Browser Dev Tools

Firefox

Firefox DevTools User Docs — Firefox Source Docs documentationdeveloper.mozilla.org

Chrome

Chrome DevTools  |  Chrome for DevelopersChrome for Developers

Javascript HTML maps

Whenever you encounter minified JS, check if source maps are available by using the "Sources" section to browse the JS. Note the orange folders in the left nav directory structure. These are the non-minified versions of JS.

Learn web development  |  web.devweb.dev