tiny-decoders - npm Package Compare versions

Comparing version 5.0.0 to 6.0.0

index.d.ts

@@ -1,108 +0,134 @@
-// TODO: TypeScript Version: 3.0
-// Waiting for https://github.com/Microsoft/dtslint/issues/137
-// Remove the `--onlyTestTsNext` workaround from `npm run dtslint`.
-
-// Turn off automatic exporting.
-export {};
-
-export type Decoder<T> = (value: unknown, errors?: Array<string>) => T;
-
-type RequiredKeys<T> = {
-  [P in keyof T]: undefined extends T[P] ? never : P;
+export declare type Decoder<T, U = unknown> = (value: U, errors?: Array<DecoderError>) => T;
+declare type WithUndefinedAsOptional<T> = T extends Record<string, unknown> ? Expand<{
+    [P in OptionalKeys<T>]?: T[P];
+} & {
+    [P in RequiredKeys<T>]: T[P];
+}> : T;
+declare type RequiredKeys<T> = {
+    [P in keyof T]: undefined extends T[P] ? never : P;
 }[keyof T];
-
-type OptionalKeys<T> = {
-  [P in keyof T]: undefined extends T[P] ? P : never;
+declare type OptionalKeys<T> = {
+    [P in keyof T]: undefined extends T[P] ? P : never;
 }[keyof T];
-
-// Make VSCode show `{ a: string; b?: number }` instead of `{ a: string } & { b?: number }`.
-type Merge<T> = { [P in keyof T]: T[P] };
-
-export type WithUndefinedAsOptional<T> = Merge<
-  { [P in RequiredKeys<T>]: T[P] } & { [P in OptionalKeys<T>]?: T[P] }
->;
-
-export function boolean(value: unknown): boolean;
-
-export function number(value: unknown): number;
-
-export function string(value: unknown): string;
-
-export function constant<
-  T extends boolean | number | string | undefined | null
->(constantValue: T): (value: unknown) => T;
-
-export function array<T, U = T>(
-  decoder: Decoder<T>,
-  mode?: "throw" | "skip" | { default: U }
-): Decoder<Array<T | U>>;
-
-export function dict<T, U = T>(
-  decoder: Decoder<T>,
-  mode?: "throw" | "skip" | { default: U }
-): Decoder<{ [key: string]: T | U }>;
-
-export function fields<T>(
-  callback: (
-    field: <U, V = U>(
-      key: string | number,
-      decoder: Decoder<U>,
-      mode?: "throw" | { default: V }
-    ) => U | V,
-    fieldError: (key: string | number, message: string) => TypeError,
-    obj: { readonly [key: string]: unknown },
-    errors?: Array<string>
-  ) => T
-): Decoder<T>;
-
-export function pair<T1, T2>(
-  decoder1: Decoder<T1>,
-  decoder2: Decoder<T2>
-): Decoder<[T1, T2]>;
-
-export function triple<T1, T2, T3>(
-  decoder1: Decoder<T1>,
-  decoder2: Decoder<T2>,
-  decoder3: Decoder<T3>
-): Decoder<[T1, T2, T3]>;
-
-export function autoRecord<T>(
-  mapping: { [P in keyof T]: Decoder<T[P]> }
-): Decoder<T>;
-
-export function deep<T>(
-  path: Array<string | number>,
-  decoder: Decoder<T>
-): Decoder<T>;
-
-export function optional<T>(decoder: Decoder<T>): Decoder<T | undefined>;
-export function optional<T, U>(
-  decoder: (value: unknown) => T,
-  defaultValue: U
-): (value: unknown) => T | U;
-
-export function map<T, U>(
-  decoder: Decoder<T>,
-  fn: (value: T, errors?: Array<string>) => U
-): Decoder<U>;
-
-export function either<T, U>(
-  decoder1: Decoder<T>,
-  decoder2: Decoder<U>
-): Decoder<T | U>;
-
-export function lazy<T>(callback: () => Decoder<T>): Decoder<T>;
-
-export const repr: {
-  (
-    value: unknown,
-    options?: {
-      recurse?: boolean;
-      maxArrayChildren?: number;
-      maxObjectChildren?: number;
-      maxLength?: number;
-      recurseMaxLength?: number;
-    }
-  ): string;
-  sensitive: boolean;
+declare type Expand<T> = T extends infer O ? {
+    [K in keyof O]: O[K];
+} : never;
+export declare function boolean(value: unknown): boolean;
+export declare function number(value: unknown): number;
+export declare function string(value: unknown): string;
+export declare function stringUnion<T extends Record<string, null>>(mapping: keyof T extends string ? keyof T extends never ? "stringUnion must have at least one key" : T : {
+    [P in keyof T]: P extends number ? "stringUnion keys must be strings, not numbers" : T[P];
+}): Decoder<keyof T>;
+export declare function array<T, U = never>(decoder: Decoder<T>, { mode }?: {
+    mode?: "skip" | "throw" | {
+        default: U;
