Vitest is a testing framework powered by Vite for JavaScript and TypeScript projects. It can reuse Vite configuration, plugins, resolvers, and transform pipelines, or run without Vite. Its Jest-compatible APIs cover assertions, snapshots, and mocking, which can help teams moving from Jest. Watch mode reruns tests related to changed source or test files, and TypeScript, JSX, and ES modules work out of the box. Browser Mode runs tests in a browser with Playwright and WebdriverIO providers. The framework also supports component testing for Vue, React, Svelte, Lit, Marko, and other frameworks, plus code coverage through V8 or Istanbul and benchmarking powered by Tinybench. Vitest offers an official Visual Studio Code extension and can be tried in a browser through StackBlitz without local installation. It is free and open source. The listed requirements are Vite 6.4.0 or later and Node 22.12.0 or later. Users seeking help can turn to the Vitest Discord community or GitHub Discussions.
Who it is for
Vitest suits JavaScript and TypeScript developers who want testing integrated with Vite or a framework that can run independently. It may also suit teams seeking Jest-compatible APIs or browser and component testing options.
What is good
- Free and open source.
- Can reuse Vite configuration and plugins.
- Jest-compatible APIs cover assertions, snapshots, and mocking.
- Coverage supported through V8 or Istanbul.
- Can try it in StackBlitz without local installation.
What to know first
- Requires Vite 6.4.0 or later.
- Requires Node 22.12.0 or later.
Verdict
Vitest combines Vite-aware workflows with options for browser, component, and coverage testing. Check the stated Vite and Node versions before adopting it.
Vitest plans and pricing
All plansCompared on unit testing frameworks
- Free plan
- Yes
- Snapshot testing
- Yes
- Parallel execution
- Yes
