mswjs/msw

Industry standard API mocking for JavaScript.

TypeScript

17708

583

MIT License

Mock Service Worker (MSW) is an industry-standard API mocking library for JavaScript that intercepts network requests on the browser or Node.js level, allowing developers to mock API responses without modifying application code. It's designed for frontend developers, QA engineers, and teams who need reliable API mocking for development, testing, and debugging while maintaining production-like behavior.

Total donated

Undistributed

Share with your subscribers:

Recipients

How the donated funds are distributed

Support the dependencies of mswjs/msw

SBoudrias/Inquirer.js

Inquirer confirm prompt

mswjs/interceptors

Low-level HTTP/HTTPS/XHR/fetch request interception library.

open-draft/deferred-promise

A Promise-compatible abstraction that defers resolving/rejecting promises to another closure.

DefinitelyTyped/DefinitelyTyped

TypeScript definitions for statuses

graphql/graphql-js

A Query Language and Runtime which can target any service.

mswjs/headers-polyfill

A native "Headers" class polyfill.

mswjs/is-node-process

Reliably determines if the code is running in Node.js

open-draft/outvariant

Type-safe implementation of invariant with positionals.

pillarjs/path-to-regexp

Express style path to RegExp utility

kettanaito/rettime

A type-safe marriage of `EventTarget` and `EventEmitter`.

open-draft/strict-event-emitter

Type-safe implementation of EventEmitter for browser and Node.js

salesforce/tough-cookie

RFC6265 Cookies and Cookie Jar for node.js

kettanaito/until-async

Gracefully handle a Promise using async/await.

yargs/yargs

yargs the modern, pirate-themed, successor to optimist.

conventional-changelog/commitlint

Lint your commit messages

conventional-changelog/commitlint

Shareable commitlint config enforcing conventional commits

epicweb-dev/test-server

Utility for creating HTTP and WebSocket servers for testing

eslint/eslint

ESLint JavaScript language implementation

fastify/fastify-websocket

basic websocket support for fastify

dotansimha/graphql-typed-document-node

open-draft/test-server

HTTP/HTTPS testing server for your tests.

ossjs/release

Minimalistic, opinionated, and predictable release automation tool.

microsoft/playwright

A high-level API to automate web browsers

DefinitelyTyped/DefinitelyTyped

TypeScript definitions for express

DefinitelyTyped/DefinitelyTyped

TypeScript definitions for json-bigint

DefinitelyTyped/DefinitelyTyped

TypeScript definitions for node

microsoft/TypeScript-DOM-Lib-Generator

Types for the global scope of Service Workers

typescript-eslint/typescript-eslint

TypeScript plugin for ESLint

typescript-eslint/typescript-eslint

An ESLint custom parser which leverages TypeScript ESTree

modernweb-dev/web

Dev server for web applications

axios/axios

Promise based HTTP client for the browser and node.js

commitizen/cz-cli

Git commit, but play nice with conventions.

kentcdodds/cross-env

Run scripts that set and use environment variables across platforms

lquixada/cross-fetch

Universal WHATWG Fetch API for Node, Browsers and React Native

commitizen/cz-conventional-changelog

Commitizen adapter following the conventional-changelog format.

evanw/esbuild

An extremely fast JavaScript and CSS bundler and minifier.

prettier/eslint-plugin-prettier

Runs prettier as an eslint rule

fastify/fastify

Fast and low overhead web framework, for Node.js

kettanaito/fs-teardown

Teardown API for testing file system-dependent code.

isaacs/node-glob

the most correct and second fastest glob implementation in JavaScript

Support the dependencies

Support the repos that depend on mswjs/msw

Top contributors

kettanaito

1329 contributions

34 contributions

28 contributions

17 contributions

17 contributions

14 contributions

12 contributions

8 contributions

8 contributions

6 contributions

Recent events

Kivach works on the Obyte network, and therefore you can track all donations.

No events yet

Support the dependencies of mswjs/msw

SBoudrias/Inquirer.js

Inquirer confirm prompt

mswjs/interceptors

Low-level HTTP/HTTPS/XHR/fetch request interception library.

open-draft/deferred-promise

A Promise-compatible abstraction that defers resolving/rejecting promises to another closure.

DefinitelyTyped/DefinitelyTyped

TypeScript definitions for statuses

graphql/graphql-js

A Query Language and Runtime which can target any service.

mswjs/headers-polyfill

A native "Headers" class polyfill.

mswjs/is-node-process

Reliably determines if the code is running in Node.js

open-draft/outvariant

Type-safe implementation of invariant with positionals.

pillarjs/path-to-regexp

Express style path to RegExp utility

kettanaito/rettime

A type-safe marriage of `EventTarget` and `EventEmitter`.

open-draft/strict-event-emitter

Type-safe implementation of EventEmitter for browser and Node.js

salesforce/tough-cookie

RFC6265 Cookies and Cookie Jar for node.js

kettanaito/until-async

Gracefully handle a Promise using async/await.

yargs/yargs

yargs the modern, pirate-themed, successor to optimist.

conventional-changelog/commitlint

Lint your commit messages

conventional-changelog/commitlint

Shareable commitlint config enforcing conventional commits

epicweb-dev/test-server

Utility for creating HTTP and WebSocket servers for testing

eslint/eslint

ESLint JavaScript language implementation

fastify/fastify-websocket

basic websocket support for fastify

dotansimha/graphql-typed-document-node

open-draft/test-server

HTTP/HTTPS testing server for your tests.

ossjs/release

Minimalistic, opinionated, and predictable release automation tool.

microsoft/playwright

A high-level API to automate web browsers

DefinitelyTyped/DefinitelyTyped

TypeScript definitions for express

DefinitelyTyped/DefinitelyTyped

TypeScript definitions for json-bigint

DefinitelyTyped/DefinitelyTyped

TypeScript definitions for node

microsoft/TypeScript-DOM-Lib-Generator

Types for the global scope of Service Workers

typescript-eslint/typescript-eslint

TypeScript plugin for ESLint

typescript-eslint/typescript-eslint

An ESLint custom parser which leverages TypeScript ESTree

modernweb-dev/web

Dev server for web applications

axios/axios

Promise based HTTP client for the browser and node.js

commitizen/cz-cli

Git commit, but play nice with conventions.

kentcdodds/cross-env

Run scripts that set and use environment variables across platforms

lquixada/cross-fetch

Universal WHATWG Fetch API for Node, Browsers and React Native

commitizen/cz-conventional-changelog

Commitizen adapter following the conventional-changelog format.

evanw/esbuild

An extremely fast JavaScript and CSS bundler and minifier.

prettier/eslint-plugin-prettier

Runs prettier as an eslint rule

fastify/fastify

Fast and low overhead web framework, for Node.js

kettanaito/fs-teardown

Teardown API for testing file system-dependent code.

isaacs/node-glob

the most correct and second fastest glob implementation in JavaScript