.isPending) {\n        this.#setState({ nextExecutionTime: undefined })\n      }\n    }, this.#getWait())\n  }\n\n  /**\n   * Processes the current pending execution immediately\n   */\n  flush = (): void => {\n    if (this.store.state.isPending && this.store.state.lastArgs) {\n      this.#execute(...this.store.state.lastArgs)\n    }\n  }\n\n  #clearTimeout = (): void => {\n    if (this.#timeoutId) {\n      clearTimeout(this.#timeoutId)\n      this.#timeoutId = undefined\n    }\n  }\n\n  /**\n   * Cancels any pending trailing execution and clears internal state.\n   *\n   * If a trailing execution is scheduled (due to throttling with trailing=true),\n   * this will prevent that execution from occurring. The internal timeout and\n   * stored arguments will be cleared.\n   *\n   * Has no effect if there is no pending execution.\n   */\n  cancel = (): void => {\n    this.#clearTimeout()\n    this.#setState({\n      lastArgs: undefined,\n      isPending: false,\n    })\n  }\n\n  /**\n   * Resets the throttler state to its default values\n   */\n  reset = (): void => {\n    this.#setState(getDefaultThrottlerState<TFn>())\n  }\n}\n\n/**\n * Creates a throttled function that limits how often the provided function can execute.\n *\n * Throttling ensures a function executes at most once within a specified time window,\n * regardless of how many times it is called. This is useful for rate-limiting\n * expensive operations or UI updates.\n *\n * The throttled function can be configured to execute on the leading and/or trailing\n * edge of the throttle window via options.\n *\n * For handling bursts of events, consider using debounce() instead. For hard execution\n * limits, consider using rateLimit().\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the throttler\n * - Use `onExecute` callback to react to function execution and implement custom logic\n * - The state includes execution count, last execution time, pending status, and more\n * - State can be accessed via the underlying Throttler instance's `store.state` property\n * - When using framework adapters (React/Solid), state is accessed from the hook's state property\n *\n * @example\n * ```ts\n * // Basic throttling - max once per second\n * const throttled = throttle(updateUI, { wait: 1000 });\n *\n * // Configure leading/trailing execution\n * const throttled = throttle(saveData, {\n *   wait: 2000,\n *   leading: true,  // Execute immediately on first call\n *   trailing: true  // Execute again after delay if called during wait\n * });\n * ```\n */\nexport function throttle<TFn extends AnyFunction>(\n  fn: TFn,\n  initialOptions: ThrottlerOptions<TFn>,\n) {\n  const throttler = new Throttler(fn, initialOptions)\n  return throttler.maybeExecute\n}\n"],"names":["Store","parseFunctionOrValue"],"mappings":";;;;AA+BA,SAAS,2BAEgB;AACvB,SAAO,gBAAgB;AAAA,IACrB,gBAAgB;AAAA,IAChB,WAAW;AAAA,IACX,UAAU;AAAA,IACV,mBAAmB;AAAA,IACnB,mBAAmB;AAAA,IACnB,QAAQ;AAAA,EAAA,CACT;AACH;AAsCA,MAAM,iBAGF;AAAA,EACF,SAAS;AAAA,EACT,SAAS;AAAA,EACT,UAAU;AAAA,EACV,MAAM;AACR;AAqCO,MAAM,UAAmC;AAAA,EAO9C,YACU,IACR,gBACA;AAFQ,SAAA,KAAA;AAPV,SAAS,QAA8C,IAAIA,MAAAA;AAAAA,MACzD,yBAAA;AAAA,IAAyB;AAmB3B,SAAA,aAAa,CAAC,eAAqD;AACjE,WAAK,UAAU,EAAE,GAAG,KAAK,SAAS,GAAG,WAAA;AAGrC,UAAI,CAAC,KAAK,eAAe;AACvB,aAAK,OAAA;AAAA,MAAO;AAAA,IACd;AAGF,SAAA,YAAY,CAAC,aAAiD;AAC5D,WAAK,MAAM,SAAS,CAAC,UAAU;AAC7B,cAAM,gBAAgB;AAAA,UACpB,GAAG;AAAA,UACH,GAAG;AAAA,QAAA;AAEL,cAAM,EAAE,cAAc;AACtB,eAAO;AAAA,UACL,GAAG;AAAA,UACH,QAAQ,CAAC,KAAK,gBACV,aACA,YACE,YACA;AAAA,QAAA;AAAA,MACR,CACD;AAAA,IAAA;AAGH,SAAA,cAAc,MAAe;AAC3B,aAAO,CAAC,CAACC,MAAAA,qBAAqB,KAAK,QAAQ,SAAS,IAAI;AAAA,IAAA;AAG1D,SAAA,WAAW,MAAc;AACvB,aAAOA,MAAAA,qBAAqB,KAAK,QAAQ,MAAM,IAAI;AAAA,IAAA;AAyBrD,SAAA,eAAe,IAAI,SAAgC;AACjD,YAAM,MAAM,KAAK,IAAA;AACjB,YAAM,yBAAyB,MAAM,KAAK,MAAM,MAAM;AACtD,YAAM,OAAO,KAAK,SAAA;AAGlB,UAAI,KAAK,QAAQ,WAAW,0BAA0B,MAAM;AAC1D,aAAK,SAAS,GAAG,IAAI;AAAA,MAAA,OAChB;AAEL,aAAK,UAAU;AAAA,UACb,UAAU;AAAA,QAAA,CACX;AAED,YAAI,CAAC,KAAK,cAAc,KAAK,QAAQ,UAAU;AAE7C,gBAAM,0BAA0B,KAAK,MAAM,MAAM,oBAC7C,MAAM,KAAK,MAAM,MAAM,oBACvB;AACJ,gBAAM,kBAAkB,OAAO;AAC/B,eAAK,UAAU,EAAE,WAAW,KAAA,CAAM;AAClC,eAAK,aAAa,WAAW,MAAM;AACjC,kBAAM,EAAE,SAAA,IAAa,KAAK,MAAM;AAChC,gBAAI,aAAa,QAAW;AAC1B,mBAAK,SAAS,GAAG,QAAQ;AAAA,YAAA;AAAA,UAC3B,GACC,eAAe;AAAA,QAAA;AAAA,MACpB;AAAA,IACF;AAGF,SAAA,WAAW,IAAI,SAAgC;AAC7C,UAAI,CAAC,KAAK,cAAe;AACzB,WAAK,GAAG,GAAG,IAAI;AACf,YAAM,oBAAoB,KAAK,IAAA;AAC/B,YAAM,oBAAoB,oBAAoB,KAAK,SAAA;AACnD,WAAK,cAAA;AACL,WAAK,UAAU;AAAA,QACb,gBAAgB,KAAK,MAAM,MAAM,iBAAiB;AAAA,QAClD;AAAA,QACA;AAAA,QACA,WAAW;AAAA,QACX,UAAU;AAAA,MAAA,CACX;AACD,WAAK,QAAQ,YAAY,IAAI;AAC7B,iBAAW,MAAM;AACf,YAAI,CAAC,KAAK,MAAM,MAAM,WAAW;AAC/B,eAAK,UAAU,EAAE,mBAAmB,OAAA,CAAW;AAAA,QAAA;AAAA,MACjD,GACC,KAAK,UAAU;AAAA,IAAA;AAMpB,SAAA,QAAQ,MAAY;AAClB,UAAI,KAAK,MAAM,MAAM,aAAa,KAAK,MAAM,MAAM,UAAU;AAC3D,aAAK,SAAS,GAAG,KAAK,MAAM,MAAM,QAAQ;AAAA,MAAA;AAAA,IAC5C;AAGF,SAAA,gBAAgB,MAAY;AAC1B,UAAI,KAAK,YAAY;AACnB,qBAAa,KAAK,UAAU;AAC5B,aAAK,aAAa;AAAA,MAAA;AAAA,IACpB;AAYF,SAAA,SAAS,MAAY;AACnB,WAAK,cAAA;AACL,WAAK,UAAU;AAAA,QACb,UAAU;AAAA,QACV,WAAW;AAAA,MAAA,CACZ;AAAA,IAAA;AAMH,SAAA,QAAQ,MAAY;AAClB,WAAK,UAAU,0BAA+B;AAAA,IAAA;AA5J9C,SAAK,UAAU;AAAA,MACb,GAAG;AAAA,MACH,GAAG;AAAA,IAAA;AAEL,SAAK,UAAU,KAAK,QAAQ,gBAAgB,CAAA,CAAE;AAAA,EAAA;AAAA,EAVhD;AAAA,EAyBA;AAAA,EAkBA;AAAA,EAIA;AAAA,EAyDA;AAAA,EA8BA;AA8BF;AAoCO,SAAS,SACd,IACA,gBACA;AACA,QAAM,YAAY,IAAI,UAAU,IAAI,cAAc;AAClD,SAAO,UAAU;AACnB;;;"}

dist/cjs/throttler.d.cts

@@ -23,3 +23,3 @@ import { Store } from '@tanstack/store';
      */
-    nextExecutionTime: number;
+    nextExecutionTime: number | undefined;
     /**
@@ -26,0 +26,0 @@ * Current execution status - 'idle' when not active, 'pending' when waiting for timeout

dist/esm/async-debouncer.js

@@ -103,2 +103,3 @@ import { Store } from "@tanstack/store";
           isPending: false,
+          lastArgs: void 0,
           settleCount: this.store.state.settleCount + 1
@@ -105,0 +106,0 @@ });

