Chrome DevTools Secrets You Didn't Know

The Network Tab: Throttling and Blocking

Everyone knows how to check API responses in the Network tab. But did you know you can simulate a terrible 3G connection to see how your loading spinners behave? Even better, you can right-click any API request and select "Block request URL". This is the fastest way to test your frontend error handling without having to shut down your backend server.

Conditional Breakpoints

Putting a debugger; statement inside a loop that runs 1,000 times is torture. Instead, right-click the line number in the DevTools "Sources" tab and select "Add conditional breakpoint". Type an expression (e.g., user.id === 500). The execution will only pause when that specific condition is met, saving you hundreds of clicks.

Copy as Fetch

Trying to recreate a complex API request (with all its required cookies, auth tokens, and specific headers) in Postman or your terminal is tedious. Go to the Network tab, right-click the successful request, and select "Copy -> Copy as fetch". You now have the exact JavaScript code needed to replicate that request perfectly.