vitest

Run Vite-native unit tests with TypeScript, mocking, and coverage.

Updated Mar 30, 2026
One-click install
npx skills add https://github.com/Jkker/react-template --skill vitest-jkker
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: vitest
Source: https://github.com/Jkker/react-template/tree/main/.agents/skills/vitest
Command: npx skills add https://github.com/Jkker/react-template --skill vitest-jkker

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Vitest provides a fast, modern, and integrated unit testing solution for frontend projects using Vite, reducing feedback loops and simplifying test authoring and maintenance.

Core Features & Use Cases

  • Fast, Vite-native unit tests with native ESM, TypeScript, and JSX support
  • Jest-compatible API, powerful mocking, snapshots, and coverage
  • Use cases include test writing, mocking, coverage configuration, filtering, and fixtures

Quick Start

Create a simple test in a .test.ts file and run vp test to see results immediately.

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-based frontend project?

Vitest provides Vite-native unit testing by creating a .test.ts file and running the test command to get fast results with native ESM and TypeScript support.

Does this unit testing solution support React, Vue, and Svelte workflows?

Yes, this unit testing solution applies to React, Vue, Svelte, and other frameworks within Vite-based workflows, providing integrated and reliable test execution.

Can I use mocking and snapshots when testing TypeScript applications?

Yes, you can use mocking and snapshots when testing TypeScript applications, utilizing a Jest-compatible API that provides powerful mocking and snapshot tooling.

What is the best way to configure coverage and fixtures for frontend unit tests?

The best way to configure coverage and fixtures is using this Vite-native tool, which supports coverage configuration, filtering, and fixtures alongside concurrent test execution.

How does native ESM support improve frontend testing workflows?

Native ESM support improves frontend testing by eliminating module transformation overhead, allowing modern Vite apps to run unit tests natively without complex configuration.