happy-dom

Testing Library

testing-library/react-testing-library

Popular

User-centric DOM testing utilities for React, Vue, Angular and Svelte that query like users do.

Storybook

storybookjs/storybook

Popular

Workshop for building, documenting and testing UI components in isolation.

jsdom

jsdom/jsdom

Popular

Pure-JS implementation of web standards used as the default simulated DOM for Jest and Vitest tests.

Vue Test Utils

vuejs/test-utils

Official component testing utility library for Vue 3, used with Vitest or Jest.

Ladle

tajo/ladle

Lightweight, Vite-powered Storybook alternative for developing and testing React stories.

Enzyme

enzymejs/enzyme

Legacy

Former React component testing utility with no official adapters for React 18+; migrate to Testing Library.