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vitest

Run Jest-compatible unit and snapshot tests in Vite projects.

2|Updated Apr 6, 2026
Search Tags:#typescript#vitest#testing#javascript#jest#framework#vite
One-click install
npx skills add https://github.com/bingeli1379/eli-claude-marketplace --skill vitest-bingeli1379
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: vitest
Source: https://github.com/bingeli1379/eli-claude-marketplace/tree/main/plugins/eureka-sdd/skills/vitest
Command: npx skills add https://github.com/bingeli1379/eli-claude-marketplace --skill vitest-bingeli1379

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Vitest provides a fast, Jest-compatible testing framework for Vite projects, enabling rapid test execution during development.

Core Features & Use Cases

  • Jest-compatible API with native ESM and TypeScript support
  • Vite-native transformation and fast, watch-style test updates
  • Snapshot testing, mocking, and fixtures for reliable test suites
  • Use cases include unit tests, component tests, and CI-friendly workflows

Quick Start

Run your first test file with Vitest to execute tests quickly during development.

Frequently Asked Questions about vitest

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

FAQPage Schema
How do I run Jest-compatible tests in a Vite project?▼

Vitest provides a Jest-compatible API for Vite projects, allowing you to run unit and integration tests with minimal configuration. It leverages Vite's native transformation pipeline for fast execution and watch-style updates.

Does Vitest support native ESM and TypeScript for unit testing?▼

Yes, Vitest supports native ESM and TypeScript out of the box. It uses Vite-native transformation to execute tests, eliminating the need for complex transpiler configurations when testing JSX and TS files.

What is the best way to speed up test execution during development?▼

Vitest accelerates test execution through smart change detection, parallel test runs, and Vite-native transformations. This watch-style mode provides rapid test updates, making it ideal for fast development workflows.

Can I use snapshot testing and mocking in Vitest?▼

Yes, Vitest includes built-in snapshot testing and mocking capabilities. It also supports advanced features like fixtures and concurrent tests to ensure reliable component and unit test suites.

How does Vitest compare to Jest for JavaScript testing?▼

Vitest offers a Jest-compatible API but operates natively within the Vite ecosystem. Unlike Jest, it requires minimal configuration, supports native ESM directly, and uses Vite's transformation pipeline for faster execution.

Are there limitations when migrating from Jest to Vitest?▼

Vitest is designed to be Jest-compatible, but relies entirely on the Vite build pipeline. Projects not using Vite must integrate it first, and while the API is similar, specific Jest extensions or configurations may require manual adaptation.

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