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What is Vitest?
Vitest is a powerful testing framework built natively for Vite, enabling developers to harness the speed and flexibility of modern build tools directly within their testing environment. Out of the box, it provides seamless support for ESM, TypeScript, and JSX through esbuild, making it ideal for contemporary web projects.
With compatibility for Jest features such as expect, snapshot, and coverage, Vitest makes migration straightforward for existing projects. Its smart watch mode ensures rapid feedback by re-executing only related tests upon changes, optimizing the developer workflow for greater productivity and consistency.
Features
- Vite Powered: Seamless integration with Vite's configuration and plugins.
- Jest Compatible: Supports expect, snapshot, and coverage for easy migration.
- Smart Watch Mode: Instantly reruns tests relevant to code changes.
- ESM, TypeScript, JSX Support: Native support powered by esbuild.
- Open Source: Completely free and community-supported.
Use Cases
- Testing Vite-powered web applications
- Migrating tests from Jest to a modern testing framework
- Running instant unit or integration tests during development
- Writing tests for TypeScript and JSX codebases
- Enhancing test automation pipelines for frontend projects
FAQs
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Is Vitest compatible with Jest?
Yes, Vitest offers compatibility with Jest features such as expect, snapshot, and coverage, making migration simple. -
What languages does Vitest support?
Vitest supports modern JavaScript, TypeScript, and JSX out-of-the-box through esbuild. -
Is Vitest free to use?
Yes, Vitest is completely free and open source, available under the MIT license.
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Vitest Uptime Monitor
Average Uptime
100%
Average Response Time
110.72 ms
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