dist/esm/async-debouncer.js.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"async-debouncer.js","sources":["../../src/async-debouncer.ts"],"sourcesContent":["import { Store } from '@tanstack/store'\nimport { parseFunctionOrValue } from './utils'\nimport type { AnyAsyncFunction, OptionalKeys } from './types'\n\nexport interface AsyncDebouncerState<TFn extends AnyAsyncFunction> {\n  /**\n   * Whether the debouncer can execute on the leading edge of the timeout\n   */\n  canLeadingExecute: boolean\n  /**\n   * Number of function executions that have resulted in errors\n   */\n  errorCount: number\n  /**\n   * Whether the debounced function is currently executing asynchronously\n   */\n  isExecuting: boolean\n  /**\n   * Whether the debouncer is waiting for the timeout to trigger execution\n   */\n  isPending: boolean\n  /**\n   * The arguments from the most recent call to maybeExecute\n   */\n  lastArgs: Parameters<TFn> | undefined\n  /**\n   * The result from the most recent successful function execution\n   */\n  lastResult: ReturnType<TFn> | undefined\n  /**\n   * Number of function executions that have completed (either successfully or with errors)\n   */\n  settleCount: number\n  /**\n   * Current execution status - 'idle' when not active, 'pending' when waiting, 'executing' when running, 'settled' when completed\n   */\n  status: 'disabled' | 'idle' | 'pending' | 'executing' | 'settled'\n  /**\n   * Number of function executions that have completed successfully\n   */\n  successCount: number\n}\n\nfunction getDefaultAsyncDebouncerState<\n  TFn extends AnyAsyncFunction,\n>(): AsyncDebouncerState<TFn> {\n  return structuredClone({\n    canLeadingExecute: true,\n    errorCount: 0,\n    isExecuting: false,\n    isPending: false,\n    lastArgs: undefined,\n    lastResult: undefined,\n    settleCount: 0,\n    successCount: 0,\n    status: 'idle',\n  })\n}\n\n/**\n * Options for configuring an async debounced function\n */\nexport interface AsyncDebouncerOptions<TFn extends AnyAsyncFunction> {\n  /**\n   * Whether the debouncer is enabled. When disabled, maybeExecute will not trigger any executions.\n   * Can be a boolean or a function that returns a boolean.\n   * Defaults to true.\n   */\n  enabled?: boolean | ((debouncer: AsyncDebouncer<TFn>) => boolean)\n  /**\n   * Initial state for the async debouncer\n   */\n  initialState?: Partial<AsyncDebouncerState<TFn>>\n  /**\n   * Whether to execute on the leading edge of the timeout.\n   * Defaults to false.\n   */\n  leading?: boolean\n  /**\n   * Optional error handler for when the debounced function throws.\n   * If provided, the handler will be called with the error and debouncer instance.\n   * This can be used alongside throwOnError - the handler will be called before any error is thrown.\n   */\n  onError?: (error: unknown, debouncer: AsyncDebouncer<TFn>) => void\n  /**\n   * Optional callback to call when the debounced function is executed\n   */\n  onSettled?: (debouncer: AsyncDebouncer<TFn>) => void\n  /**\n   * Optional callback to call when the debounced function is executed\n   */\n  onSuccess?: (result: ReturnType<TFn>, debouncer: AsyncDebouncer<TFn>) => void\n  /**\n   * Whether to throw errors when they occur.\n   * Defaults to true if no onError handler is provided, false if an onError handler is provided.\n   * Can be explicitly set to override these defaults.\n   */\n  throwOnError?: boolean\n  /**\n   * Whether to execute on the trailing edge of the timeout.\n   * Defaults to true.\n   */\n  trailing?: boolean\n  /**\n   * Delay in milliseconds to wait after the last call before executing.\n   * Can be a number or a function that returns a number.\n   * Defaults to 0ms\n   */\n  wait: number | ((debouncer: AsyncDebouncer<TFn>) => number)\n}\n\ntype AsyncDebouncerOptionsWithOptionalCallbacks = OptionalKeys<\n  AsyncDebouncerOptions<any>,\n  'initialState' | 'onError' | 'onSettled' | 'onSuccess'\n>\n\nconst defaultOptions: AsyncDebouncerOptionsWithOptionalCallbacks = {\n  enabled: true,\n  leading: false,\n  trailing: true,\n  wait: 0,\n}\n\n/**\n * A class that creates an async debounced function.\n *\n * Debouncing ensures that a function is only executed after a specified delay has passed since its last invocation.\n * Each new invocation resets the delay timer. This is useful for handling frequent events like window resizing\n * or input changes where you only want to execute the handler after the events have stopped occurring.\n *\n * Unlike throttling which allows execution at regular intervals, debouncing prevents any execution until\n * the function stops being called for the specified delay period.\n *\n * Unlike the non-async Debouncer, this async version supports returning values from the debounced function,\n * making it ideal for API calls and other async operations where you want the result of the `maybeExecute` call\n * instead of setting the result on a state variable from within the debounced function.\n *\n * Error Handling:\n * - If an `onError` handler is provided, it will be called with the error and debouncer instance\n * - If `throwOnError` is true (default when no onError handler is provided), the error will be thrown\n * - If `throwOnError` is false (default when onError handler is provided), the error will be swallowed\n * - Both onError and throwOnError can be used together - the handler will be called before any error is thrown\n * - The error state can be checked using the underlying store\n *\n * State Management:\n * - The debouncer uses a reactive store for state management\n * - Use `initialState` to provide initial state values when creating the async debouncer\n * - The state includes canLeadingExecute, error count, execution status, and success/settle counts\n * - State can be accessed via the `store` property and its `state` getter\n * - The store is reactive and will notify subscribers of state changes\n *\n * @example\n * ```ts\n * const asyncDebouncer = new AsyncDebouncer(async (value: string) => {\n *   const results = await searchAPI(value);\n *   return results; // Return value is preserved\n * }, {\n *   wait: 500,\n *   onError: (error) => {\n *     console.error('Search failed:', error);\n *   }\n * });\n *\n * // Called on each keystroke but only executes after 500ms of no typing\n * // Returns the API response directly\n * const results = await asyncDebouncer.maybeExecute(inputElement.value);\n * ```\n */\nexport class AsyncDebouncer<TFn extends AnyAsyncFunction> {\n  readonly store: Store<Readonly<AsyncDebouncerState<TFn>>> = new Store<\n    AsyncDebouncerState<TFn>\n  >(getDefaultAsyncDebouncerState<TFn>())\n  options: AsyncDebouncerOptions<TFn>\n  #abortController: AbortController | null = null\n  #timeoutId: NodeJS.Timeout | null = null\n  #resolvePreviousPromise:\n    | ((value?: ReturnType<TFn> | undefined) => void)\n    | null = null\n  #rejectPreviousPromise: ((reason?: unknown) => void) | null = null\n\n  constructor(\n    private fn: TFn,\n    initialOptions: AsyncDebouncerOptions<TFn>,\n  ) {\n    this.options = {\n      ...defaultOptions,\n      ...initialOptions,\n      throwOnError: initialOptions.throwOnError ?? !initialOptions.onError,\n    }\n    this.#setState(this.options.initialState ?? {})\n  }\n\n  /**\n   * Updates the async debouncer options\n   */\n  setOptions = (newOptions: Partial<AsyncDebouncerOptions<TFn>>): void => {\n    this.options = { ...this.options, ...newOptions }\n\n    // Cancel pending execution if the debouncer is disabled\n    if (!this.#getEnabled()) {\n      this.cancel()\n    }\n  }\n\n  #setState = (newState: Partial<AsyncDebouncerState<TFn>>): void => {\n    this.store.setState((state) => {\n      const combinedState = {\n        ...state,\n        ...newState,\n      }\n      const { isPending, isExecuting, settleCount } = combinedState\n      return {\n        ...combinedState,\n        status: !this.#getEnabled()\n          ? 'disabled'\n          : isPending\n            ? 'pending'\n            : isExecuting\n              ? 'executing'\n              : settleCount > 0\n                ? 'settled'\n                : 'idle',\n      }\n    })\n  }\n\n  /**\n   * Returns the current debouncer enabled state\n   */\n  #getEnabled = (): boolean => {\n    return !!parseFunctionOrValue(this.options.enabled, this)\n  }\n\n  /**\n   * Returns the current debouncer wait state\n   */\n  #getWait = (): number => {\n    return parseFunctionOrValue(this.options.wait, this)\n  }\n\n  /**\n   * Attempts to execute the debounced function.\n   * If a call is already in progress, it will be queued.\n   *\n   * Error Handling:\n   * - If the debounced function throws and no `onError` handler is configured,\n   *   the error will be thrown from this method.\n   * - If an `onError` handler is configured, errors will be caught and passed to the handler,\n   *   and this method will return undefined.\n   * - The error state can be checked using `getErrorCount()` and `getIsExecuting()`.\n   *\n   * @returns A promise that resolves with the function's return value, or undefined if an error occurred and was handled by onError\n   * @throws The error from the debounced function if no onError handler is configured\n   */\n  maybeExecute = async (\n    ...args: Parameters<TFn>\n  ): Promise<ReturnType<TFn> | undefined> => {\n    if (!this.#getEnabled()) return undefined\n    this.#cancelPendingExecution()\n    this.#setState({ lastArgs: args })\n\n    // Handle leading execution\n    if (this.options.leading && this.store.state.canLeadingExecute) {\n      this.#setState({ canLeadingExecute: false })\n      await this.#execute(...args)\n      return this.store.state.lastResult\n    }\n\n    // Handle trailing execution\n    if (this.options.trailing && this.#getEnabled()) {\n      this.#setState({ isPending: true })\n    }\n\n    return new Promise((resolve, reject) => {\n      this.#resolvePreviousPromise = resolve\n      this.#rejectPreviousPromise = reject\n      this.#timeoutId = setTimeout(async () => {\n        // Execute trailing if enabled\n        if (this.options.trailing && this.store.state.lastArgs) {\n          await this.#execute(...this.store.state.lastArgs)\n        }\n\n        // Reset state and resolve\n        this.#setState({ canLeadingExecute: true })\n        this.#resolvePreviousPromise = null\n        resolve(this.store.state.lastResult)\n      }, this.#getWait())\n    })\n  }\n\n  #execute = async (\n    ...args: Parameters<TFn>\n  ): Promise<ReturnType<TFn> | undefined> => {\n    if (!this.#getEnabled()) return undefined\n    this.#abortController = new AbortController()\n    try {\n      this.#setState({ isExecuting: true })\n      const result = await this.fn(...args) // EXECUTE!\n      this.#setState({\n        lastResult: result,\n        successCount: this.store.state.successCount + 1,\n      })\n      this.options.onSuccess?.(result, this)\n    } catch (error) {\n      this.#setState({\n        errorCount: this.store.state.errorCount + 1,\n      })\n      this.options.onError?.(error, this)\n      if (this.options.throwOnError) {\n        this.#rejectPreviousPromiseInternal(error)\n      }\n    } finally {\n      this.#setState({\n        isExecuting: false,\n        isPending: false,\n        settleCount: this.store.state.settleCount + 1,\n      })\n      this.#abortController = null\n      this.options.onSettled?.(this)\n    }\n    return this.store.state.lastResult\n  }\n\n  /**\n   * Processes the current pending execution immediately\n   */\n  flush = async (): Promise<ReturnType<TFn> | undefined> => {\n    if (this.store.state.isPending && this.store.state.lastArgs) {\n      this.#abortExecution() // abort any current execution\n      this.#clearTimeout() // clear any existing timeout\n      const result = await this.#execute(...this.store.state.lastArgs)\n\n      // Resolve any pending promise from maybeExecute\n      this.#resolvePreviousPromiseInternal()\n\n      return result\n    }\n    return undefined\n  }\n\n  #resolvePreviousPromiseInternal = (): void => {\n    if (this.#resolvePreviousPromise) {\n      this.#resolvePreviousPromise(this.store.state.lastResult)\n      this.#resolvePreviousPromise = null\n    }\n  }\n\n  #rejectPreviousPromiseInternal = (error: unknown): void => {\n    if (this.#rejectPreviousPromise) {\n      this.#rejectPreviousPromise(error)\n      this.#rejectPreviousPromise = null\n    }\n  }\n\n  #clearTimeout = (): void => {\n    if (this.#timeoutId) {\n      clearTimeout(this.#timeoutId)\n      this.#timeoutId = null\n    }\n  }\n\n  #cancelPendingExecution = (): void => {\n    this.#clearTimeout()\n    this.#resolvePreviousPromiseInternal()\n    this.#setState({\n      isPending: false,\n      isExecuting: false,\n      lastArgs: undefined,\n    })\n  }\n\n  #abortExecution = (): void => {\n    if (this.#abortController) {\n      this.#abortController.abort()\n      this.#abortController = null\n    }\n  }\n\n  /**\n   * Cancels any pending execution or aborts any execution in progress\n   */\n  cancel = (): void => {\n    this.#cancelPendingExecution()\n    this.#abortExecution()\n    this.#setState({ canLeadingExecute: true })\n  }\n\n  /**\n   * Resets the debouncer state to its default values\n   */\n  reset = (): void => {\n    this.#setState(getDefaultAsyncDebouncerState<TFn>())\n  }\n}\n\n/**\n * Creates an async debounced function that delays execution until after a specified wait time.\n * The debounced function will only execute once the wait period has elapsed without any new calls.\n * If called again during the wait period, the timer resets and a new wait period begins.\n *\n * Unlike the non-async Debouncer, this async version supports returning values from the debounced function,\n * making it ideal for API calls and other async operations where you want the result of the `maybeExecute` call\n * instead of setting the result on a state variable from within the debounced function.\n *\n * Error Handling:\n * - If an `onError` handler is provided, it will be called with the error and debouncer instance\n * - If `throwOnError` is true (default when no onError handler is provided), the error will be thrown\n * - If `throwOnError` is false (default when onError handler is provided), the error will be swallowed\n * - The error state can be checked using the underlying AsyncDebouncer instance\n * - Both onError and throwOnError can be used together - the handler will be called before any error is thrown\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the async debouncer\n * - Use `onSuccess` callback to react to successful function execution and implement custom logic\n * - Use `onError` callback to react to function execution errors and implement custom error handling\n * - Use `onSettled` callback to react to function execution completion (success or error) and implement custom logic\n * - The state includes canLeadingExecute, error count, execution status, and success/settle counts\n * - State can be accessed via `asyncDebouncer.store.state` when using the class directly\n * - When using framework adapters (React/Solid), state is accessed from `asyncDebouncer.state`\n *\n * @example\n * ```ts\n * const debounced = asyncDebounce(async (value: string) => {\n *   const result = await saveToAPI(value);\n *   return result; // Return value is preserved\n * }, {\n *   wait: 1000,\n *   onError: (error) => {\n *     console.error('API call failed:', error);\n *   },\n *   throwOnError: true // Will both log the error and throw it\n * });\n *\n * // Will only execute once, 1 second after the last call\n * // Returns the API response directly\n * const result = await debounced(\"third\");\n * ```\n */\nexport function asyncDebounce<TFn extends AnyAsyncFunction>(\n  fn: TFn,\n  initialOptions: AsyncDebouncerOptions<TFn>,\n) {\n  const asyncDebouncer = new AsyncDebouncer(fn, initialOptions)\n  return 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+{"version":3,"file":"async-debouncer.js","sources":["../../src/async-debouncer.ts"],"sourcesContent":["import { Store } from '@tanstack/store'\nimport { parseFunctionOrValue } from './utils'\nimport type { AnyAsyncFunction, OptionalKeys } from './types'\n\nexport interface AsyncDebouncerState<TFn extends AnyAsyncFunction> {\n  /**\n   * Whether the debouncer can execute on the leading edge of the timeout\n   */\n  canLeadingExecute: boolean\n  /**\n   * Number of function executions that have resulted in errors\n   */\n  errorCount: number\n  /**\n   * Whether the debounced function is currently executing asynchronously\n   */\n  isExecuting: boolean\n  /**\n   * Whether the debouncer is waiting for the timeout to trigger execution\n   */\n  isPending: boolean\n  /**\n   * The arguments from the most recent call to maybeExecute\n   */\n  lastArgs: Parameters<TFn> | undefined\n  /**\n   * The result from the most recent successful function execution\n   */\n  lastResult: ReturnType<TFn> | undefined\n  /**\n   * Number of function executions that have completed (either successfully or with errors)\n   */\n  settleCount: number\n  /**\n   * Current execution status - 'idle' when not active, 'pending' when waiting, 'executing' when running, 'settled' when completed\n   */\n  status: 'disabled' | 'idle' | 'pending' | 'executing' | 'settled'\n  /**\n   * Number of function executions that have completed successfully\n   */\n  successCount: number\n}\n\nfunction getDefaultAsyncDebouncerState<\n  TFn extends AnyAsyncFunction,\n>(): AsyncDebouncerState<TFn> {\n  return structuredClone({\n    canLeadingExecute: true,\n    errorCount: 0,\n    isExecuting: false,\n    isPending: false,\n    lastArgs: undefined,\n    lastResult: undefined,\n    settleCount: 0,\n    successCount: 0,\n    status: 'idle',\n  })\n}\n\n/**\n * Options for configuring an async debounced function\n */\nexport interface AsyncDebouncerOptions<TFn extends AnyAsyncFunction> {\n  /**\n   * Whether the debouncer is enabled. When disabled, maybeExecute will not trigger any executions.\n   * Can be a boolean or a function that returns a boolean.\n   * Defaults to true.\n   */\n  enabled?: boolean | ((debouncer: AsyncDebouncer<TFn>) => boolean)\n  /**\n   * Initial state for the async debouncer\n   */\n  initialState?: Partial<AsyncDebouncerState<TFn>>\n  /**\n   * Whether to execute on the leading edge of the timeout.\n   * Defaults to false.\n   */\n  leading?: boolean\n  /**\n   * Optional error handler for when the debounced function throws.\n   * If provided, the handler will be called with the error and debouncer instance.\n   * This can be used alongside throwOnError - the handler will be called before any error is thrown.\n   */\n  onError?: (error: unknown, debouncer: AsyncDebouncer<TFn>) => void\n  /**\n   * Optional callback to call when the debounced function is executed\n   */\n  onSettled?: (debouncer: AsyncDebouncer<TFn>) => void\n  /**\n   * Optional callback to call when the debounced function is executed\n   */\n  onSuccess?: (result: ReturnType<TFn>, debouncer: AsyncDebouncer<TFn>) => void\n  /**\n   * Whether to throw errors when they occur.\n   * Defaults to true if no onError handler is provided, false if an onError handler is provided.\n   * Can be explicitly set to override these defaults.\n   */\n  throwOnError?: boolean\n  /**\n   * Whether to execute on the trailing edge of the timeout.\n   * Defaults to true.\n   */\n  trailing?: boolean\n  /**\n   * Delay in milliseconds to wait after the last call before executing.\n   * Can be a number or a function that returns a number.\n   * Defaults to 0ms\n   */\n  wait: number | ((debouncer: AsyncDebouncer<TFn>) => number)\n}\n\ntype AsyncDebouncerOptionsWithOptionalCallbacks = OptionalKeys<\n  AsyncDebouncerOptions<any>,\n  'initialState' | 'onError' | 'onSettled' | 'onSuccess'\n>\n\nconst defaultOptions: AsyncDebouncerOptionsWithOptionalCallbacks = {\n  enabled: true,\n  leading: false,\n  trailing: true,\n  wait: 0,\n}\n\n/**\n * A class that creates an async debounced function.\n *\n * Debouncing ensures that a function is only executed after a specified delay has passed since its last invocation.\n * Each new invocation resets the delay timer. This is useful for handling frequent events like window resizing\n * or input changes where you only want to execute the handler after the events have stopped occurring.\n *\n * Unlike throttling which allows execution at regular intervals, debouncing prevents any execution until\n * the function stops being called for the specified delay period.\n *\n * Unlike the non-async Debouncer, this async version supports returning values from the debounced function,\n * making it ideal for API calls and other async operations where you want the result of the `maybeExecute` call\n * instead of setting the result on a state variable from within the debounced function.\n *\n * Error Handling:\n * - If an `onError` handler is provided, it will be called with the error and debouncer instance\n * - If `throwOnError` is true (default when no onError handler is provided), the error will be thrown\n * - If `throwOnError` is false (default when onError handler is provided), the error will be swallowed\n * - Both onError and throwOnError can be used together - the handler will be called before any error is thrown\n * - The error state can be checked using the underlying store\n *\n * State Management:\n * - The debouncer uses a reactive store for state management\n * - Use `initialState` to provide initial state values when creating the async debouncer\n * - The state includes canLeadingExecute, error count, execution status, and success/settle counts\n * - State can be accessed via the `store` property and its `state` getter\n * - The store is reactive and will notify subscribers of state changes\n *\n * @example\n * ```ts\n * const asyncDebouncer = new AsyncDebouncer(async (value: string) => {\n *   const results = await searchAPI(value);\n *   return results; // Return value is preserved\n * }, {\n *   wait: 500,\n *   onError: (error) => {\n *     console.error('Search failed:', error);\n *   }\n * });\n *\n * // Called on each keystroke but only executes after 500ms of no typing\n * // Returns the API response directly\n * const results = await asyncDebouncer.maybeExecute(inputElement.value);\n * ```\n */\nexport class AsyncDebouncer<TFn extends AnyAsyncFunction> {\n  readonly store: Store<Readonly<AsyncDebouncerState<TFn>>> = new Store<\n    AsyncDebouncerState<TFn>\n  >(getDefaultAsyncDebouncerState<TFn>())\n  options: AsyncDebouncerOptions<TFn>\n  #abortController: AbortController | null = null\n  #timeoutId: NodeJS.Timeout | null = null\n  #resolvePreviousPromise:\n    | ((value?: ReturnType<TFn> | undefined) => void)\n    | null = null\n  #rejectPreviousPromise: ((reason?: unknown) => void) | null = null\n\n  constructor(\n    private fn: TFn,\n    initialOptions: AsyncDebouncerOptions<TFn>,\n  ) {\n    this.options = {\n      ...defaultOptions,\n      ...initialOptions,\n      throwOnError: initialOptions.throwOnError ?? !initialOptions.onError,\n    }\n    this.#setState(this.options.initialState ?? {})\n  }\n\n  /**\n   * Updates the async debouncer options\n   */\n  setOptions = (newOptions: Partial<AsyncDebouncerOptions<TFn>>): void => {\n    this.options = { ...this.options, ...newOptions }\n\n    // Cancel pending execution if the debouncer is disabled\n    if (!this.#getEnabled()) {\n      this.cancel()\n    }\n  }\n\n  #setState = (newState: Partial<AsyncDebouncerState<TFn>>): void => {\n    this.store.setState((state) => {\n      const combinedState = {\n        ...state,\n        ...newState,\n      }\n      const { isPending, isExecuting, settleCount } = combinedState\n      return {\n        ...combinedState,\n        status: !this.#getEnabled()\n          ? 'disabled'\n          : isPending\n            ? 'pending'\n            : isExecuting\n              ? 'executing'\n              : settleCount > 0\n                ? 'settled'\n                : 'idle',\n      }\n    })\n  }\n\n  /**\n   * Returns the current debouncer enabled state\n   */\n  #getEnabled = (): boolean => {\n    return !!parseFunctionOrValue(this.options.enabled, this)\n  }\n\n  /**\n   * Returns the current debouncer wait state\n   */\n  #getWait = (): number => {\n    return parseFunctionOrValue(this.options.wait, this)\n  }\n\n  /**\n   * Attempts to execute the debounced function.\n   * If a call is already in progress, it will be queued.\n   *\n   * Error Handling:\n   * - If the debounced function throws and no `onError` handler is configured,\n   *   the error will be thrown from this method.\n   * - If an `onError` handler is configured, errors will be caught and passed to the handler,\n   *   and this method will return undefined.\n   * - The error state can be checked using `getErrorCount()` and `getIsExecuting()`.\n   *\n   * @returns A promise that resolves with the function's return value, or undefined if an error occurred and was handled by onError\n   * @throws The error from the debounced function if no onError handler is configured\n   */\n  maybeExecute = async (\n    ...args: Parameters<TFn>\n  ): Promise<ReturnType<TFn> | undefined> => {\n    if (!this.#getEnabled()) return undefined\n    this.#cancelPendingExecution()\n    this.#setState({ lastArgs: args })\n\n    // Handle leading execution\n    if (this.options.leading && this.store.state.canLeadingExecute) {\n      this.#setState({ canLeadingExecute: false })\n      await this.#execute(...args)\n      return this.store.state.lastResult\n    }\n\n    // Handle trailing execution\n    if (this.options.trailing && this.#getEnabled()) {\n      this.#setState({ isPending: true })\n    }\n\n    return new Promise((resolve, reject) => {\n      this.#resolvePreviousPromise = resolve\n      this.#rejectPreviousPromise = reject\n      this.#timeoutId = setTimeout(async () => {\n        // Execute trailing if enabled\n        if (this.options.trailing && this.store.state.lastArgs) {\n          await this.#execute(...this.store.state.lastArgs)\n        }\n\n        // Reset state and resolve\n        this.#setState({ canLeadingExecute: true })\n        this.#resolvePreviousPromise = null\n        resolve(this.store.state.lastResult)\n      }, this.#getWait())\n    })\n  }\n\n  #execute = async (\n    ...args: Parameters<TFn>\n  ): Promise<ReturnType<TFn> | undefined> => {\n    if (!this.#getEnabled()) return undefined\n    this.#abortController = new AbortController()\n    try {\n      this.#setState({ isExecuting: true })\n      const result = await this.fn(...args) // EXECUTE!\n      this.#setState({\n        lastResult: result,\n        successCount: this.store.state.successCount + 1,\n      })\n      this.options.onSuccess?.(result, this)\n    } catch (error) {\n      this.#setState({\n        errorCount: this.store.state.errorCount + 1,\n      })\n      this.options.onError?.(error, this)\n      if (this.options.throwOnError) {\n        this.#rejectPreviousPromiseInternal(error)\n      }\n    } finally {\n      this.#setState({\n        isExecuting: false,\n        isPending: false,\n        lastArgs: undefined,\n        settleCount: this.store.state.settleCount + 1,\n      })\n      this.#abortController = null\n      this.options.onSettled?.(this)\n    }\n    return this.store.state.lastResult\n  }\n\n  /**\n   * Processes the current pending execution immediately\n   */\n  flush = async (): Promise<ReturnType<TFn> | undefined> => {\n    if (this.store.state.isPending && this.store.state.lastArgs) {\n      this.#abortExecution() // abort any current execution\n      this.#clearTimeout() // clear any existing timeout\n      const result = await this.#execute(...this.store.state.lastArgs)\n\n      // Resolve any pending promise from maybeExecute\n      this.#resolvePreviousPromiseInternal()\n\n      return result\n    }\n    return undefined\n  }\n\n  #resolvePreviousPromiseInternal = (): void => {\n    if (this.#resolvePreviousPromise) {\n      this.#resolvePreviousPromise(this.store.state.lastResult)\n      this.#resolvePreviousPromise = null\n    }\n  }\n\n  #rejectPreviousPromiseInternal = (error: unknown): void => {\n    if (this.#rejectPreviousPromise) {\n      this.#rejectPreviousPromise(error)\n      this.#rejectPreviousPromise = null\n    }\n  }\n\n  #clearTimeout = (): void => {\n    if (this.#timeoutId) {\n      clearTimeout(this.#timeoutId)\n      this.#timeoutId = null\n    }\n  }\n\n  #cancelPendingExecution = (): void => {\n    this.#clearTimeout()\n    this.#resolvePreviousPromiseInternal()\n    this.#setState({\n      isPending: false,\n      isExecuting: false,\n      lastArgs: undefined,\n    })\n  }\n\n  #abortExecution = (): void => {\n    if (this.#abortController) {\n      this.#abortController.abort()\n      this.#abortController = null\n    }\n  }\n\n  /**\n   * Cancels any pending execution or aborts any execution in progress\n   */\n  cancel = (): void => {\n    this.#cancelPendingExecution()\n    this.#abortExecution()\n    this.#setState({ canLeadingExecute: true })\n  }\n\n  /**\n   * Resets the debouncer state to its default values\n   */\n  reset = (): void => {\n    this.#setState(getDefaultAsyncDebouncerState<TFn>())\n  }\n}\n\n/**\n * Creates an async debounced function that delays execution until after a specified wait time.\n * The debounced function will only execute once the wait period has elapsed without any new calls.\n * If called again during the wait period, the timer resets and a new wait period begins.\n *\n * Unlike the non-async Debouncer, this async version supports returning values from the debounced function,\n * making it ideal for API calls and other async operations where you want the result of the `maybeExecute` call\n * instead of setting the result on a state variable from within the debounced function.\n *\n * Error Handling:\n * - If an `onError` handler is provided, it will be called with the error and debouncer instance\n * - If `throwOnError` is true (default when no onError handler is provided), the error will be thrown\n * - If `throwOnError` is false (default when onError handler is provided), the error will be swallowed\n * - The error state can be checked using the underlying AsyncDebouncer instance\n * - Both onError and throwOnError can be used together - the handler will be called before any error is thrown\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the async debouncer\n * - Use `onSuccess` callback to react to successful function execution and implement custom logic\n * - Use `onError` callback to react to function execution errors and implement custom error handling\n * - Use `onSettled` callback to react to function execution completion (success or error) and implement custom logic\n * - The state includes canLeadingExecute, error count, execution status, and success/settle counts\n * - State can be accessed via `asyncDebouncer.store.state` when using the class directly\n * - When using framework adapters (React/Solid), state is accessed from `asyncDebouncer.state`\n *\n * @example\n * ```ts\n * const debounced = asyncDebounce(async (value: string) => {\n *   const result = await saveToAPI(value);\n *   return result; // Return value is preserved\n * }, {\n *   wait: 1000,\n *   onError: (error) => {\n *     console.error('API call failed:', error);\n *   },\n *   throwOnError: true // Will both log the error and throw it\n * });\n *\n * // Will only execute once, 1 second after the last call\n * // Returns the API response directly\n * const result = await debounced(\"third\");\n * ```\n */\nexport function asyncDebounce<TFn extends AnyAsyncFunction>(\n  fn: TFn,\n  initialOptions: AsyncDebouncerOptions<TFn>,\n) {\n  const asyncDebouncer = new AsyncDebouncer(fn, initialOptions)\n  return 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dist/esm/async-throttler.d.ts