+    };
+}): Decoder<Array<T | U>>;
+export declare function record<T, U = never>(decoder: Decoder<T>, { mode }?: {
+    mode?: "skip" | "throw" | {
+        default: U;
+    };
+}): Decoder<Record<string, T | U>>;
+export declare function fields<T>(callback: (field: <U, V = never>(key: string, decoder: Decoder<U>, options?: {
+    mode?: "throw" | {
+        default: V;
+    };
+}) => U | V, object: Record<string, unknown>, errors?: Array<DecoderError>) => T, { exact, allow, }?: {
+    exact?: "allow extra" | "push" | "throw";
+    allow?: "array" | "object";
+}): Decoder<WithUndefinedAsOptional<T>>;
+export declare function fieldsAuto<T extends Record<string, unknown>>(mapping: {
+    [P in keyof T]: P extends "__proto__" ? never : Decoder<T[P]>;
+}, { exact }?: {
+    exact?: "allow extra" | "push" | "throw";
+}): Decoder<WithUndefinedAsOptional<T>>;
+declare type Values<T> = T[keyof T];
+export declare function fieldsUnion<T extends Record<string, Decoder<unknown>>>(key: string, mapping: keyof T extends string ? keyof T extends never ? "fieldsUnion must have at least one member" : T : {
+    [P in keyof T]: P extends number ? "fieldsUnion keys must be strings, not numbers" : T[P];
+}): Decoder<Expand<Values<{
+    [P in keyof T]: T[P] extends Decoder<infer U, infer _> ? U : never;
+}>>>;
+export declare function tuple<T extends ReadonlyArray<unknown>>(mapping: readonly [...{
+    [P in keyof T]: Decoder<T[P]>;
+}]): Decoder<[...T]>;
+export declare function multi<T1 = never, T2 = never, T3 = never, T4 = never, T5 = never, T6 = never, T7 = never>(mapping: {
+    undefined?: Decoder<T1, undefined>;
+    null?: Decoder<T2, null>;
+    boolean?: Decoder<T3, boolean>;
+    number?: Decoder<T4, number>;
+    string?: Decoder<T5, string>;
+    array?: Decoder<T6, Array<unknown>>;
+    object?: Decoder<T7, Record<string, unknown>>;
+}): Decoder<T1 | T2 | T3 | T4 | T5 | T6 | T7>;
+export declare function optional<T>(decoder: Decoder<T>): Decoder<T | undefined>;
+export declare function optional<T, U>(decoder: Decoder<T>, defaultValue: U): Decoder<T | U>;
+export declare function nullable<T>(decoder: Decoder<T>): Decoder<T | null>;
+export declare function nullable<T, U>(decoder: Decoder<T>, defaultValue: U): Decoder<T | U>;
+export declare function chain<T, U>(decoder: Decoder<T>, next: Decoder<U, T>): Decoder<U>;
+export declare type DecoderErrorVariant = {
+    tag: "custom";
+    message: string;
+    got: unknown;
+} | {
+    tag: "exact fields";
+    knownFields: Array<string>;
+    got: Array<string>;
+} | {
+    tag: "tuple size";
+    expected: number;
+    got: number;
+} | {
+    tag: "unknown fieldsUnion tag";
+    knownTags: Array<string>;
+    got: string;
+} | {
+    tag: "unknown multi type";
+    knownTypes: Array<"array" | "boolean" | "null" | "number" | "object" | "string" | "undefined">;
+    got: unknown;
+} | {
+    tag: "unknown stringUnion variant";
+    knownVariants: Array<string>;
+    got: string;
+} | {
+    tag: "array";
+    got: unknown;
+} | {
+    tag: "boolean";
+    got: unknown;
+} | {
+    tag: "number";
+    got: unknown;
+} | {
+    tag: "object";
+    got: unknown;
+} | {
+    tag: "string";
+    got: unknown;
 };
+declare type Key = number | string;
+export declare class DecoderError extends TypeError {
+    path: Array<Key>;
+    variant: DecoderErrorVariant;
+    nullable: boolean;
+    optional: boolean;
+    constructor({ key, ...params }: {
+        message: string;
+        value: unknown;
+        key?: Key;
+    } | (DecoderErrorVariant & {
+        key?: Key;
+    }));
+    static MISSING_VALUE: symbol;
+    static at(error: unknown, key?: Key): DecoderError;
+    format(options?: ReprOptions): string;
+}
+export declare type ReprOptions = {
+    recurse?: boolean;
+    maxArrayChildren?: number;
+    maxObjectChildren?: number;
+    maxLength?: number;
+    recurseMaxLength?: number;
+    sensitive?: boolean;
+};
+export declare function repr(value: unknown, { recurse, maxArrayChildren, maxObjectChildren, maxLength, recurseMaxLength, sensitive, }?: ReprOptions): string;
+export {};

