tiny-use-debounce

Tiny Use Debounce

React hooks for debouncing and throttling.

Features

• Tiny Size
• Highly customizable
• Fully tested
• TypeScript support out of the box

Installation

# npm
npm i tiny-use-debounce

# yarn
yarn add tiny-use-debounce

Usage

import { useDebounce, useThrottle } from "tiny-use-debounce";
import { debounce, throttle } from "lodash-es";

const App = () => {
  const debouncedMouseMove = useDebounce(() => console.log("mouse move"), 300);
  const throttledScroll = useDebounce(() => console.log("scroll"), 300);

  return (
    <div onMouseMove={debouncedMouseMove} onScroll={throttledScroll}>
      {/* ... */}
    </div>
  );
};

Customizing

This library uses its own implementations of debounce and throttle functions. But in some cases, you may want to change it (not enough options, smaller bundle size, etc.). For this purpose, you could use createDebounceHook:

import { createDebounceHook } from "tiny-use-debounce";
import { debounce, throttle } from "lodash";

const useDebounce = createDebounceHook(debounce);
const useThrottle = createDebounceHook(throttle);

const options = {
  leading: true,
};

const App = () => {
  const debouncedFn = useDebounce(() => console.log("here"), 100, options);
  const throttledFn = useThrottle(() => console.log("here"), 100, options);
  // ...
};

Memoization

By default, functions returned from hooks will always be memoized.

const debouncedFn = useDebounce(() => {
  /* ... */
}, 100);

useEffect(() => {
  /* ... */
}, [
  //could be safely used as a dependency since reference will never change
  debounceFn,
]);

But if you create your own hook with createDebounceHook, you need to be a little more cautious. The first argument (the callback) will not make any effect on memoization. But other arguments will be compared referentially. So if your debounce implementation uses objects as options they need to be declared outside of the component or memoized. Take a look at the example below:

import { createDebounceHook } from "tiny-use-debounce";
import { debounce, throttle } from "lodash";

const useDebounce = createDebounceHook(debounce);

const stableOptions = { leading: true };

const App = () => {
  const options = { leading: true };

  // this function will be recreated on each rerender
  // because options object has new reference
  const debounceFn1 = useDebounce(
    () => {
      /* ... */
    },
    100,
    options
  );

  // this function will always have the same reference
  // because all additional arguments have the same
  // reference between renders
  const debounceFn2 = useDebounce(
    () => {
      /* ... */
    },
    100,
    stableOptions
  );

  const [leading, setLeading] = useState(true);
  const memoOptions = useMemo(() => ({ leading }), [leading]);

  // this function will only update when `leading`
  // changes, other updates will not break memoization
  const debounceFn3 = useDebounce(
    () => {
      /* ... */
    },
    100,
    memoOptions
  );
};

API

useDebounce

Creates debounced function.

Usage:

• useDebounce(cb, wait)

Type:

function useDebounce<
  Callback extends AnyFunction
>(
  cb: Callback,
  wait: number
) => ((...args: Parameters<Callback>) => void) & {
  cancel: () => void;
};

useThrottle

Creates throttled function.

Usage:

• useThrottle(cb, wait)

Type:

function useDebounce<
  Callback extends AnyFunction
>(
  cb: Callback,
  wait: number
) => ((...args: Parameters<Callback>) => void) & {
  cancel: () => void;
};

createDebounceHook

Creates hook that uses proved function for debouncing.

Usage:

• createDebounceHook(debounce)

Type:

function createDebounceHook<DebounceFn extends AnyFunction>(
  debounce: DebounceFn
): <Callback extends AnyFunction>(
  cb: Callback,
  ...rest: Tail<Parameters<DebounceFn>>
) => DebounceFunction<Callback, DebounceFn>;

License

MIT