@@ -31,3 +31,3 @@ import { Store } from '@tanstack/store';
      */
-    nextExecutionTime: number;
+    nextExecutionTime: number | undefined;
     /**
@@ -34,0 +34,0 @@ * Number of function executions that have completed (either successfully or with errors)

dist/esm/async-throttler.js

@@ -11,3 +11,3 @@ import { Store } from "@tanstack/store";
     lastResult: void 0,
-    nextExecutionTime: 0,
+    nextExecutionTime: void 0,
     settleCount: 0,
@@ -118,2 +118,7 @@ status: "idle",
         this.options.onSettled?.(this);
+        setTimeout(() => {
+          if (!this.store.state.isPending) {
+            this.#setState({ nextExecutionTime: void 0 });
+          }
+        }, this.#getWait());
       }
@@ -120,0 +125,0 @@ return this.store.state.lastResult;

dist/esm/async-throttler.js.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"async-throttler.js","sources":["../../src/async-throttler.ts"],"sourcesContent":["import { Store } from '@tanstack/store'\nimport { parseFunctionOrValue } from './utils'\nimport type { AnyAsyncFunction, OptionalKeys } from './types'\n\nexport interface AsyncThrottlerState<TFn extends AnyAsyncFunction> {\n  /**\n   * Number of function executions that have resulted in errors\n   */\n  errorCount: number\n  /**\n   * Whether the throttled function is currently executing asynchronously\n   */\n  isExecuting: boolean\n  /**\n   * Whether the throttler is waiting for the timeout to trigger execution\n   */\n  isPending: boolean\n  /**\n   * The arguments from the most recent call to maybeExecute\n   */\n  lastArgs: Parameters<TFn> | undefined\n  /**\n   * Timestamp of the last function execution in milliseconds\n   */\n  lastExecutionTime: number\n  /**\n   * The result from the most recent successful function execution\n   */\n  lastResult: ReturnType<TFn> | undefined\n  /**\n   * Timestamp when the next execution can occur in milliseconds\n   */\n  nextExecutionTime: number\n  /**\n   * Number of function executions that have completed (either successfully or with errors)\n   */\n  settleCount: number\n  /**\n   * Current execution status - 'idle' when not active, 'pending' when waiting, 'executing' when running, 'settled' when completed\n   */\n  status: 'disabled' | 'idle' | 'pending' | 'executing' | 'settled'\n  /**\n   * Number of function executions that have completed successfully\n   */\n  successCount: number\n}\n\nfunction getDefaultAsyncThrottlerState<\n  TFn extends AnyAsyncFunction,\n>(): AsyncThrottlerState<TFn> {\n  return structuredClone({\n    errorCount: 0,\n    isExecuting: false,\n    isPending: false,\n    lastArgs: undefined,\n    lastExecutionTime: 0,\n    lastResult: undefined,\n    nextExecutionTime: 0,\n    settleCount: 0,\n    status: 'idle',\n    successCount: 0,\n  })\n}\n\n/**\n * Options for configuring an async throttled function\n */\nexport interface AsyncThrottlerOptions<TFn extends AnyAsyncFunction> {\n  /**\n   * Whether the throttler is enabled. When disabled, maybeExecute will not trigger any executions.\n   * Can be a boolean or a function that returns a boolean.\n   * Defaults to true.\n   */\n  enabled?: boolean | ((throttler: AsyncThrottler<TFn>) => boolean)\n  /**\n   * Initial state for the async throttler\n   */\n  initialState?: Partial<AsyncThrottlerState<TFn>>\n  /**\n   * Whether to execute the function immediately when called\n   * Defaults to true\n   */\n  leading?: boolean\n  /**\n   * Optional error handler for when the throttled function throws.\n   * If provided, the handler will be called with the error and throttler instance.\n   * This can be used alongside throwOnError - the handler will be called before any error is thrown.\n   */\n  onError?: (error: unknown, asyncThrottler: AsyncThrottler<TFn>) => void\n  /**\n   * Optional function to call when the throttled function is executed\n   */\n  onSettled?: (asyncThrottler: AsyncThrottler<TFn>) => void\n  /**\n   * Optional function to call when the throttled function is executed\n   */\n  onSuccess?: (\n    result: ReturnType<TFn>,\n    asyncThrottler: AsyncThrottler<TFn>,\n  ) => void\n  /**\n   * Whether to throw errors when they occur.\n   * Defaults to true if no onError handler is provided, false if an onError handler is provided.\n   * Can be explicitly set to override these defaults.\n   */\n  throwOnError?: boolean\n  /**\n   * Whether to execute the function on the trailing edge of the wait period\n   * Defaults to true\n   */\n  trailing?: boolean\n  /**\n   * Time window in milliseconds during which the function can only be executed once.\n   * Can be a number or a function that returns a number.\n   * Defaults to 0ms\n   */\n  wait: number | ((throttler: AsyncThrottler<TFn>) => number)\n}\n\ntype AsyncThrottlerOptionsWithOptionalCallbacks = OptionalKeys<\n  AsyncThrottlerOptions<any>,\n  'initialState' | 'onError' | 'onSettled' | 'onSuccess'\n>\n\nconst defaultOptions: AsyncThrottlerOptionsWithOptionalCallbacks = {\n  enabled: true,\n  leading: true,\n  trailing: true,\n  wait: 0,\n}\n\n/**\n * A class that creates an async throttled function.\n *\n * Throttling limits how often a function can be executed, allowing only one execution within a specified time window.\n * Unlike debouncing which resets the delay timer on each call, throttling ensures the function executes at a\n * regular interval regardless of how often it's called.\n *\n * Unlike the non-async Throttler, this async version supports returning values from the throttled function,\n * making it ideal for API calls and other async operations where you want the result of the `maybeExecute` call\n * instead of setting the result on a state variable from within the throttled function.\n *\n * This is useful for rate-limiting API calls, handling scroll/resize events, or any scenario where you want to\n * ensure a maximum execution frequency.\n *\n * Error Handling:\n * - If an `onError` handler is provided, it will be called with the error and throttler instance\n * - If `throwOnError` is true (default when no onError handler is provided), the error will be thrown\n * - If `throwOnError` is false (default when onError handler is provided), the error will be swallowed\n * - Both onError and throwOnError can be used together - the handler will be called before any error is thrown\n * - The error state can be checked using the underlying AsyncThrottler instance\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the async throttler\n * - Use `onSuccess` callback to react to successful function execution and implement custom logic\n * - Use `onError` callback to react to function execution errors and implement custom error handling\n * - Use `onSettled` callback to react to function execution completion (success or error) and implement custom logic\n * - The state includes error count, execution status, last execution time, and success/settle counts\n * - State can be accessed via `asyncThrottler.store.state` when using the class directly\n * - When using framework adapters (React/Solid), state is accessed from `asyncThrottler.state`\n *\n * @example\n * ```ts\n * const throttler = new AsyncThrottler(async (value: string) => {\n *   const result = await saveToAPI(value);\n *   return result; // Return value is preserved\n * }, {\n *   wait: 1000,\n *   onError: (error) => {\n *     console.error('API call failed:', error);\n *   }\n * });\n *\n * // Will only execute once per second no matter how often called\n * // Returns the API response directly\n * const result = await throttler.maybeExecute(inputElement.value);\n * ```\n */\nexport class AsyncThrottler<TFn extends AnyAsyncFunction> {\n  readonly store: Store<Readonly<AsyncThrottlerState<TFn>>> = new Store<\n    AsyncThrottlerState<TFn>\n  >(getDefaultAsyncThrottlerState<TFn>())\n  options: AsyncThrottlerOptions<TFn>\n  #abortController: AbortController | null = null\n  #timeoutId: NodeJS.Timeout | null = null\n  #resolvePreviousPromise:\n    | ((value?: ReturnType<TFn> | undefined) => void)\n    | null = null\n  #rejectPreviousPromise: ((reason?: unknown) => void) | null = null\n\n  constructor(\n    private fn: TFn,\n    initialOptions: AsyncThrottlerOptions<TFn>,\n  ) {\n    this.options = {\n      ...defaultOptions,\n      ...initialOptions,\n      throwOnError: initialOptions.throwOnError ?? !initialOptions.onError,\n    }\n    this.#setState(this.options.initialState ?? {})\n  }\n\n  /**\n   * Updates the async throttler options\n   */\n  setOptions = (newOptions: Partial<AsyncThrottlerOptions<TFn>>): void => {\n    this.options = { ...this.options, ...newOptions }\n\n    // End the pending state if the throttler is disabled\n    if (!this.#getEnabled()) {\n      this.cancel()\n    }\n  }\n\n  #setState = (newState: Partial<AsyncThrottlerState<TFn>>): void => {\n    this.store.setState((state) => {\n      const combinedState = {\n        ...state,\n        ...newState,\n      }\n      const { isPending, isExecuting, settleCount } = combinedState\n      return {\n        ...combinedState,\n        status: !this.#getEnabled()\n          ? 'disabled'\n          : isPending\n            ? 'pending'\n            : isExecuting\n              ? 'executing'\n              : settleCount > 0\n                ? 'settled'\n                : 'idle',\n      }\n    })\n  }\n\n  /**\n   * Returns the current enabled state of the async throttler\n   */\n  #getEnabled = (): boolean => {\n    return !!parseFunctionOrValue(this.options.enabled, this)\n  }\n\n  /**\n   * Returns the current wait time in milliseconds\n   */\n  #getWait = (): number => {\n    return parseFunctionOrValue(this.options.wait, this)\n  }\n\n  /**\n   * Attempts to execute the throttled function. The execution behavior depends on the throttler options:\n   *\n   * - If enough time has passed since the last execution (>= wait period):\n   *   - With leading=true: Executes immediately\n   *   - With leading=false: Waits for the next trailing execution\n   *\n   * - If within the wait period:\n   *   - With trailing=true: Schedules execution for end of wait period\n   *   - With trailing=false: Drops the execution\n   *\n   * @example\n   * ```ts\n   * const throttled = new AsyncThrottler(fn, { wait: 1000 });\n   *\n   * // First call executes immediately\n   * await throttled.maybeExecute('a', 'b');\n   *\n   * // Call during wait period - gets throttled\n   * await throttled.maybeExecute('c', 'd');\n   * ```\n   */\n  maybeExecute = async (\n    ...args: Parameters<TFn>\n  ): Promise<ReturnType<TFn> | undefined> => {\n    if (!this.#getEnabled()) return undefined\n    const now = Date.now()\n    const timeSinceLastExecution = now - this.store.state.lastExecutionTime\n    const wait = this.#getWait()\n    // Store the most recent arguments for potential trailing execution\n    this.#setState({ lastArgs: args })\n\n    this.#resolvePreviousPromiseInternal()\n\n    // Handle leading execution\n    if (this.options.leading && timeSinceLastExecution >= wait) {\n      await this.#execute(...args)\n      return this.store.state.lastResult\n    } else {\n      return new Promise((resolve, reject) => {\n        this.#resolvePreviousPromise = resolve\n        this.#rejectPreviousPromise = reject\n        // Clear any existing timeout to ensure we use the latest arguments\n        this.#clearTimeout()\n\n        // Set up trailing execution if enabled\n        if (this.options.trailing) {\n          const _timeSinceLastExecution = this.store.state.lastExecutionTime\n            ? now - this.store.state.lastExecutionTime\n            : 0\n          const timeoutDuration = wait - _timeSinceLastExecution\n          this.#setState({ isPending: true })\n          this.#timeoutId = setTimeout(async () => {\n            if (this.store.state.lastArgs !== undefined) {\n              await this.#execute(...this.store.state.lastArgs)\n            }\n            this.#resolvePreviousPromise = null\n            resolve(this.store.state.lastResult)\n          }, timeoutDuration)\n        }\n      })\n    }\n  }\n\n  #execute = async (\n    ...args: Parameters<TFn>\n  ): Promise<ReturnType<TFn> | undefined> => {\n    if (!this.#getEnabled() || this.store.state.isExecuting) return undefined\n    this.#abortController = new AbortController()\n    try {\n      this.#setState({ isExecuting: true })\n      const result = await this.fn(...args) // EXECUTE!\n      this.#setState({\n        lastResult: result,\n        successCount: this.store.state.successCount + 1,\n      })\n      this.options.onSuccess?.(result, this)\n    } catch (error) {\n      this.#setState({\n        errorCount: this.store.state.errorCount + 1,\n      })\n      this.options.onError?.(error, this)\n      if (this.options.throwOnError) {\n        this.#rejectPreviousPromiseInternal(error)\n      }\n    } finally {\n      const lastExecutionTime = Date.now()\n      const nextExecutionTime = lastExecutionTime + this.#getWait()\n      this.#setState({\n        isExecuting: false,\n        isPending: false,\n        settleCount: this.store.state.settleCount + 1,\n        lastExecutionTime,\n        nextExecutionTime,\n      })\n      this.#abortController = null\n      this.options.onSettled?.(this)\n    }\n    return this.store.state.lastResult\n  }\n\n  /**\n   * Processes the current pending execution immediately\n   */\n  flush = async (): Promise<ReturnType<TFn> | undefined> => {\n    if (this.store.state.isPending && this.store.state.lastArgs) {\n      this.#abortExecution() // abort any current execution\n      this.#clearTimeout() // clear any existing timeout\n      const result = await this.#execute(...this.store.state.lastArgs)\n\n      // Resolve any pending promise from maybeExecute\n      this.#resolvePreviousPromiseInternal()\n\n      return result\n    }\n    return undefined\n  }\n\n  #resolvePreviousPromiseInternal = (): void => {\n    if (this.#resolvePreviousPromise) {\n      this.#resolvePreviousPromise(this.store.state.lastResult)\n      this.#resolvePreviousPromise = null\n    }\n  }\n\n  #rejectPreviousPromiseInternal = (error: unknown): void => {\n    if (this.#rejectPreviousPromise) {\n      this.#rejectPreviousPromise(error)\n      this.#rejectPreviousPromise = null\n    }\n  }\n\n  #clearTimeout = (): void => {\n    if (this.#timeoutId) {\n      clearTimeout(this.#timeoutId)\n      this.#timeoutId = null\n    }\n  }\n\n  #cancelPendingExecution = (): void => {\n    this.#clearTimeout()\n    if (this.#resolvePreviousPromise) {\n      this.#resolvePreviousPromise(this.store.state.lastResult)\n      this.#resolvePreviousPromise = null\n    }\n    this.#setState({\n      isPending: false,\n      isExecuting: false,\n      lastArgs: undefined,\n    })\n  }\n\n  #abortExecution = (): void => {\n    if (this.#abortController) {\n      this.#abortController.abort()\n      this.#abortController = null\n    }\n  }\n\n  /**\n   * Cancels any pending execution or aborts any execution in progress\n   */\n  cancel = (): void => {\n    this.#cancelPendingExecution()\n    this.#abortExecution()\n  }\n\n  /**\n   * Resets the debouncer state to its default values\n   */\n  reset = (): void => {\n    this.#setState(getDefaultAsyncThrottlerState<TFn>())\n  }\n}\n\n/**\n * Creates an async throttled function that limits how often the function can execute.\n * The throttled function will execute at most once per wait period, even if called multiple times.\n * If called while executing, it will wait until execution completes before scheduling the next call.\n *\n * Unlike the non-async Throttler, this async version supports returning values from the throttled function,\n * making it ideal for API calls and other async operations where you want the result of the `maybeExecute` call\n * instead of setting the result on a state variable from within the throttled function.\n *\n * Error Handling:\n * - If an `onError` handler is provided, it will be called with the error and throttler instance\n * - If `throwOnError` is true (default when no onError handler is provided), the error will be thrown\n * - If `throwOnError` is false (default when onError handler is provided), the error will be swallowed\n * - Both onError and throwOnError can be used together - the handler will be called before any error is thrown\n * - The error state can be checked using the underlying AsyncThrottler instance\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the async throttler\n * - Use `onSuccess` callback to react to successful function execution and implement custom logic\n * - Use `onError` callback to react to function execution errors and implement custom error handling\n * - Use `onSettled` callback to react to function execution completion (success or error) and implement custom logic\n * - The state includes error count, execution status, last execution time, and success/settle counts\n * - State can be accessed via the underlying AsyncThrottler instance's `store.state` property\n * - When using framework adapters (React/Solid), state is accessed from the hook's state property\n *\n * @example\n * ```ts\n * const throttled = asyncThrottle(async (value: string) => {\n *   const result = await saveToAPI(value);\n *   return result; // Return value is preserved\n * }, {\n *   wait: 1000,\n *   onError: (error) => {\n *     console.error('API call failed:', error);\n *   }\n * });\n *\n * // This will execute at most once per second\n * // Returns the API response directly\n * const result = await throttled(inputElement.value);\n * ```\n */\nexport function asyncThrottle<TFn extends AnyAsyncFunction>(\n  fn: TFn,\n  initialOptions: AsyncThrottlerOptions<TFn>,\n) {\n  const asyncThrottler = new AsyncThrottler(fn, initialOptions)\n  return asyncThrottler.maybeExecute\n}\n"],"names":[],"mappings":";;AA+CA,SAAS,gCAEqB;AAC5B,SAAO,gBAAgB;AAAA,IACrB,YAAY;AAAA,IACZ,aAAa;AAAA,IACb,WAAW;AAAA,IACX,UAAU;AAAA,IACV,mBAAmB;AAAA,IACnB,YAAY;AAAA,IACZ,mBAAmB;AAAA,IACnB,aAAa;AAAA,IACb,QAAQ;AAAA,IACR,cAAc;AAAA,EAAA,CACf;AACH;AA8DA,MAAM,iBAA6D;AAAA,EACjE,SAAS;AAAA,EACT,SAAS;AAAA,EACT,UAAU;AAAA,EACV,MAAM;AACR;AAkDO,MAAM,eAA6C;AAAA,EAYxD,YACU,IACR,gBACA;AAFQ,SAAA,KAAA;AAZV,SAAS,QAAmD,IAAI,MAE9D,8BAAA,CAAoC;AAEtC,SAAA,mBAA2C;AAC3C,SAAA,aAAoC;AACpC,SAAA,0BAEW;AACX,SAAA,yBAA8D;AAiB9D,SAAA,aAAa,CAAC,eAA0D;AACtE,WAAK,UAAU,EAAE,GAAG,KAAK,SAAS,GAAG,WAAA;AAGrC,UAAI,CAAC,KAAK,eAAe;AACvB,aAAK,OAAA;AAAA,MAAO;AAAA,IACd;AAGF,SAAA,YAAY,CAAC,aAAsD;AACjE,WAAK,MAAM,SAAS,CAAC,UAAU;AAC7B,cAAM,gBAAgB;AAAA,UACpB,GAAG;AAAA,UACH,GAAG;AAAA,QAAA;AAEL,cAAM,EAAE,WAAW,aAAa,YAAA,IAAgB;AAChD,eAAO;AAAA,UACL,GAAG;AAAA,UACH,QAAQ,CAAC,KAAK,YAAA,IACV,aACA,YACE,YACA,cACE,cACA,cAAc,IACZ,YACA;AAAA,QAAA;AAAA,MACZ,CACD;AAAA,IAAA;AAMH,SAAA,cAAc,MAAe;AAC3B,aAAO,CAAC,CAAC,qBAAqB,KAAK,QAAQ,SAAS,IAAI;AAAA,IAAA;AAM1D,SAAA,WAAW,MAAc;AACvB,aAAO,qBAAqB,KAAK,QAAQ,MAAM,IAAI;AAAA,IAAA;AAyBrD,SAAA,eAAe,UACV,SACsC;AACzC,UAAI,CAAC,KAAK,YAAA,EAAe,QAAO;AAChC,YAAM,MAAM,KAAK,IAAA;AACjB,YAAM,yBAAyB,MAAM,KAAK,MAAM,MAAM;AACtD,YAAM,OAAO,KAAK,SAAA;AAElB,WAAK,UAAU,EAAE,UAAU,KAAA,CAAM;AAEjC,WAAK,gCAAA;AAGL,UAAI,KAAK,QAAQ,WAAW,0BAA0B,MAAM;AAC1D,cAAM,KAAK,SAAS,GAAG,IAAI;AAC3B,eAAO,KAAK,MAAM,MAAM;AAAA,MAAA,OACnB;AACL,eAAO,IAAI,QAAQ,CAAC,SAAS,WAAW;AACtC,eAAK,0BAA0B;AAC/B,eAAK,yBAAyB;AAE9B,eAAK,cAAA;AAGL,cAAI,KAAK,QAAQ,UAAU;AACzB,kBAAM,0BAA0B,KAAK,MAAM,MAAM,oBAC7C,MAAM,KAAK,MAAM,MAAM,oBACvB;AACJ,kBAAM,kBAAkB,OAAO;AAC/B,iBAAK,UAAU,EAAE,WAAW,KAAA,CAAM;AAClC,iBAAK,aAAa,WAAW,YAAY;AACvC,kBAAI,KAAK,MAAM,MAAM,aAAa,QAAW;AAC3C,sBAAM,KAAK,SAAS,GAAG,KAAK,MAAM,MAAM,QAAQ;AAAA,cAAA;AAElD,mBAAK,0BAA0B;AAC/B,sBAAQ,KAAK,MAAM,MAAM,UAAU;AAAA,YAAA,GAClC,eAAe;AAAA,UAAA;AAAA,QACpB,CACD;AAAA,MAAA;AAAA,IACH;AAGF,SAAA,WAAW,UACN,SACsC;AACzC,UAAI,CAAC,KAAK,iBAAiB,KAAK,MAAM,MAAM,YAAa,QAAO;AAChE,WAAK,mBAAmB,IAAI,gBAAA;AAC5B,UAAI;AACF,aAAK,UAAU,EAAE,aAAa,KAAA,CAAM;AACpC,cAAM,SAAS,MAAM,KAAK,GAAG,GAAG,IAAI;AACpC,aAAK,UAAU;AAAA,UACb,YAAY;AAAA,UACZ,cAAc,KAAK,MAAM,MAAM,eAAe;AAAA,QAAA,CAC/C;AACD,aAAK,QAAQ,YAAY,QAAQ,IAAI;AAAA,MAAA,SAC9B,OAAO;AACd,aAAK,UAAU;AAAA,UACb,YAAY,KAAK,MAAM,MAAM,aAAa;AAAA,QAAA,CAC3C;AACD,aAAK,QAAQ,UAAU,OAAO,IAAI;AAClC,YAAI,KAAK,QAAQ,cAAc;AAC7B,eAAK,+BAA+B,KAAK;AAAA,QAAA;AAAA,MAC3C,UACF;AACE,cAAM,oBAAoB,KAAK,IAAA;AAC/B,cAAM,oBAAoB,oBAAoB,KAAK,SAAA;AACnD,aAAK,UAAU;AAAA,UACb,aAAa;AAAA,UACb,WAAW;AAAA,UACX,aAAa,KAAK,MAAM,MAAM,cAAc;AAAA,UAC5C;AAAA,UACA;AAAA,QAAA,CACD;AACD,aAAK,mBAAmB;AACxB,aAAK,QAAQ,YAAY,IAAI;AAAA,MAAA;AAE/B,aAAO,KAAK,MAAM,MAAM;AAAA,IAAA;AAM1B,SAAA,QAAQ,YAAkD;AACxD,UAAI,KAAK,MAAM,MAAM,aAAa,KAAK,MAAM,MAAM,UAAU;AAC3D,aAAK,gBAAA;AACL,aAAK,cAAA;AACL,cAAM,SAAS,MAAM,KAAK,SAAS,GAAG,KAAK,MAAM,MAAM,QAAQ;AAG/D,aAAK,gCAAA;AAEL,eAAO;AAAA,MAAA;AAET,aAAO;AAAA,IAAA;AAGT,SAAA,kCAAkC,MAAY;AAC5C,UAAI,KAAK,yBAAyB;AAChC,aAAK,wBAAwB,KAAK,MAAM,MAAM,UAAU;AACxD,aAAK,0BAA0B;AAAA,MAAA;AAAA,IACjC;AAGF,SAAA,iCAAiC,CAAC,UAAyB;AACzD,UAAI,KAAK,wBAAwB;AAC/B,aAAK,uBAAuB,KAAK;AACjC,aAAK,yBAAyB;AAAA,MAAA;AAAA,IAChC;AAGF,SAAA,gBAAgB,MAAY;AAC1B,UAAI,KAAK,YAAY;AACnB,qBAAa,KAAK,UAAU;AAC5B,aAAK,aAAa;AAAA,MAAA;AAAA,IACpB;AAGF,SAAA,0BAA0B,MAAY;AACpC,WAAK,cAAA;AACL,UAAI,KAAK,yBAAyB;AAChC,aAAK,wBAAwB,KAAK,MAAM,MAAM,UAAU;AACxD,aAAK,0BAA0B;AAAA,MAAA;AAEjC,WAAK,UAAU;AAAA,QACb,WAAW;AAAA,QACX,aAAa;AAAA,QACb,UAAU;AAAA,MAAA,CACX;AAAA,IAAA;AAGH,SAAA,kBAAkB,MAAY;AAC5B,UAAI,KAAK,kBAAkB;AACzB,aAAK,iBAAiB,MAAA;AACtB,aAAK,mBAAmB;AAAA,MAAA;AAAA,IAC1B;AAMF,SAAA,SAAS,MAAY;AACnB,WAAK,wBAAA;AACL,WAAK,gBAAA;AAAA,IAAgB;AAMvB,SAAA,QAAQ,MAAY;AAClB,WAAK,UAAU,+BAAoC;AAAA,IAAA;AAnOnD,SAAK,UAAU;AAAA,MACb,GAAG;AAAA,MACH,GAAG;AAAA,MACH,cAAc,eAAe,gBAAgB,CAAC,eAAe;AAAA,IAAA;AAE/D,SAAK,UAAU,KAAK,QAAQ,gBAAgB,CAAA,CAAE;AAAA,EAAA;AAAA,EAhBhD;AAAA,EACA;AAAA,EACA;AAAA,EAGA;AAAA,EA0BA;AAAA,EAyBA;AAAA,EAOA;AAAA,EAoEA;AAAA,EAsDA;AAAA,EAOA;AAAA,EAOA;AAAA,EAOA;AAAA,EAaA;AAqBF;AA6CO,SAAS,cACd,IACA,gBACA;AACA,QAAM,iBAAiB,IAAI,eAAe,IAAI,cAAc;AAC5D,SAAO,eAAe;AACxB;"}
