vitest

Run unit tests for Vite-based JavaScript and TypeScript projects.

Updated Feb 28, 2026
One-click install
npx skills add https://github.com/raphaelmans/agent-skills --skill vitest-raphaelmans
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: vitest
Source: https://github.com/raphaelmans/agent-skills/tree/main/vitest
Command: npx skills add https://github.com/raphaelmans/agent-skills --skill vitest-raphaelmans

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Vitest speeds up unit testing for Vite-based projects.

Core Features & Use Cases

  • Jest-compatible API, native Vite integration, and fast feedback across JS/TS projects.
  • Built-in coverage, mocks, and fixtures to streamline test workflows.
  • Use Case: Easily test components and utilities in frontend apps with deterministic results.

Quick Start

Install Vitest in your project and run it with the vitest CLI to start testing.

Frequently Asked Questions about vitest

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

FAQPage Schema
How do I run unit tests for a Vite project using a Jest-compatible API?

You can speed up unit testing for Vite-based projects by installing Vitest and running the vitest CLI, which provides a Jest-compatible API and Vite-native transforms for fast feedback across JavaScript and TypeScript projects.

What is the best way to get deterministic results when testing frontend components and utilities?

The best way to achieve deterministic results when testing frontend components and utilities is to use Vitest, which provides built-in coverage, mocks, and fixtures to streamline test workflows in Vite-based applications.

Does Vitest support TypeScript out of the box for unit testing?

Yes, Vitest supports TypeScript out of the box, offering Vite-native transforms and fast feedback for development and continuous integration across both JavaScript and TypeScript projects.

Can I use fixtures and mocking to build scalable testing workflows in Vitest?

Yes, you can use built-in fixtures and mocking in Vitest to support robust, scalable testing workflows, alongside built-in coverage and test filtering to streamline the development process.

Why choose Vitest over other Jest-compatible testing frameworks for Vite?

You should choose Vitest over other Jest-compatible frameworks for Vite because it offers native Vite integration, delivering faster feedback and optimized transforms for modern frontend applications without requiring complex configuration.