Learn how to test your React applications

Welcome to How To Test Frontend. On this site you can find the best resources teaching you in an interactive way how to write tests for your frontend applications.

Most popular lessons:

Start with testing (Jest/Vitest) fundamentals, or go straight into the React lessons

Learn Jest or Vitest

New to testing in general, and/or new to Jest or Vitest?
Start with this free course showing you the basics

Learn Jest/Vitest (starter course)

⚛️ Learn React Testing

Learn how to test your React applications
Using React Testing Library

Learn React Testing

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New Course (Dec 20th 2025): Vitest Browser Mode

Just launched our Vitest Browser Mode course! Learn how to test your React components in a real browser environment with the latest testing techniques.

Vitest Browser Mode Course

🚀 Want more advanced React testing lessons?

Check out all lessons here

Test yourself with our React testing challenge

Or view my React testing blog