+{"version":3,"file":"async-throttler.js","sources":["../../src/async-throttler.ts"],"sourcesContent":["import { Store } from '@tanstack/store'\nimport { parseFunctionOrValue } from './utils'\nimport type { AnyAsyncFunction, OptionalKeys } from './types'\n\nexport interface AsyncThrottlerState<TFn extends AnyAsyncFunction> {\n  /**\n   * Number of function executions that have resulted in errors\n   */\n  errorCount: number\n  /**\n   * Whether the throttled function is currently executing asynchronously\n   */\n  isExecuting: boolean\n  /**\n   * Whether the throttler is waiting for the timeout to trigger execution\n   */\n  isPending: boolean\n  /**\n   * The arguments from the most recent call to maybeExecute\n   */\n  lastArgs: Parameters<TFn> | undefined\n  /**\n   * Timestamp of the last function execution in milliseconds\n   */\n  lastExecutionTime: number\n  /**\n   * The result from the most recent successful function execution\n   */\n  lastResult: ReturnType<TFn> | undefined\n  /**\n   * Timestamp when the next execution can occur in milliseconds\n   */\n  nextExecutionTime: number | undefined\n  /**\n   * Number of function executions that have completed (either successfully or with errors)\n   */\n  settleCount: number\n  /**\n   * Current execution status - 'idle' when not active, 'pending' when waiting, 'executing' when running, 'settled' when completed\n   */\n  status: 'disabled' | 'idle' | 'pending' | 'executing' | 'settled'\n  /**\n   * Number of function executions that have completed successfully\n   */\n  successCount: number\n}\n\nfunction getDefaultAsyncThrottlerState<\n  TFn extends AnyAsyncFunction,\n>(): AsyncThrottlerState<TFn> {\n  return structuredClone({\n    errorCount: 0,\n    isExecuting: false,\n    isPending: false,\n    lastArgs: undefined,\n    lastExecutionTime: 0,\n    lastResult: undefined,\n    nextExecutionTime: undefined,\n    settleCount: 0,\n    status: 'idle',\n    successCount: 0,\n  })\n}\n\n/**\n * Options for configuring an async throttled function\n */\nexport interface AsyncThrottlerOptions<TFn extends AnyAsyncFunction> {\n  /**\n   * Whether the throttler is enabled. When disabled, maybeExecute will not trigger any executions.\n   * Can be a boolean or a function that returns a boolean.\n   * Defaults to true.\n   */\n  enabled?: boolean | ((throttler: AsyncThrottler<TFn>) => boolean)\n  /**\n   * Initial state for the async throttler\n   */\n  initialState?: Partial<AsyncThrottlerState<TFn>>\n  /**\n   * Whether to execute the function immediately when called\n   * Defaults to true\n   */\n  leading?: boolean\n  /**\n   * Optional error handler for when the throttled function throws.\n   * If provided, the handler will be called with the error and throttler instance.\n   * This can be used alongside throwOnError - the handler will be called before any error is thrown.\n   */\n  onError?: (error: unknown, asyncThrottler: AsyncThrottler<TFn>) => void\n  /**\n   * Optional function to call when the throttled function is executed\n   */\n  onSettled?: (asyncThrottler: AsyncThrottler<TFn>) => void\n  /**\n   * Optional function to call when the throttled function is executed\n   */\n  onSuccess?: (\n    result: ReturnType<TFn>,\n    asyncThrottler: AsyncThrottler<TFn>,\n  ) => void\n  /**\n   * Whether to throw errors when they occur.\n   * Defaults to true if no onError handler is provided, false if an onError handler is provided.\n   * Can be explicitly set to override these defaults.\n   */\n  throwOnError?: boolean\n  /**\n   * Whether to execute the function on the trailing edge of the wait period\n   * Defaults to true\n   */\n  trailing?: boolean\n  /**\n   * Time window in milliseconds during which the function can only be executed once.\n   * Can be a number or a function that returns a number.\n   * Defaults to 0ms\n   */\n  wait: number | ((throttler: AsyncThrottler<TFn>) => number)\n}\n\ntype AsyncThrottlerOptionsWithOptionalCallbacks = OptionalKeys<\n  AsyncThrottlerOptions<any>,\n  'initialState' | 'onError' | 'onSettled' | 'onSuccess'\n>\n\nconst defaultOptions: AsyncThrottlerOptionsWithOptionalCallbacks = {\n  enabled: true,\n  leading: true,\n  trailing: true,\n  wait: 0,\n}\n\n/**\n * A class that creates an async throttled function.\n *\n * Throttling limits how often a function can be executed, allowing only one execution within a specified time window.\n * Unlike debouncing which resets the delay timer on each call, throttling ensures the function executes at a\n * regular interval regardless of how often it's called.\n *\n * Unlike the non-async Throttler, this async version supports returning values from the throttled function,\n * making it ideal for API calls and other async operations where you want the result of the `maybeExecute` call\n * instead of setting the result on a state variable from within the throttled function.\n *\n * This is useful for rate-limiting API calls, handling scroll/resize events, or any scenario where you want to\n * ensure a maximum execution frequency.\n *\n * Error Handling:\n * - If an `onError` handler is provided, it will be called with the error and throttler instance\n * - If `throwOnError` is true (default when no onError handler is provided), the error will be thrown\n * - If `throwOnError` is false (default when onError handler is provided), the error will be swallowed\n * - Both onError and throwOnError can be used together - the handler will be called before any error is thrown\n * - The error state can be checked using the underlying AsyncThrottler instance\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the async throttler\n * - Use `onSuccess` callback to react to successful function execution and implement custom logic\n * - Use `onError` callback to react to function execution errors and implement custom error handling\n * - Use `onSettled` callback to react to function execution completion (success or error) and implement custom logic\n * - The state includes error count, execution status, last execution time, and success/settle counts\n * - State can be accessed via `asyncThrottler.store.state` when using the class directly\n * - When using framework adapters (React/Solid), state is accessed from `asyncThrottler.state`\n *\n * @example\n * ```ts\n * const throttler = new AsyncThrottler(async (value: string) => {\n *   const result = await saveToAPI(value);\n *   return result; // Return value is preserved\n * }, {\n *   wait: 1000,\n *   onError: (error) => {\n *     console.error('API call failed:', error);\n *   }\n * });\n *\n * // Will only execute once per second no matter how often called\n * // Returns the API response directly\n * const result = await throttler.maybeExecute(inputElement.value);\n * ```\n */\nexport class AsyncThrottler<TFn extends AnyAsyncFunction> {\n  readonly store: Store<Readonly<AsyncThrottlerState<TFn>>> = new Store<\n    AsyncThrottlerState<TFn>\n  >(getDefaultAsyncThrottlerState<TFn>())\n  options: AsyncThrottlerOptions<TFn>\n  #abortController: AbortController | null = null\n  #timeoutId: NodeJS.Timeout | null = null\n  #resolvePreviousPromise:\n    | ((value?: ReturnType<TFn> | undefined) => void)\n    | null = null\n  #rejectPreviousPromise: ((reason?: unknown) => void) | null = null\n\n  constructor(\n    private fn: TFn,\n    initialOptions: AsyncThrottlerOptions<TFn>,\n  ) {\n    this.options = {\n      ...defaultOptions,\n      ...initialOptions,\n      throwOnError: initialOptions.throwOnError ?? !initialOptions.onError,\n    }\n    this.#setState(this.options.initialState ?? {})\n  }\n\n  /**\n   * Updates the async throttler options\n   */\n  setOptions = (newOptions: Partial<AsyncThrottlerOptions<TFn>>): void => {\n    this.options = { ...this.options, ...newOptions }\n\n    // End the pending state if the throttler is disabled\n    if (!this.#getEnabled()) {\n      this.cancel()\n    }\n  }\n\n  #setState = (newState: Partial<AsyncThrottlerState<TFn>>): void => {\n    this.store.setState((state) => {\n      const combinedState = {\n        ...state,\n        ...newState,\n      }\n      const { isPending, isExecuting, settleCount } = combinedState\n      return {\n        ...combinedState,\n        status: !this.#getEnabled()\n          ? 'disabled'\n          : isPending\n            ? 'pending'\n            : isExecuting\n              ? 'executing'\n              : settleCount > 0\n                ? 'settled'\n                : 'idle',\n      }\n    })\n  }\n\n  /**\n   * Returns the current enabled state of the async throttler\n   */\n  #getEnabled = (): boolean => {\n    return !!parseFunctionOrValue(this.options.enabled, this)\n  }\n\n  /**\n   * Returns the current wait time in milliseconds\n   */\n  #getWait = (): number => {\n    return parseFunctionOrValue(this.options.wait, this)\n  }\n\n  /**\n   * Attempts to execute the throttled function. The execution behavior depends on the throttler options:\n   *\n   * - If enough time has passed since the last execution (>= wait period):\n   *   - With leading=true: Executes immediately\n   *   - With leading=false: Waits for the next trailing execution\n   *\n   * - If within the wait period:\n   *   - With trailing=true: Schedules execution for end of wait period\n   *   - With trailing=false: Drops the execution\n   *\n   * @example\n   * ```ts\n   * const throttled = new AsyncThrottler(fn, { wait: 1000 });\n   *\n   * // First call executes immediately\n   * await throttled.maybeExecute('a', 'b');\n   *\n   * // Call during wait period - gets throttled\n   * await throttled.maybeExecute('c', 'd');\n   * ```\n   */\n  maybeExecute = async (\n    ...args: Parameters<TFn>\n  ): Promise<ReturnType<TFn> | undefined> => {\n    if (!this.#getEnabled()) return undefined\n    const now = Date.now()\n    const timeSinceLastExecution = now - this.store.state.lastExecutionTime\n    const wait = this.#getWait()\n    // Store the most recent arguments for potential trailing execution\n    this.#setState({ lastArgs: args })\n\n    this.#resolvePreviousPromiseInternal()\n\n    // Handle leading execution\n    if (this.options.leading && timeSinceLastExecution >= wait) {\n      await this.#execute(...args)\n      return this.store.state.lastResult\n    } else {\n      return new Promise((resolve, reject) => {\n        this.#resolvePreviousPromise = resolve\n        this.#rejectPreviousPromise = reject\n        // Clear any existing timeout to ensure we use the latest arguments\n        this.#clearTimeout()\n\n        // Set up trailing execution if enabled\n        if (this.options.trailing) {\n          const _timeSinceLastExecution = this.store.state.lastExecutionTime\n            ? now - this.store.state.lastExecutionTime\n            : 0\n          const timeoutDuration = wait - _timeSinceLastExecution\n          this.#setState({ isPending: true })\n          this.#timeoutId = setTimeout(async () => {\n            if (this.store.state.lastArgs !== undefined) {\n              await this.#execute(...this.store.state.lastArgs)\n            }\n            this.#resolvePreviousPromise = null\n            resolve(this.store.state.lastResult)\n          }, timeoutDuration)\n        }\n      })\n    }\n  }\n\n  #execute = async (\n    ...args: Parameters<TFn>\n  ): Promise<ReturnType<TFn> | undefined> => {\n    if (!this.#getEnabled() || this.store.state.isExecuting) return undefined\n    this.#abortController = new AbortController()\n    try {\n      this.#setState({ isExecuting: true })\n      const result = await this.fn(...args) // EXECUTE!\n      this.#setState({\n        lastResult: result,\n        successCount: this.store.state.successCount + 1,\n      })\n      this.options.onSuccess?.(result, this)\n    } catch (error) {\n      this.#setState({\n        errorCount: this.store.state.errorCount + 1,\n      })\n      this.options.onError?.(error, this)\n      if (this.options.throwOnError) {\n        this.#rejectPreviousPromiseInternal(error)\n      }\n    } finally {\n      const lastExecutionTime = Date.now()\n      const nextExecutionTime = lastExecutionTime + this.#getWait()\n      this.#setState({\n        isExecuting: false,\n        isPending: false,\n        settleCount: this.store.state.settleCount + 1,\n        lastExecutionTime,\n        nextExecutionTime,\n      })\n      this.#abortController = null\n      this.options.onSettled?.(this)\n      setTimeout(() => {\n        if (!this.store.state.isPending) {\n          this.#setState({ nextExecutionTime: undefined })\n        }\n      }, this.#getWait())\n    }\n    return this.store.state.lastResult\n  }\n\n  /**\n   * Processes the current pending execution immediately\n   */\n  flush = async (): Promise<ReturnType<TFn> | undefined> => {\n    if (this.store.state.isPending && this.store.state.lastArgs) {\n      this.#abortExecution() // abort any current execution\n      this.#clearTimeout() // clear any existing timeout\n      const result = await this.#execute(...this.store.state.lastArgs)\n\n      // Resolve any pending promise from maybeExecute\n      this.#resolvePreviousPromiseInternal()\n\n      return result\n    }\n    return undefined\n  }\n\n  #resolvePreviousPromiseInternal = (): void => {\n    if (this.#resolvePreviousPromise) {\n      this.#resolvePreviousPromise(this.store.state.lastResult)\n      this.#resolvePreviousPromise = null\n    }\n  }\n\n  #rejectPreviousPromiseInternal = (error: unknown): void => {\n    if (this.#rejectPreviousPromise) {\n      this.#rejectPreviousPromise(error)\n      this.#rejectPreviousPromise = null\n    }\n  }\n\n  #clearTimeout = (): void => {\n    if (this.#timeoutId) {\n      clearTimeout(this.#timeoutId)\n      this.#timeoutId = null\n    }\n  }\n\n  #cancelPendingExecution = (): void => {\n    this.#clearTimeout()\n    if (this.#resolvePreviousPromise) {\n      this.#resolvePreviousPromise(this.store.state.lastResult)\n      this.#resolvePreviousPromise = null\n    }\n    this.#setState({\n      isPending: false,\n      isExecuting: false,\n      lastArgs: undefined,\n    })\n  }\n\n  #abortExecution = (): void => {\n    if (this.#abortController) {\n      this.#abortController.abort()\n      this.#abortController = null\n    }\n  }\n\n  /**\n   * Cancels any pending execution or aborts any execution in progress\n   */\n  cancel = (): void => {\n    this.#cancelPendingExecution()\n    this.#abortExecution()\n  }\n\n  /**\n   * Resets the debouncer state to its default values\n   */\n  reset = (): void => {\n    this.#setState(getDefaultAsyncThrottlerState<TFn>())\n  }\n}\n\n/**\n * Creates an async throttled function that limits how often the function can execute.\n * The throttled function will execute at most once per wait period, even if called multiple times.\n * If called while executing, it will wait until execution completes before scheduling the next call.\n *\n * Unlike the non-async Throttler, this async version supports returning values from the throttled function,\n * making it ideal for API calls and other async operations where you want the result of the `maybeExecute` call\n * instead of setting the result on a state variable from within the throttled function.\n *\n * Error Handling:\n * - If an `onError` handler is provided, it will be called with the error and throttler instance\n * - If `throwOnError` is true (default when no onError handler is provided), the error will be thrown\n * - If `throwOnError` is false (default when onError handler is provided), the error will be swallowed\n * - Both onError and throwOnError can be used together - the handler will be called before any error is thrown\n * - The error state can be checked using the underlying AsyncThrottler instance\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the async throttler\n * - Use `onSuccess` callback to react to successful function execution and implement custom logic\n * - Use `onError` callback to react to function execution errors and implement custom error handling\n * - Use `onSettled` callback to react to function execution completion (success or error) and implement custom logic\n * - The state includes error count, execution status, last execution time, and success/settle counts\n * - State can be accessed via the underlying AsyncThrottler instance's `store.state` property\n * - When using framework adapters (React/Solid), state is accessed from the hook's state property\n *\n * @example\n * ```ts\n * const throttled = asyncThrottle(async (value: string) => {\n *   const result = await saveToAPI(value);\n *   return result; // Return value is preserved\n * }, {\n *   wait: 1000,\n *   onError: (error) => {\n *     console.error('API call failed:', error);\n *   }\n * });\n *\n * // This will execute at most once per second\n * // Returns the API response directly\n * const result = await throttled(inputElement.value);\n * ```\n */\nexport function asyncThrottle<TFn extends AnyAsyncFunction>(\n  fn: TFn,\n  initialOptions: AsyncThrottlerOptions<TFn>,\n) {\n  const asyncThrottler = new AsyncThrottler(fn, initialOptions)\n  return 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dist/esm/debouncer.js

