Vitest

Run Vitest unit tests for JavaScript projects with ESM and TypeScript support.

Updated Jan 26, 2026
One-click install
npx skills add https://github.com/ceslep/inasistig --skill vitest-ceslep
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: Vitest
Source: https://github.com/ceslep/inasistig/tree/main/.agents/skills/vitest
Command: npx skills add https://github.com/ceslep/inasistig --skill vitest-ceslep

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires jest, vitest, and includes scripts (resource) and references (resource) and assets (resource) components.

What problem does it solve?

This Skill provides a fast and efficient unit testing framework for JavaScript applications, addressing the need for reliable and maintainable test cases, especially for modern JavaScript projects using ESM.

Core Features & Use Cases

  • Fast Testing: Utilizes Vite's transformation pipeline for near-instant feedback on changes.
  • Jest Compatibility: Offers a Jest-compatible API for seamless migration.
  • ESM Support: Natively supports ES modules, TypeScript, and JSX without configuration.
  • Parallel Execution: Utilizes multi-threaded workers for parallel test execution to reduce overall testing time.
  • Use Case: Ideal for developers looking to add robust testing to their JavaScript projects, particularly those using modern JavaScript features and frameworks.

Quick Start

Use the vitest skill to run tests for your JavaScript project. Simply execute the command 'vitest' in your project's root directory.

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 JavaScript project using ES modules?

You can run unit tests for a JavaScript project using ES modules by executing the 'vitest' command in your project's root directory. This framework natively supports ESM, TypeScript, and JSX without requiring additional configuration.

Can I migrate my Jest tests to a faster JavaScript testing framework?

Yes, you can migrate your Jest tests because this framework provides a Jest-compatible API. This allows you to transition your existing JavaScript test cases to a faster testing pipeline without rewriting your test suite.

Does native ESM support require configuration for TypeScript and JSX testing?

Native ESM support for TypeScript and JSX testing requires no configuration. The framework leverages Vite's transformation pipeline to handle modern JavaScript features directly, providing near-instant feedback during test execution.

How does parallel execution improve JavaScript unit testing speed?

Parallel execution improves JavaScript unit testing speed by utilizing multi-threaded workers. This approach runs multiple test cases concurrently, which significantly reduces overall testing time compared to sequential execution.

Do I need Node.js and Jest compatible libraries for Vite unit testing?

Yes, you need a JavaScript environment with Node.js and Jest compatible libraries to use this Vite unit testing framework. These dependencies provide the foundational environment required to execute and validate your test cases.