vitest

Name: vitest
Availability: InStock
Author: theslashdojo

Automate unit testing for JavaScript and TypeScript projects with Vitest.

Updated Apr 10, 2026

Search Tags:#typescript #vitest #testing #vite #mocking #unit-testing #esm

Ready to run

npx skills add https://github.com/theslashdojo/dojo --skill vitest-theslashdojo

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: vitest
Source: https://github.com/theslashdojo/dojo/tree/main/nodes/testing/vitest
Command: npx skills add https://github.com/theslashdojo/dojo --skill vitest-theslashdojo

SYSTEM DOCUMENTATION & REQUIREMENTS

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

What problem does it solve?

Vitest provides a fast, Vite-native environment for writing and running unit tests in JavaScript and TypeScript, delivering quick feedback and modern tooling without heavy configuration.

Core Features & Use Cases

Jest-compatible API for describe, it, expect, and familiar testing patterns.
Vite-native test execution with native ESM, TypeScript, and JSX support.
Watch mode, UI dashboard, and browser mode for flexible development and testing workflows.
Monorepo/workspace support and type-checking integration for large projects.

Quick Start

Install Vitest as a dev dependency and run tests using the vitest CLI.

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 app using TypeScript?▼

Vitest automates unit testing for Vite-based apps by providing a Jest-compatible API alongside native ESM, TypeScript, and JSX support. It leverages Vite-native execution to deliver fast feedback and browser-like environments.

Does Vitest work in a monorepo workspace setup?▼

Vitest fully supports monorepo and workspace workflows, allowing large projects to run unit tests across multiple packages. It includes type-checking integration and can be configured using vitest.config.ts or vite.config.ts.

What is the best way to get fast feedback during JavaScript unit testing?▼

Using Vitest's watch mode and UI dashboard is the best way to get fast feedback during JavaScript unit testing. These features enable flexible development workflows with quick test execution in a Vite-native environment.

Can I use a Jest-compatible API for mocking and unit testing with Vite?▼

You can use Vitest's Jest-compatible API for mocking and unit testing with Vite. It supports familiar testing patterns like describe, it, and expect, running natively within the Vite ecosystem for JavaScript and TypeScript projects.

Does unit testing require heavy configuration for native ESM and JSX transforms?▼

Unit testing with Vitest requires minimal configuration for native ESM and JSX transforms. It delivers modern tooling and Vite-native execution directly through settings in vitest.config.ts or vite.config.ts.

When should I use browser mode for TypeScript unit testing?▼

You should use Vitest's browser mode when your TypeScript unit tests require a browser-like environment for Vite-based apps. It provides this feature alongside watch mode and a UI dashboard for flexible testing workflows.