@@ -72,4 +72,5 @@ import { Store } from "@tanstack/store";
       this.#setState({
+        executionCount: this.store.state.executionCount + 1,
         isPending: false,
-        executionCount: this.store.state.executionCount + 1
+        lastArgs: void 0
       });
@@ -76,0 +77,0 @@ this.options.onExecute?.(this);

dist/esm/debouncer.js.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"debouncer.js","sources":["../../src/debouncer.ts"],"sourcesContent":["import { Store } from '@tanstack/store'\nimport { parseFunctionOrValue } from './utils'\nimport type { AnyFunction } from './types'\n\nexport interface DebouncerState<TFn extends AnyFunction> {\n  /**\n   * Whether the debouncer can execute on the leading edge of the timeout\n   */\n  canLeadingExecute: boolean\n  /**\n   * Number of function executions that have been completed\n   */\n  executionCount: number\n  /**\n   * Whether the debouncer is waiting for the timeout to trigger execution\n   */\n  isPending: boolean\n  /**\n   * The arguments from the most recent call to maybeExecute\n   */\n  lastArgs: Parameters<TFn> | undefined\n  /**\n   * Current execution status - 'idle' when not active, 'pending' when waiting for timeout\n   */\n  status: 'disabled' | 'idle' | 'pending'\n}\n\nfunction getDefaultDebouncerState<\n  TFn extends AnyFunction,\n>(): DebouncerState<TFn> {\n  return structuredClone({\n    canLeadingExecute: true,\n    executionCount: 0,\n    isPending: false,\n    lastArgs: undefined,\n    status: 'idle',\n  })\n}\n\n/**\n * Options for configuring a debounced function\n */\nexport interface DebouncerOptions<TFn extends AnyFunction> {\n  /**\n   * Whether the debouncer is enabled. When disabled, maybeExecute will not trigger any executions.\n   * Can be a boolean or a function that returns a boolean.\n   * Defaults to true.\n   */\n  enabled?: boolean | ((debouncer: Debouncer<TFn>) => boolean)\n  /**\n   * Initial state for the debouncer\n   */\n  initialState?: Partial<DebouncerState<TFn>>\n  /**\n   * Whether to execute on the leading edge of the timeout.\n   * The first call will execute immediately and the rest will wait the delay.\n   * Defaults to false.\n   */\n  leading?: boolean\n  /**\n   * Callback function that is called after the function is executed\n   */\n  onExecute?: (debouncer: Debouncer<TFn>) => void\n  /**\n   * Whether to execute on the trailing edge of the timeout.\n   * Defaults to true.\n   */\n  trailing?: boolean\n  /**\n   * Delay in milliseconds before executing the function.\n   * Can be a number or a function that returns a number.\n   * Defaults to 0ms\n   */\n  wait: number | ((debouncer: Debouncer<TFn>) => number)\n}\n\nconst defaultOptions: Omit<\n  Required<DebouncerOptions<any>>,\n  'initialState' | 'onExecute'\n> = {\n  enabled: true,\n  leading: false,\n  trailing: true,\n  wait: 0,\n}\n\n/**\n * A class that creates a debounced function.\n *\n * Debouncing ensures that a function is only executed after a certain amount of time has passed\n * since its last invocation. This is useful for handling frequent events like window resizing,\n * scroll events, or input changes where you want to limit the rate of execution.\n *\n * The debounced function can be configured to execute either at the start of the delay period\n * (leading edge) or at the end (trailing edge, default). Each new call during the wait period\n * will reset the timer.\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the debouncer\n * - Use `onExecute` callback to react to function execution and implement custom logic\n * - The state includes canLeadingExecute, execution count, and isPending status\n * - State can be accessed via `debouncer.store.state` when using the class directly\n * - When using framework adapters (React/Solid), state is accessed from `debouncer.state`\n *\n * @example\n * ```ts\n * const debouncer = new Debouncer((value: string) => {\n *   saveToDatabase(value);\n * }, { wait: 500 });\n *\n * // Will only save after 500ms of no new input\n * inputElement.addEventListener('input', () => {\n *   debouncer.maybeExecute(inputElement.value);\n * });\n * ```\n */\nexport class Debouncer<TFn extends AnyFunction> {\n  readonly store: Store<Readonly<DebouncerState<TFn>>> = new Store(\n    getDefaultDebouncerState<TFn>(),\n  )\n  options: DebouncerOptions<TFn>\n  #timeoutId: NodeJS.Timeout | undefined\n\n  constructor(\n    private fn: TFn,\n    initialOptions: DebouncerOptions<TFn>,\n  ) {\n    this.options = {\n      ...defaultOptions,\n      ...initialOptions,\n    }\n    this.#setState(this.options.initialState ?? {})\n  }\n\n  /**\n   * Updates the debouncer options\n   */\n  setOptions = (newOptions: Partial<DebouncerOptions<TFn>>): void => {\n    this.options = { ...this.options, ...newOptions }\n\n    // Cancel pending execution if the debouncer is disabled\n    if (!this.#getEnabled()) {\n      this.cancel()\n    }\n  }\n\n  #setState = (newState: Partial<DebouncerState<TFn>>): void => {\n    this.store.setState((state) => {\n      const combinedState = {\n        ...state,\n        ...newState,\n      }\n      const { isPending } = combinedState\n      return {\n        ...combinedState,\n        status: !this.#getEnabled()\n          ? 'disabled'\n          : isPending\n            ? 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+{"version":3,"file":"debouncer.js","sources":["../../src/debouncer.ts"],"sourcesContent":["import { Store } from '@tanstack/store'\nimport { parseFunctionOrValue } from './utils'\nimport type { AnyFunction } from './types'\n\nexport interface DebouncerState<TFn extends AnyFunction> {\n  /**\n   * Whether the debouncer can execute on the leading edge of the timeout\n   */\n  canLeadingExecute: boolean\n  /**\n   * Number of function executions that have been completed\n   */\n  executionCount: number\n  /**\n   * Whether the debouncer is waiting for the timeout to trigger execution\n   */\n  isPending: boolean\n  /**\n   * The arguments from the most recent call to maybeExecute\n   */\n  lastArgs: Parameters<TFn> | undefined\n  /**\n   * Current execution status - 'idle' when not active, 'pending' when waiting for timeout\n   */\n  status: 'disabled' | 'idle' | 'pending'\n}\n\nfunction getDefaultDebouncerState<\n  TFn extends AnyFunction,\n>(): DebouncerState<TFn> {\n  return structuredClone({\n    canLeadingExecute: true,\n    executionCount: 0,\n    isPending: false,\n    lastArgs: undefined,\n    status: 'idle',\n  })\n}\n\n/**\n * Options for configuring a debounced function\n */\nexport interface DebouncerOptions<TFn extends AnyFunction> {\n  /**\n   * Whether the debouncer is enabled. When disabled, maybeExecute will not trigger any executions.\n   * Can be a boolean or a function that returns a boolean.\n   * Defaults to true.\n   */\n  enabled?: boolean | ((debouncer: Debouncer<TFn>) => boolean)\n  /**\n   * Initial state for the debouncer\n   */\n  initialState?: Partial<DebouncerState<TFn>>\n  /**\n   * Whether to execute on the leading edge of the timeout.\n   * The first call will execute immediately and the rest will wait the delay.\n   * Defaults to false.\n   */\n  leading?: boolean\n  /**\n   * Callback function that is called after the function is executed\n   */\n  onExecute?: (debouncer: Debouncer<TFn>) => void\n  /**\n   * Whether to execute on the trailing edge of the timeout.\n   * Defaults to true.\n   */\n  trailing?: boolean\n  /**\n   * Delay in milliseconds before executing the function.\n   * Can be a number or a function that returns a number.\n   * Defaults to 0ms\n   */\n  wait: number | ((debouncer: Debouncer<TFn>) => number)\n}\n\nconst defaultOptions: Omit<\n  Required<DebouncerOptions<any>>,\n  'initialState' | 'onExecute'\n> = {\n  enabled: true,\n  leading: false,\n  trailing: true,\n  wait: 0,\n}\n\n/**\n * A class that creates a debounced function.\n *\n * Debouncing ensures that a function is only executed after a certain amount of time has passed\n * since its last invocation. This is useful for handling frequent events like window resizing,\n * scroll events, or input changes where you want to limit the rate of execution.\n *\n * The debounced function can be configured to execute either at the start of the delay period\n * (leading edge) or at the end (trailing edge, default). Each new call during the wait period\n * will reset the timer.\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the debouncer\n * - Use `onExecute` callback to react to function execution and implement custom logic\n * - The state includes canLeadingExecute, execution count, and isPending status\n * - State can be accessed via `debouncer.store.state` when using the class directly\n * - When using framework adapters (React/Solid), state is accessed from `debouncer.state`\n *\n * @example\n * ```ts\n * const debouncer = new Debouncer((value: string) => {\n *   saveToDatabase(value);\n * }, { wait: 500 });\n *\n * // Will only save after 500ms of no new input\n * inputElement.addEventListener('input', () => {\n *   debouncer.maybeExecute(inputElement.value);\n * });\n * ```\n */\nexport class Debouncer<TFn extends AnyFunction> {\n  readonly store: Store<Readonly<DebouncerState<TFn>>> = new Store(\n    getDefaultDebouncerState<TFn>(),\n  )\n  options: DebouncerOptions<TFn>\n  #timeoutId: NodeJS.Timeout | undefined\n\n  constructor(\n    private fn: TFn,\n    initialOptions: DebouncerOptions<TFn>,\n  ) {\n    this.options = {\n      ...defaultOptions,\n      ...initialOptions,\n    }\n    this.#setState(this.options.initialState ?? {})\n  }\n\n  /**\n   * Updates the debouncer options\n   */\n  setOptions = (newOptions: Partial<DebouncerOptions<TFn>>): void => {\n    this.options = { ...this.options, ...newOptions }\n\n    // Cancel pending execution if the debouncer is disabled\n    if (!this.#getEnabled()) {\n      this.cancel()\n    }\n  }\n\n  #setState = (newState: Partial<DebouncerState<TFn>>): void => {\n    this.store.setState((state) => {\n      const combinedState = {\n        ...state,\n        ...newState,\n      }\n      const { isPending } = combinedState\n      return {\n        ...combinedState,\n        status: !this.#getEnabled()\n          ? 'disabled'\n          : isPending\n            ? 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If you need\n * more control over the debouncing behavior, use the Debouncer class directly.\n *\n * If leading option is true, the function will execute immediately on the first call, then wait the delay\n * before allowing another execution.\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the debouncer\n * - Use `onExecute` callback to react to function execution and implement custom logic\n * - The state includes canLeadingExecute, execution count, and isPending status\n * - State can be accessed via the underlying Debouncer instance's `store.state` property\n * - When using framework adapters (React/Solid), state is accessed from the hook's state property\n *\n * @example\n * ```ts\n * const debounced = debounce(() => {\n *   saveChanges();\n * }, { wait: 1000 });\n *\n * // Called repeatedly but executes at most once per second\n * inputElement.addEventListener('input', debounced);\n * ```\n */\nexport function debounce<TFn extends AnyFunction>(\n  fn: TFn,\n  initialOptions: DebouncerOptions<TFn>,\n): (...args: Parameters<TFn>) => void {\n  const debouncer = new Debouncer(fn, initialOptions)\n  return debouncer.maybeExecute\n}\n"],"names":[],"mappings":";;AA2BA,SAAS,2BAEgB;AACvB,SAAO,gBAAgB;AAAA,IACrB,mBAAmB;AAAA,IACnB,gBAAgB;AAAA,IAChB,WAAW;AAAA,IACX,UAAU;AAAA,IACV,QAAQ;AAAA,EAAA,CACT;AACH;AAuCA,MAAM,iBAGF;AAAA,EACF,SAAS;AAAA,EACT,SAAS;AAAA,EACT,UAAU;AAAA,EACV,MAAM;AACR;AAiCO,MAAM,UAAmC;AAAA,EAO9C,YACU,IACR,gBACA;AAFQ,SAAA,KAAA;AAPV,SAAS,QAA8C,IAAI;AAAA,MACzD,yBAAA;AAAA,IAA8B;AAmBhC,SAAA,aAAa,CAAC,eAAqD;AACjE,WAAK,UAAU,EAAE,GAAG,KAAK,SAAS,GAAG,WAAA;AAGrC,UAAI,CAAC,KAAK,eAAe;AACvB,aAAK,OAAA;AAAA,MAAO;AAAA,IACd;AAGF,SAAA,YAAY,CAAC,aAAiD;AAC5D,WAAK,MAAM,SAAS,CAAC,UAAU;AAC7B,cAAM,gBAAgB;AAAA,UACpB,GAAG;AAAA,UACH,GAAG;AAAA,QAAA;AAEL,cAAM,EAAE,cAAc;AACtB,eAAO;AAAA,UACL,GAAG;AAAA,UACH,QAAQ,CAAC,KAAK,gBACV,aACA,YACE,YACA;AAAA,QAAA;AAAA,MACR,CACD;AAAA,IAAA;AAMH,SAAA,cAAc,MAAe;AAC3B,aAAO,CAAC,CAAC,qBAAqB,KAAK,QAAQ,SAAS,IAAI;AAAA,IAAA;AAM1D,SAAA,WAAW,MAAc;AACvB,aAAO,qBAAqB,KAAK,QAAQ,MAAM,IAAI;AAAA,IAAA;AAOrD,SAAA,eAAe,IAAI,SAAgC;AACjD,UAAI,CAAC,KAAK,YAAA,EAAe,QAAO;AAChC,UAAI,qBAAqB;AAGzB,UAAI,KAAK,QAAQ,WAAW,KAAK,MAAM,MAAM,mBAAmB;AAC9D,aAAK,UAAU,EAAE,mBAAmB,MAAA,CAAO;AAC3C,6BAAqB;AACrB,aAAK,SAAS,GAAG,IAAI;AAAA,MAAA;AAIvB,UAAI,KAAK,QAAQ,UAAU;AACzB,aAAK,UAAU,EAAE,WAAW,MAAM,UAAU,MAAM;AAAA,MAAA;AAIpD,UAAI,KAAK,WAAY,cAAa,KAAK,UAAU;AAGjD,WAAK,aAAa,WAAW,MAAM;AACjC,aAAK,UAAU,EAAE,mBAAmB,KAAA,CAAM;AAC1C,YAAI,KAAK,QAAQ,YAAY,CAAC,oBAAoB;AAChD,eAAK,SAAS,GAAG,IAAI;AAAA,QAAA;AAAA,MACvB,GACC,KAAK,UAAU;AAAA,IAAA;AAGpB,SAAA,WAAW,IAAI,SAAgC;AAC7C,UAAI,CAAC,KAAK,YAAA,EAAe,QAAO;AAChC,WAAK,GAAG,GAAG,IAAI;AACf,WAAK,UAAU;AAAA,QACb,gBAAgB,KAAK,MAAM,MAAM,iBAAiB;AAAA,QAClD,WAAW;AAAA,QACX,UAAU;AAAA,MAAA,CACX;AACD,WAAK,QAAQ,YAAY,IAAI;AAAA,IAAA;AAM/B,SAAA,QAAQ,MAAY;AAClB,UAAI,KAAK,MAAM,MAAM,aAAa,KAAK,MAAM,MAAM,UAAU;AAC3D,aAAK,cAAA;AACL,aAAK,SAAS,GAAG,KAAK,MAAM,MAAM,QAAQ;AAAA,MAAA;AAAA,IAC5C;AAGF,SAAA,gBAAgB,MAAY;AAC1B,UAAI,KAAK,YAAY;AACnB,qBAAa,KAAK,UAAU;AAC5B,aAAK,aAAa;AAAA,MAAA;AAAA,IACpB;AAMF,SAAA,SAAS,MAAY;AACnB,WAAK,cAAA;AACL,WAAK,UAAU;AAAA,QACb,mBAAmB;AAAA,QACnB,WAAW;AAAA,MAAA,CACZ;AAAA,IAAA;AAMH,SAAA,QAAQ,MAAY;AAClB,WAAK,UAAU,0BAA+B;AAAA,IAAA;AA9H9C,SAAK,UAAU;AAAA,MACb,GAAG;AAAA,MACH,GAAG;AAAA,IAAA;AAEL,SAAK,UAAU,KAAK,QAAQ,gBAAgB,CAAA,CAAE;AAAA,EAAA;AAAA,EAVhD;AAAA,EAyBA;AAAA,EAqBA;AAAA,EAOA;AAAA,EAoCA;AAAA,EAqBA;AAwBF;AA8BO,SAAS,SACd,IACA,gBACoC;AACpC,QAAM,YAAY,IAAI,UAAU,IAAI,cAAc;AAClD,SAAO,UAAU;AACnB;"}

dist/esm/throttler.d.ts

@@ -23,3 +23,3 @@ import { Store } from '@tanstack/store';
      */
-    nextExecutionTime: number;
+    nextExecutionTime: number | undefined;
     /**
@@ -26,0 +26,0 @@ * Current execution status - 'idle' when not active, 'pending' when waiting for timeout

dist/esm/throttler.js

@@ -87,2 +87,7 @@ import { Store } from "@tanstack/store";
       this.options.onExecute?.(this);
+      setTimeout(() => {
+        if (!this.store.state.isPending) {
+          this.#setState({ nextExecutionTime: void 0 });
+        }
+      }, this.#getWait());
     };
@@ -89,0 +94,0 @@ this.flush = () => {

