vitest

Provides Jest-compatible testing for Vite-based projects with TypeScript, ESM, and JSX support.

2|Updated Feb 13, 2026

Search Tags:#typescript #vitest #testing #vite #esm #jest-compatible

Ready to run

npx skills add https://github.com/yutna/vibe-next-template --skill vitest-yutna

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: vitest
Source: https://github.com/yutna/vibe-next-template/tree/main/.agents/skills/vitest
Command: npx skills add https://github.com/yutna/vibe-next-template --skill vitest-yutna

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Vitest delivers fast, modern testing for Vite-based projects, providing a Jest-compatible API and seamless TypeScript, ES Module, and JSX support.

Core Features & Use Cases

Vite-native test runner with fast updates for rapid feedback
Jest-compatible API for easy migration and familiar assertions
TypeScript, native ESM, and JSX support out of the box
Snapshot testing, mocking, and built-in coverage for end-to-end quality
Ideal for unit, integration, and UI testing in frontend stacks

Quick Start

Install Vitest in your project and run tests to start validating your code during development.

Frequently Asked Questions about vitest

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I run Jest-compatible tests in a Vite project?▼

Vitest provides Jest-compatible testing for Vite projects, offering a familiar API for assertions and rapid feedback. It allows seamless migration from Jest while leveraging Vite's native ESM and TypeScript support.

Does Vitest support TypeScript and native ESM out of the box?▼

Yes, Vitest supports TypeScript, native ESM, and JSX out of the box for frontend testing. It leverages Vite's transformation pipeline to handle modern JavaScript syntax without requiring additional configuration.

How do I configure testing for a Vite application using vite.config.ts?▼

You can configure testing through vite.config.ts or a dedicated vitest.config.ts file. Vitest reads your Vite configuration directly, ensuring your test environment matches your application's build setup and plugin ecosystem.

Can I use snapshot testing and mocking for unit and integration tests?▼

Yes, Vitest includes built-in snapshot testing and mocking capabilities for unit and integration tests. It also provides built-in coverage reporting to help measure end-to-end code quality across your frontend stack.

What is the best way to migrate from Jest to a Vite-native test runner?▼

The best way to migrate is using Vitest, which offers a Jest-compatible API for easy transition. You get Vite-native test execution with fast updates while keeping your familiar Jest assertions and test structure.