Mock Service Worker ORG

Industry standard API mocking for JavaScript.

A JavaScript library that intercepts outgoing API requests in the browser and Node.js and returns fake responses you define, so the same mock handlers work in unit tests, integration tests, and local development.

Examples of Mock Service Worker usage with various frameworks and libraries.

Data querying library for testing JavaScript applications.

Low-level network interception library.

Mock API requests in Storybook with Mock Service Worker.

Spawn an HTTP server from your request handlers or apply them to an existing server using a middleware.

Mock APIs in Playwright using Mock Service Worker.

Generate MSW request handlers from various sources (HAR files, OpenAPI documents, etc).

Official website and documentation for the Mock Service Worker library.

A superset of the JSDOM environment for Jest that respects Node.js globals.

Develop and test Cloudflare applications with Mock Service Worker.

A Fetch API "Headers" polyfill and transformation library.

Matches a URL against a path. Parameters, wildcards, RegExp.

Persistence and live synchronization layer for testing JavaScript applications.

Manage request/response cookies in the environments where those are not supported.

Binding to mock Socket.IO connections with Mock Service Worker.

Reliably determines if the code is running in Node.js. Treats Jest, React Native, Electron, and others like Node.js.

Automate repetitive and painful MSW migrations & breaking changes.

A test repository that is going to disappear.

Mock Service Worker community bot. Beep. Bop.

Utilities for working with URLs.

The "localStorage" polyfill for Node.js.

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Mock Service Worker organization GitHub files.