dist/esm/throttler.js.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"throttler.js","sources":["../../src/throttler.ts"],"sourcesContent":["import { Store } from '@tanstack/store'\nimport { parseFunctionOrValue } from './utils'\nimport type { AnyFunction } from './types'\n\nexport interface ThrottlerState<TFn extends AnyFunction> {\n  /**\n   * Number of function executions that have been completed\n   */\n  executionCount: number\n  /**\n   * Whether the throttler is waiting for the timeout to trigger execution\n   */\n  isPending: boolean\n  /**\n   * The arguments from the most recent call to maybeExecute\n   */\n  lastArgs: Parameters<TFn> | undefined\n  /**\n   * Timestamp of the last function execution in milliseconds\n   */\n  lastExecutionTime: number\n  /**\n   * Timestamp when the next execution can occur in milliseconds\n   */\n  nextExecutionTime: number\n  /**\n   * Current execution status - 'idle' when not active, 'pending' when waiting for timeout\n   */\n  status: 'disabled' | 'idle' | 'pending'\n}\n\nfunction getDefaultThrottlerState<\n  TFn extends AnyFunction,\n>(): ThrottlerState<TFn> {\n  return structuredClone({\n    executionCount: 0,\n    isPending: false,\n    lastArgs: undefined,\n    lastExecutionTime: 0,\n    nextExecutionTime: 0,\n    status: 'idle',\n  })\n}\n\n/**\n * Options for configuring a throttled function\n */\nexport interface ThrottlerOptions<TFn extends AnyFunction> {\n  /**\n   * Whether the throttler is enabled. When disabled, maybeExecute will not trigger any executions.\n   * Can be a boolean or a function that returns a boolean.\n   * Defaults to true.\n   */\n  enabled?: boolean | ((throttler: Throttler<TFn>) => boolean)\n  /**\n   * Initial state for the throttler\n   */\n  initialState?: Partial<ThrottlerState<TFn>>\n  /**\n   * Whether to execute on the leading edge of the timeout.\n   * Defaults to true.\n   */\n  leading?: boolean\n  /**\n   * Callback function that is called after the function is executed\n   */\n  onExecute?: (throttler: Throttler<TFn>) => void\n  /**\n   * Whether to execute on the trailing edge of the timeout.\n   * Defaults to true.\n   */\n  trailing?: boolean\n  /**\n   * Time window in milliseconds during which the function can only be executed once.\n   * Can be a number or a function that returns a number.\n   * Defaults to 0ms\n   */\n  wait: number | ((throttler: Throttler<TFn>) => number)\n}\n\nconst defaultOptions: Omit<\n  Required<ThrottlerOptions<any>>,\n  'initialState' | 'onExecute'\n> = {\n  enabled: true,\n  leading: true,\n  trailing: true,\n  wait: 0,\n}\n\n/**\n * A class that creates a throttled function.\n *\n * Throttling ensures a function is called at most once within a specified time window.\n * Unlike debouncing which waits for a pause in calls, throttling guarantees consistent\n * execution timing regardless of call frequency.\n *\n * Supports both leading and trailing edge execution:\n * - Leading: Execute immediately on first call (default: true)\n * - Trailing: Execute after wait period if called during throttle (default: true)\n *\n * For collapsing rapid-fire events where you only care about the last call, consider using Debouncer.\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the throttler\n * - Use `onExecute` callback to react to function execution and implement custom logic\n * - The state includes execution count, last execution time, pending status, and more\n * - State can be accessed via `throttler.store.state` when using the class directly\n * - When using framework adapters (React/Solid), state is accessed from `throttler.state`\n *\n * @example\n * ```ts\n * const throttler = new Throttler(\n *   (id: string) => api.getData(id),\n *   { wait: 1000 } // Execute at most once per second\n * );\n *\n * // First call executes immediately\n * throttler.maybeExecute('123');\n *\n * // Subsequent calls within 1000ms are throttled\n * throttler.maybeExecute('123'); // Throttled\n * ```\n */\nexport class Throttler<TFn extends AnyFunction> {\n  readonly store: Store<Readonly<ThrottlerState<TFn>>> = new Store(\n    getDefaultThrottlerState(),\n  )\n  options: ThrottlerOptions<TFn>\n  #timeoutId: NodeJS.Timeout | undefined\n\n  constructor(\n    private fn: TFn,\n    initialOptions: ThrottlerOptions<TFn>,\n  ) {\n    this.options = {\n      ...defaultOptions,\n      ...initialOptions,\n    }\n    this.#setState(this.options.initialState ?? {})\n  }\n\n  /**\n   * Updates the throttler options\n   */\n  setOptions = (newOptions: Partial<ThrottlerOptions<TFn>>): void => {\n    this.options = { ...this.options, ...newOptions }\n\n    // Cancel pending execution if the throttler is disabled\n    if (!this.#getEnabled()) {\n      this.cancel()\n    }\n  }\n\n  #setState = (newState: Partial<ThrottlerState<TFn>>): void => {\n    this.store.setState((state) => {\n      const combinedState = {\n        ...state,\n        ...newState,\n      }\n      const { isPending } = combinedState\n      return {\n        ...combinedState,\n        status: !this.#getEnabled()\n          ? 'disabled'\n          : isPending\n            ? 'pending'\n            : 'idle',\n      }\n    })\n  }\n\n  #getEnabled = (): boolean => {\n    return !!parseFunctionOrValue(this.options.enabled, this)\n  }\n\n  #getWait = (): number => {\n    return parseFunctionOrValue(this.options.wait, this)\n  }\n\n  /**\n   * Attempts to execute the throttled function. The execution behavior depends on the throttler options:\n   *\n   * - If enough time has passed since the last execution (>= wait period):\n   *   - With leading=true: Executes immediately\n   *   - With leading=false: Waits for the next trailing execution\n   *\n   * - If within the wait period:\n   *   - With trailing=true: Schedules execution for end of wait period\n   *   - With trailing=false: Drops the execution\n   *\n   * @example\n   * ```ts\n   * const throttled = new Throttler(fn, { wait: 1000 });\n   *\n   * // First call executes immediately\n   * throttled.maybeExecute('a', 'b');\n   *\n   * // Call during wait period - gets throttled\n   * throttled.maybeExecute('c', 'd');\n   * ```\n   */\n  maybeExecute = (...args: Parameters<TFn>): void => {\n    const now = Date.now()\n    const timeSinceLastExecution = now - this.store.state.lastExecutionTime\n    const wait = this.#getWait()\n\n    // Handle leading execution\n    if (this.options.leading && timeSinceLastExecution >= wait) {\n      this.#execute(...args)\n    } else {\n      // Store the most recent arguments for potential trailing execution\n      this.#setState({\n        lastArgs: args,\n      })\n      // Set up trailing execution if not already scheduled\n      if (!this.#timeoutId && this.options.trailing) {\n        // prevent large number if lastExecutionTime is undefined\n        const _timeSinceLastExecution = this.store.state.lastExecutionTime\n          ? now - this.store.state.lastExecutionTime\n          : 0\n        const timeoutDuration = wait - _timeSinceLastExecution\n        this.#setState({ isPending: true })\n        this.#timeoutId = setTimeout(() => {\n          const { lastArgs } = this.store.state\n          if (lastArgs !== undefined) {\n            this.#execute(...lastArgs)\n          }\n        }, timeoutDuration)\n      }\n    }\n  }\n\n  #execute = (...args: Parameters<TFn>): void => {\n    if (!this.#getEnabled()) return\n    this.fn(...args) // EXECUTE!\n    const lastExecutionTime = Date.now()\n    const nextExecutionTime = lastExecutionTime + this.#getWait()\n    this.#clearTimeout()\n    this.#setState({\n      executionCount: this.store.state.executionCount + 1,\n      lastExecutionTime,\n      nextExecutionTime,\n      isPending: false,\n      lastArgs: undefined,\n    })\n    this.options.onExecute?.(this)\n  }\n\n  /**\n   * Processes the current pending execution immediately\n   */\n  flush = (): void => {\n    if (this.store.state.isPending && this.store.state.lastArgs) {\n      this.#execute(...this.store.state.lastArgs)\n    }\n  }\n\n  #clearTimeout = (): void => {\n    if (this.#timeoutId) {\n      clearTimeout(this.#timeoutId)\n      this.#timeoutId = undefined\n    }\n  }\n\n  /**\n   * Cancels any pending trailing execution and clears internal state.\n   *\n   * If a trailing execution is scheduled (due to throttling with trailing=true),\n   * this will prevent that execution from occurring. The internal timeout and\n   * stored arguments will be cleared.\n   *\n   * Has no effect if there is no pending execution.\n   */\n  cancel = (): void => {\n    this.#clearTimeout()\n    this.#setState({\n      lastArgs: undefined,\n      isPending: false,\n    })\n  }\n\n  /**\n   * Resets the throttler state to its default values\n   */\n  reset = (): void => {\n    this.#setState(getDefaultThrottlerState<TFn>())\n  }\n}\n\n/**\n * Creates a throttled function that limits how often the provided function can execute.\n *\n * Throttling ensures a function executes at most once within a specified time window,\n * regardless of how many times it is called. This is useful for rate-limiting\n * expensive operations or UI updates.\n *\n * The throttled function can be configured to execute on the leading and/or trailing\n * edge of the throttle window via options.\n *\n * For handling bursts of events, consider using debounce() instead. For hard execution\n * limits, consider using rateLimit().\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the throttler\n * - Use `onExecute` callback to react to function execution and implement custom logic\n * - The state includes execution count, last execution time, pending status, and more\n * - State can be accessed via the underlying Throttler instance's `store.state` property\n * - When using framework adapters (React/Solid), state is accessed from the hook's state property\n *\n * @example\n * ```ts\n * // Basic throttling - max once per second\n * const throttled = throttle(updateUI, { wait: 1000 });\n *\n * // Configure leading/trailing execution\n * const throttled = throttle(saveData, {\n *   wait: 2000,\n *   leading: true,  // Execute immediately on first call\n *   trailing: true  // Execute again after delay if called during wait\n * });\n * ```\n */\nexport function throttle<TFn extends AnyFunction>(\n  fn: TFn,\n  initialOptions: ThrottlerOptions<TFn>,\n) {\n  const throttler = new Throttler(fn, initialOptions)\n  return throttler.maybeExecute\n}\n"],"names":[],"mappings":";;AA+BA,SAAS,2BAEgB;AACvB,SAAO,gBAAgB;AAAA,IACrB,gBAAgB;AAAA,IAChB,WAAW;AAAA,IACX,UAAU;AAAA,IACV,mBAAmB;AAAA,IACnB,mBAAmB;AAAA,IACnB,QAAQ;AAAA,EAAA,CACT;AACH;AAsCA,MAAM,iBAGF;AAAA,EACF,SAAS;AAAA,EACT,SAAS;AAAA,EACT,UAAU;AAAA,EACV,MAAM;AACR;AAqCO,MAAM,UAAmC;AAAA,EAO9C,YACU,IACR,gBACA;AAFQ,SAAA,KAAA;AAPV,SAAS,QAA8C,IAAI;AAAA,MACzD,yBAAA;AAAA,IAAyB;AAmB3B,SAAA,aAAa,CAAC,eAAqD;AACjE,WAAK,UAAU,EAAE,GAAG,KAAK,SAAS,GAAG,WAAA;AAGrC,UAAI,CAAC,KAAK,eAAe;AACvB,aAAK,OAAA;AAAA,MAAO;AAAA,IACd;AAGF,SAAA,YAAY,CAAC,aAAiD;AAC5D,WAAK,MAAM,SAAS,CAAC,UAAU;AAC7B,cAAM,gBAAgB;AAAA,UACpB,GAAG;AAAA,UACH,GAAG;AAAA,QAAA;AAEL,cAAM,EAAE,cAAc;AACtB,eAAO;AAAA,UACL,GAAG;AAAA,UACH,QAAQ,CAAC,KAAK,gBACV,aACA,YACE,YACA;AAAA,QAAA;AAAA,MACR,CACD;AAAA,IAAA;AAGH,SAAA,cAAc,MAAe;AAC3B,aAAO,CAAC,CAAC,qBAAqB,KAAK,QAAQ,SAAS,IAAI;AAAA,IAAA;AAG1D,SAAA,WAAW,MAAc;AACvB,aAAO,qBAAqB,KAAK,QAAQ,MAAM,IAAI;AAAA,IAAA;AAyBrD,SAAA,eAAe,IAAI,SAAgC;AACjD,YAAM,MAAM,KAAK,IAAA;AACjB,YAAM,yBAAyB,MAAM,KAAK,MAAM,MAAM;AACtD,YAAM,OAAO,KAAK,SAAA;AAGlB,UAAI,KAAK,QAAQ,WAAW,0BAA0B,MAAM;AAC1D,aAAK,SAAS,GAAG,IAAI;AAAA,MAAA,OAChB;AAEL,aAAK,UAAU;AAAA,UACb,UAAU;AAAA,QAAA,CACX;AAED,YAAI,CAAC,KAAK,cAAc,KAAK,QAAQ,UAAU;AAE7C,gBAAM,0BAA0B,KAAK,MAAM,MAAM,oBAC7C,MAAM,KAAK,MAAM,MAAM,oBACvB;AACJ,gBAAM,kBAAkB,OAAO;AAC/B,eAAK,UAAU,EAAE,WAAW,KAAA,CAAM;AAClC,eAAK,aAAa,WAAW,MAAM;AACjC,kBAAM,EAAE,SAAA,IAAa,KAAK,MAAM;AAChC,gBAAI,aAAa,QAAW;AAC1B,mBAAK,SAAS,GAAG,QAAQ;AAAA,YAAA;AAAA,UAC3B,GACC,eAAe;AAAA,QAAA;AAAA,MACpB;AAAA,IACF;AAGF,SAAA,WAAW,IAAI,SAAgC;AAC7C,UAAI,CAAC,KAAK,cAAe;AACzB,WAAK,GAAG,GAAG,IAAI;AACf,YAAM,oBAAoB,KAAK,IAAA;AAC/B,YAAM,oBAAoB,oBAAoB,KAAK,SAAA;AACnD,WAAK,cAAA;AACL,WAAK,UAAU;AAAA,QACb,gBAAgB,KAAK,MAAM,MAAM,iBAAiB;AAAA,QAClD;AAAA,QACA;AAAA,QACA,WAAW;AAAA,QACX,UAAU;AAAA,MAAA,CACX;AACD,WAAK,QAAQ,YAAY,IAAI;AAAA,IAAA;AAM/B,SAAA,QAAQ,MAAY;AAClB,UAAI,KAAK,MAAM,MAAM,aAAa,KAAK,MAAM,MAAM,UAAU;AAC3D,aAAK,SAAS,GAAG,KAAK,MAAM,MAAM,QAAQ;AAAA,MAAA;AAAA,IAC5C;AAGF,SAAA,gBAAgB,MAAY;AAC1B,UAAI,KAAK,YAAY;AACnB,qBAAa,KAAK,UAAU;AAC5B,aAAK,aAAa;AAAA,MAAA;AAAA,IACpB;AAYF,SAAA,SAAS,MAAY;AACnB,WAAK,cAAA;AACL,WAAK,UAAU;AAAA,QACb,UAAU;AAAA,QACV,WAAW;AAAA,MAAA,CACZ;AAAA,IAAA;AAMH,SAAA,QAAQ,MAAY;AAClB,WAAK,UAAU,0BAA+B;AAAA,IAAA;AAvJ9C,SAAK,UAAU;AAAA,MACb,GAAG;AAAA,MACH,GAAG;AAAA,IAAA;AAEL,SAAK,UAAU,KAAK,QAAQ,gBAAgB,CAAA,CAAE;AAAA,EAAA;AAAA,EAVhD;AAAA,EAyBA;AAAA,EAkBA;AAAA,EAIA;AAAA,EAyDA;AAAA,EAyBA;AA8BF;AAoCO,SAAS,SACd,IACA,gBACA;AACA,QAAM,YAAY,IAAI,UAAU,IAAI,cAAc;AAClD,SAAO,UAAU;AACnB;"}
