Wallaby is a continuous testing tool for JavaScript, designed to seamlessly integrate into your development environment. It automatically runs your tests as you code, providing real-time feedback on test results, code coverage, and errors, helping you quickly catch issues and stay focused on coding.

Wallaby provides the following features:

• realtime feedback for errors and any expressions in your code,
• realtime code coverage updated as you type,
• time travel debugger with edit-and-continue and interactive timeline,
• value explorer for viewing runtime values,
• running and focussing on selected tests,
• quick navigation to failing tests/error sources,
• close to instant incremental test execution,
• code coverage explorer and test explorer,
• compact & side-by-side diff views, and much more.

Wallaby Time Travel Debugger In Action

<img src="https://wallabyjs.com/assets/img/ttd-vsc-main.gif" width="800" />

Wallaby.js quick links

• Wallaby.js docs
• Wallaby.js website
• Download wallaby.js