vitest

Run Jest-compatible unit tests for Vite projects with TypeScript support.

Updated Jan 29, 2026
One-click install
npx skills add https://github.com/cfardev/kanban-hub --skill vitest-cfardev
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: vitest
Source: https://github.com/cfardev/kanban-hub/tree/main/.agents/skills/vitest
Command: npx skills add https://github.com/cfardev/kanban-hub --skill vitest-cfardev

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Vitest provides fast, Jest-compatible unit testing for modern web apps built with Vite, enabling quick feedback during development.

Core Features & Use Cases

  • Fast, Vite-native test execution with instant feedback and HMR-like updates
  • Jest-compatible API with native ESM, TypeScript, and JSX support
  • Supports fixtures, snapshots, mocks, and multi-project testing for scalable suites

Quick Start

Install dependencies and run Vitest to start testing immediately.

Frequently Asked Questions about vitest

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

FAQPage Schema
How do I set up unit testing for a Vite project?

Vitest provides fast, Jest-compatible unit testing for Vite projects. You configure it using vitest.config.ts to enable native ESM, TypeScript, and JSX support with instant feedback during development.

Can I migrate my Jest tests to a Vite-native test runner?

Yes, you can migrate Jest tests to Vitest because it offers a Jest-compatible API. It supports native ESM, TypeScript, mocks, and advanced hooks while providing faster Vite-native execution.

Does unit testing with Vitest support TypeScript and native ESM?

Vitest natively supports TypeScript and ESM for unit testing. It leverages your existing Vite configuration to execute tests seamlessly without requiring additional transpilation setup.

What is the best way to run concurrent unit tests across multiple projects?

Vitest supports multi-project setups to run concurrent unit tests efficiently. By configuring projects in vitest.config.ts, you can execute scalable test suites across multiple packages simultaneously.

How do fixtures and mocks work in modern web app testing?

Vitest uses fixtures and mocks to isolate dependencies during unit testing. They integrate with advanced hooks to simulate modules and manage test data for reliable, scalable suites.