+{"version":3,"file":"throttler.js","sources":["../../src/throttler.ts"],"sourcesContent":["import { Store } from '@tanstack/store'\nimport { parseFunctionOrValue } from './utils'\nimport type { AnyFunction } from './types'\n\nexport interface ThrottlerState<TFn extends AnyFunction> {\n  /**\n   * Number of function executions that have been completed\n   */\n  executionCount: number\n  /**\n   * Whether the throttler is waiting for the timeout to trigger execution\n   */\n  isPending: boolean\n  /**\n   * The arguments from the most recent call to maybeExecute\n   */\n  lastArgs: Parameters<TFn> | undefined\n  /**\n   * Timestamp of the last function execution in milliseconds\n   */\n  lastExecutionTime: number\n  /**\n   * Timestamp when the next execution can occur in milliseconds\n   */\n  nextExecutionTime: number | undefined\n  /**\n   * Current execution status - 'idle' when not active, 'pending' when waiting for timeout\n   */\n  status: 'disabled' | 'idle' | 'pending'\n}\n\nfunction getDefaultThrottlerState<\n  TFn extends AnyFunction,\n>(): ThrottlerState<TFn> {\n  return structuredClone({\n    executionCount: 0,\n    isPending: false,\n    lastArgs: undefined,\n    lastExecutionTime: 0,\n    nextExecutionTime: 0,\n    status: 'idle',\n  })\n}\n\n/**\n * Options for configuring a throttled function\n */\nexport interface ThrottlerOptions<TFn extends AnyFunction> {\n  /**\n   * Whether the throttler is enabled. When disabled, maybeExecute will not trigger any executions.\n   * Can be a boolean or a function that returns a boolean.\n   * Defaults to true.\n   */\n  enabled?: boolean | ((throttler: Throttler<TFn>) => boolean)\n  /**\n   * Initial state for the throttler\n   */\n  initialState?: Partial<ThrottlerState<TFn>>\n  /**\n   * Whether to execute on the leading edge of the timeout.\n   * Defaults to true.\n   */\n  leading?: boolean\n  /**\n   * Callback function that is called after the function is executed\n   */\n  onExecute?: (throttler: Throttler<TFn>) => void\n  /**\n   * Whether to execute on the trailing edge of the timeout.\n   * Defaults to true.\n   */\n  trailing?: boolean\n  /**\n   * Time window in milliseconds during which the function can only be executed once.\n   * Can be a number or a function that returns a number.\n   * Defaults to 0ms\n   */\n  wait: number | ((throttler: Throttler<TFn>) => number)\n}\n\nconst defaultOptions: Omit<\n  Required<ThrottlerOptions<any>>,\n  'initialState' | 'onExecute'\n> = {\n  enabled: true,\n  leading: true,\n  trailing: true,\n  wait: 0,\n}\n\n/**\n * A class that creates a throttled function.\n *\n * Throttling ensures a function is called at most once within a specified time window.\n * Unlike debouncing which waits for a pause in calls, throttling guarantees consistent\n * execution timing regardless of call frequency.\n *\n * Supports both leading and trailing edge execution:\n * - Leading: Execute immediately on first call (default: true)\n * - Trailing: Execute after wait period if called during throttle (default: true)\n *\n * For collapsing rapid-fire events where you only care about the last call, consider using Debouncer.\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the throttler\n * - Use `onExecute` callback to react to function execution and implement custom logic\n * - The state includes execution count, last execution time, pending status, and more\n * - State can be accessed via `throttler.store.state` when using the class directly\n * - When using framework adapters (React/Solid), state is accessed from `throttler.state`\n *\n * @example\n * ```ts\n * const throttler = new Throttler(\n *   (id: string) => api.getData(id),\n *   { wait: 1000 } // Execute at most once per second\n * );\n *\n * // First call executes immediately\n * throttler.maybeExecute('123');\n *\n * // Subsequent calls within 1000ms are throttled\n * throttler.maybeExecute('123'); // Throttled\n * ```\n */\nexport class Throttler<TFn extends AnyFunction> {\n  readonly store: Store<Readonly<ThrottlerState<TFn>>> = new Store(\n    getDefaultThrottlerState(),\n  )\n  options: ThrottlerOptions<TFn>\n  #timeoutId: NodeJS.Timeout | undefined\n\n  constructor(\n    private fn: TFn,\n    initialOptions: ThrottlerOptions<TFn>,\n  ) {\n    this.options = {\n      ...defaultOptions,\n      ...initialOptions,\n    }\n    this.#setState(this.options.initialState ?? {})\n  }\n\n  /**\n   * Updates the throttler options\n   */\n  setOptions = (newOptions: Partial<ThrottlerOptions<TFn>>): void => {\n    this.options = { ...this.options, ...newOptions }\n\n    // Cancel pending execution if the throttler is disabled\n    if (!this.#getEnabled()) {\n      this.cancel()\n    }\n  }\n\n  #setState = (newState: Partial<ThrottlerState<TFn>>): void => {\n    this.store.setState((state) => {\n      const combinedState = {\n        ...state,\n        ...newState,\n      }\n      const { isPending } = combinedState\n      return {\n        ...combinedState,\n        status: !this.#getEnabled()\n          ? 'disabled'\n          : isPending\n            ? 'pending'\n            : 'idle',\n      }\n    })\n  }\n\n  #getEnabled = (): boolean => {\n    return !!parseFunctionOrValue(this.options.enabled, this)\n  }\n\n  #getWait = (): number => {\n    return parseFunctionOrValue(this.options.wait, this)\n  }\n\n  /**\n   * Attempts to execute the throttled function. The execution behavior depends on the throttler options:\n   *\n   * - If enough time has passed since the last execution (>= wait period):\n   *   - With leading=true: Executes immediately\n   *   - With leading=false: Waits for the next trailing execution\n   *\n   * - If within the wait period:\n   *   - With trailing=true: Schedules execution for end of wait period\n   *   - With trailing=false: Drops the execution\n   *\n   * @example\n   * ```ts\n   * const throttled = new Throttler(fn, { wait: 1000 });\n   *\n   * // First call executes immediately\n   * throttled.maybeExecute('a', 'b');\n   *\n   * // Call during wait period - gets throttled\n   * throttled.maybeExecute('c', 'd');\n   * ```\n   */\n  maybeExecute = (...args: Parameters<TFn>): void => {\n    const now = Date.now()\n    const timeSinceLastExecution = now - this.store.state.lastExecutionTime\n    const wait = this.#getWait()\n\n    // Handle leading execution\n    if (this.options.leading && timeSinceLastExecution >= wait) {\n      this.#execute(...args)\n    } else {\n      // Store the most recent arguments for potential trailing execution\n      this.#setState({\n        lastArgs: args,\n      })\n      // Set up trailing execution if not already scheduled\n      if (!this.#timeoutId && this.options.trailing) {\n        // prevent large number if lastExecutionTime is undefined\n        const _timeSinceLastExecution = this.store.state.lastExecutionTime\n          ? now - this.store.state.lastExecutionTime\n          : 0\n        const timeoutDuration = wait - _timeSinceLastExecution\n        this.#setState({ isPending: true })\n        this.#timeoutId = setTimeout(() => {\n          const { lastArgs } = this.store.state\n          if (lastArgs !== undefined) {\n            this.#execute(...lastArgs)\n          }\n        }, timeoutDuration)\n      }\n    }\n  }\n\n  #execute = (...args: Parameters<TFn>): void => {\n    if (!this.#getEnabled()) return\n    this.fn(...args) // EXECUTE!\n    const lastExecutionTime = Date.now()\n    const nextExecutionTime = lastExecutionTime + this.#getWait()\n    this.#clearTimeout()\n    this.#setState({\n      executionCount: this.store.state.executionCount + 1,\n      lastExecutionTime,\n      nextExecutionTime,\n      isPending: false,\n      lastArgs: undefined,\n    })\n    this.options.onExecute?.(this)\n    setTimeout(() => {\n      if (!this.store.state.isPending) {\n        this.#setState({ nextExecutionTime: undefined })\n      }\n    }, this.#getWait())\n  }\n\n  /**\n   * Processes the current pending execution immediately\n   */\n  flush = (): void => {\n    if (this.store.state.isPending && this.store.state.lastArgs) {\n      this.#execute(...this.store.state.lastArgs)\n    }\n  }\n\n  #clearTimeout = (): void => {\n    if (this.#timeoutId) {\n      clearTimeout(this.#timeoutId)\n      this.#timeoutId = undefined\n    }\n  }\n\n  /**\n   * Cancels any pending trailing execution and clears internal state.\n   *\n   * If a trailing execution is scheduled (due to throttling with trailing=true),\n   * this will prevent that execution from occurring. The internal timeout and\n   * stored arguments will be cleared.\n   *\n   * Has no effect if there is no pending execution.\n   */\n  cancel = (): void => {\n    this.#clearTimeout()\n    this.#setState({\n      lastArgs: undefined,\n      isPending: false,\n    })\n  }\n\n  /**\n   * Resets the throttler state to its default values\n   */\n  reset = (): void => {\n    this.#setState(getDefaultThrottlerState<TFn>())\n  }\n}\n\n/**\n * Creates a throttled function that limits how often the provided function can execute.\n *\n * Throttling ensures a function executes at most once within a specified time window,\n * regardless of how many times it is called. This is useful for rate-limiting\n * expensive operations or UI updates.\n *\n * The throttled function can be configured to execute on the leading and/or trailing\n * edge of the throttle window via options.\n *\n * For handling bursts of events, consider using debounce() instead. For hard execution\n * limits, consider using rateLimit().\n *\n * State Management:\n * - Uses TanStack Store for reactive state management\n * - Use `initialState` to provide initial state values when creating the throttler\n * - Use `onExecute` callback to react to function execution and implement custom logic\n * - The state includes execution count, last execution time, pending status, and more\n * - State can be accessed via the underlying Throttler instance's `store.state` property\n * - When using framework adapters (React/Solid), state is accessed from the hook's state property\n *\n * @example\n * ```ts\n * // Basic throttling - max once per second\n * const throttled = throttle(updateUI, { wait: 1000 });\n *\n * // Configure leading/trailing execution\n * const throttled = throttle(saveData, {\n *   wait: 2000,\n *   leading: true,  // Execute immediately on first call\n *   trailing: true  // Execute again after delay if called during wait\n * });\n * ```\n */\nexport function throttle<TFn extends AnyFunction>(\n  fn: TFn,\n  initialOptions: ThrottlerOptions<TFn>,\n) {\n  const throttler = new Throttler(fn, initialOptions)\n  return throttler.maybeExecute\n}\n"],"names":[],"mappings":";;AA+BA,SAAS,2BAEgB;AACvB,SAAO,gBAAgB;AAAA,IACrB,gBAAgB;AAAA,IAChB,WAAW;AAAA,IACX,UAAU;AAAA,IACV,mBAAmB;AAAA,IACnB,mBAAmB;AAAA,IACnB,QAAQ;AAAA,EAAA,CACT;AACH;AAsCA,MAAM,iBAGF;AAAA,EACF,SAAS;AAAA,EACT,SAAS;AAAA,EACT,UAAU;AAAA,EACV,MAAM;AACR;AAqCO,MAAM,UAAmC;AAAA,EAO9C,YACU,IACR,gBACA;AAFQ,SAAA,KAAA;AAPV,SAAS,QAA8C,IAAI;AAAA,MACzD,yBAAA;AAAA,IAAyB;AAmB3B,SAAA,aAAa,CAAC,eAAqD;AACjE,WAAK,UAAU,EAAE,GAAG,KAAK,SAAS,GAAG,WAAA;AAGrC,UAAI,CAAC,KAAK,eAAe;AACvB,aAAK,OAAA;AAAA,MAAO;AAAA,IACd;AAGF,SAAA,YAAY,CAAC,aAAiD;AAC5D,WAAK,MAAM,SAAS,CAAC,UAAU;AAC7B,cAAM,gBAAgB;AAAA,UACpB,GAAG;AAAA,UACH,GAAG;AAAA,QAAA;AAEL,cAAM,EAAE,cAAc;AACtB,eAAO;AAAA,UACL,GAAG;AAAA,UACH,QAAQ,CAAC,KAAK,gBACV,aACA,YACE,YACA;AAAA,QAAA;AAAA,MACR,CACD;AAAA,IAAA;AAGH,SAAA,cAAc,MAAe;AAC3B,aAAO,CAAC,CAAC,qBAAqB,KAAK,QAAQ,SAAS,IAAI;AAAA,IAAA;AAG1D,SAAA,WAAW,MAAc;AACvB,aAAO,qBAAqB,KAAK,QAAQ,MAAM,IAAI;AAAA,IAAA;AAyBrD,SAAA,eAAe,IAAI,SAAgC;AACjD,YAAM,MAAM,KAAK,IAAA;AACjB,YAAM,yBAAyB,MAAM,KAAK,MAAM,MAAM;AACtD,YAAM,OAAO,KAAK,SAAA;AAGlB,UAAI,KAAK,QAAQ,WAAW,0BAA0B,MAAM;AAC1D,aAAK,SAAS,GAAG,IAAI;AAAA,MAAA,OAChB;AAEL,aAAK,UAAU;AAAA,UACb,UAAU;AAAA,QAAA,CACX;AAED,YAAI,CAAC,KAAK,cAAc,KAAK,QAAQ,UAAU;AAE7C,gBAAM,0BAA0B,KAAK,MAAM,MAAM,oBAC7C,MAAM,KAAK,MAAM,MAAM,oBACvB;AACJ,gBAAM,kBAAkB,OAAO;AAC/B,eAAK,UAAU,EAAE,WAAW,KAAA,CAAM;AAClC,eAAK,aAAa,WAAW,MAAM;AACjC,kBAAM,EAAE,SAAA,IAAa,KAAK,MAAM;AAChC,gBAAI,aAAa,QAAW;AAC1B,mBAAK,SAAS,GAAG,QAAQ;AAAA,YAAA;AAAA,UAC3B,GACC,eAAe;AAAA,QAAA;AAAA,MACpB;AAAA,IACF;AAGF,SAAA,WAAW,IAAI,SAAgC;AAC7C,UAAI,CAAC,KAAK,cAAe;AACzB,WAAK,GAAG,GAAG,IAAI;AACf,YAAM,oBAAoB,KAAK,IAAA;AAC/B,YAAM,oBAAoB,oBAAoB,KAAK,SAAA;AACnD,WAAK,cAAA;AACL,WAAK,UAAU;AAAA,QACb,gBAAgB,KAAK,MAAM,MAAM,iBAAiB;AAAA,QAClD;AAAA,QACA;AAAA,QACA,WAAW;AAAA,QACX,UAAU;AAAA,MAAA,CACX;AACD,WAAK,QAAQ,YAAY,IAAI;AAC7B,iBAAW,MAAM;AACf,YAAI,CAAC,KAAK,MAAM,MAAM,WAAW;AAC/B,eAAK,UAAU,EAAE,mBAAmB,OAAA,CAAW;AAAA,QAAA;AAAA,MACjD,GACC,KAAK,UAAU;AAAA,IAAA;AAMpB,SAAA,QAAQ,MAAY;AAClB,UAAI,KAAK,MAAM,MAAM,aAAa,KAAK,MAAM,MAAM,UAAU;AAC3D,aAAK,SAAS,GAAG,KAAK,MAAM,MAAM,QAAQ;AAAA,MAAA;AAAA,IAC5C;AAGF,SAAA,gBAAgB,MAAY;AAC1B,UAAI,KAAK,YAAY;AACnB,qBAAa,KAAK,UAAU;AAC5B,aAAK,aAAa;AAAA,MAAA;AAAA,IACpB;AAYF,SAAA,SAAS,MAAY;AACnB,WAAK,cAAA;AACL,WAAK,UAAU;AAAA,QACb,UAAU;AAAA,QACV,WAAW;AAAA,MAAA,CACZ;AAAA,IAAA;AAMH,SAAA,QAAQ,MAAY;AAClB,WAAK,UAAU,0BAA+B;AAAA,IAAA;AA5J9C,SAAK,UAAU;AAAA,MACb,GAAG;AAAA,MACH,GAAG;AAAA,IAAA;AAEL,SAAK,UAAU,KAAK,QAAQ,gBAAgB,CAAA,CAAE;AAAA,EAAA;AAAA,EAVhD;AAAA,EAyBA;AAAA,EAkBA;AAAA,EAIA;AAAA,EAyDA;AAAA,EA8BA;AA8BF;AAoCO,SAAS,SACd,IACA,gBACA;AACA,QAAM,YAAY,IAAI,UAAU,IAAI,cAAc;AAClD,SAAO,UAAU;AACnB;"}

