vitest

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

3|1|Updated Feb 2, 2026
One-click install
npx skills add https://github.com/HouseGarofalo/claude-code-base --skill vitest-housegarofalo
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: vitest
Source: https://github.com/HouseGarofalo/claude-code-base/tree/main/.claude/skills/vitest
Command: npx skills add https://github.com/HouseGarofalo/claude-code-base --skill vitest-housegarofalo

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill provides a rapid and efficient way to write and run unit tests for JavaScript and TypeScript projects, significantly speeding up the development feedback loop.

Core Features & Use Cases

  • Blazing Fast Execution: Leverages Vite for instant Hot Module Replacement (HMR) and quick test runs.
  • Jest Compatibility: Offers a familiar API, making migration from Jest seamless.
  • Modern Framework Support: Ideal for testing modern frontend applications built with React, Vue, Svelte, and more.

Quick Start

Run vitest in your project's terminal to start the test runner in watch mode.

Frequently Asked Questions about vitest

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

FAQPage Schema
How do I run fast unit tests for a Vite-based JavaScript or TypeScript project?

You can run fast unit tests for a Vite-based JavaScript or TypeScript project by using a Vite-native test runner that provides instant Hot Module Replacement and executes via the `vitest` command in your terminal.

Can I migrate my Jest unit tests to a Vite-native testing workflow?

Yes, you can migrate Jest unit tests to a Vite-native testing workflow because Vitest offers a Jest-compatible API, allowing you to transition your existing frontend test suites with minimal configuration changes.

Does this unit testing approach support modern frontend frameworks like React, Vue, and Svelte?

Yes, this unit testing approach supports modern frontend frameworks like React, Vue, and Svelte, providing the necessary integrations to test components within your JavaScript and TypeScript applications effectively.

What do I need to install to start running frontend unit tests with this method?

To start running frontend unit tests with this method, you need npm or yarn installed in your project environment to add the testing dependency and execute the test runner command.

How do I get instant feedback and code coverage reports during JavaScript testing?

You get instant feedback and code coverage reports during JavaScript testing by leveraging a Vite-powered runner that utilizes instant HMR for quick re-runs and includes built-in code coverage features.

Is there a UI mode available for running TypeScript unit tests?

Yes, there is a UI mode available for running TypeScript unit tests, which provides a visual interface to observe test execution, review results, and interact directly with your test suite.