package.json

 {
   "name": "tiny-decoders",
-  "version": "5.0.0",
+  "version": "6.0.0",
   "license": "MIT",
@@ -8,7 +8,11 @@ "author": "Simon Lydell",
   "description": "Type-safe data decoding for the minimalist.",
-  "type": "commonjs",
-  "module": "index.mjs",
-  "exports": "./index.mjs",
+  "type": "module",
+  "main": "./index.cjs",
+  "module": "./index.mjs",
+  "exports": {
+    "require": "./index.cjs",
+    "import": "./index.mjs"
+  },
   "sideEffects": false,
-  "keywords": ["decode", "decoders", "elm", "flow", "json", "typescript"]
+  "keywords": ["decode", "decoders", "elm", "json", "typescript"]
 }

README.md

@@ -1,63 +0,5 @@
-# tiny-decoders ![no dependencies][deps-tiny-decoders] [![minified size][min-tiny-decoders]][bundlephobia-tiny-decoders]
+# tiny-decoders ![no dependencies](https://img.shields.io/david/lydell/tiny-decoders.svg) [![minified size](https://img.shields.io/bundlephobia/min/tiny-decoders.svg)](https://bundlephobia.com/result?p=tiny-decoders)
 
-Type-safe data decoding for the minimalist, inspired by [nvie/decoders] and [Elm’s JSON Decoders][elm-json].
+Type-safe data decoding for the minimalist.
 
-Supports [TypeScript] and [Flow].
-
-```ts
-import {
-  Decoder,
-  array,
-  boolean,
-  either,
-  fields,
-  number,
-  optional,
-  string,
-} from "tiny-decoders";
-
-type User = {
-  name: string;
-  active: boolean;
-  age: number | undefined;
-  interests: Array<string>;
-  id: string | number;
-};
-
-const userDecoder = fields(
-  (field): User => ({
-    name: field("full_name", string),
-    active: field("is_active", boolean),
-    age: field("age", optional(number)),
-    interests: field("interests", array(string)),
-    id: field("id", either(string, number)),
-  })
-);
-
-const payload: unknown = getSomeJSON();
-
-const user: User = userDecoder(payload);
-
-/*
-If we get here, `user` is now a valid `User`!
-Otherwise, a `TypeError` is thrown.
-The error can look like this:
-
-    TypeError: object["age"]: (optional) Expected a number, but got: "30"
-*/
-```
-
-[️Full example][example-readme]
-
----
-
-[bundlephobia-tiny-decoders]: https://bundlephobia.com/result?p=tiny-decoders
-[deps-tiny-decoders]: https://img.shields.io/david/lydell/tiny-decoders.svg
-[elm-json]: https://package.elm-lang.org/packages/elm/json/latest/Json-Decode
-[example-readme]: https://github.com/lydell/tiny-decoders/blob/master/examples/readme.test.js
-[flow]: https://flow.org/
-[min-tiny-decoders]: https://img.shields.io/bundlephobia/min/tiny-decoders.svg
-[nvie/decoders]: https://github.com/nvie/decoders
-[typescript]: https://www.typescriptlang.org/
-
-**[➡️ Full readme](https://github.com/lydell/tiny-decoders/)**
+**[➡️ Full readme](https://github.com/lydell/tiny-decoders/#readme)**

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Improved metrics

Lines of code

1072

increased by46.65%

Is type module

Yes

Worsened metrics

Total package byte prevSize

40666

decreased by-2.13%

Number of package files

6

decreased by-14.29%

Number of lines in readme file

5

decreased by-92.06%

No dependency changes