package.json

 {
   "name": "@tanstack/pacer",
-  "version": "0.10.0",
+  "version": "0.11.0",
   "description": "Utilities for debouncing, throttling, rate-limiting, queuing, and more.",
@@ -5,0 +5,0 @@ "author": "Tanner Linsley",

src/async-debouncer.ts

@@ -316,2 +316,3 @@ import { Store } from '@tanstack/store'
         isPending: false,
+        lastArgs: undefined,
         settleCount: this.store.state.settleCount + 1,
@@ -318,0 +319,0 @@ })

src/async-throttler.ts

@@ -33,3 +33,3 @@ import { Store } from '@tanstack/store'
    */
-  nextExecutionTime: number
+  nextExecutionTime: number | undefined
   /**
@@ -59,3 +59,3 @@ * Number of function executions that have completed (either successfully or with errors)
     lastResult: undefined,
-    nextExecutionTime: 0,
+    nextExecutionTime: undefined,
     settleCount: 0,
@@ -351,2 +351,7 @@ status: 'idle',
       this.options.onSettled?.(this)
+      setTimeout(() => {
+        if (!this.store.state.isPending) {
+          this.#setState({ nextExecutionTime: undefined })
+        }
+      }, this.#getWait())
     }
@@ -353,0 +358,0 @@ return this.store.state.lastResult

src/debouncer.ts

@@ -216,4 +216,5 @@ import { Store } from '@tanstack/store'
     this.#setState({
+      executionCount: this.store.state.executionCount + 1,
       isPending: false,
-      executionCount: this.store.state.executionCount + 1,
+      lastArgs: undefined,
     })
@@ -220,0 +221,0 @@ this.options.onExecute?.(this)

src/throttler.ts

@@ -25,3 +25,3 @@ import { Store } from '@tanstack/store'
    */
-  nextExecutionTime: number
+  nextExecutionTime: number | undefined
   /**
@@ -250,2 +250,7 @@ * Current execution status - 'idle' when not active, 'pending' when waiting for timeout
     this.options.onExecute?.(this)
+    setTimeout(() => {
+      if (!this.store.state.isPending) {
+        this.#setState({ nextExecutionTime: undefined })
+      }
+    }, this.#getWait())
   }
@@ -252,0 +257,0 @@

No alert changes

Improved metrics

Total package byte prevSize

863556

0.31%

Lines of code

10623

0.34%

No dependency changes