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.