Browser Developer Tools (DevTools) are powerful built-in tools that help developers inspect, test, and debug JavaScript code directly in the browser.
Instead of guessing what is wrong, DevTools allow you to pause code, check values, and understand exactly how your program is running.
Learning to use DevTools is a key skill for every professional web developer.
What You Can Do with DevTools
- View console errors and warnings
- Inspect variables and objects
- Pause code using breakpoints
- Step through code line by line
- Monitor network requests
- Debug faster and smarter
DevTools turn debugging into a clear and structured process.
The debugger keyword tells the browser to pause execution at that line.
You can then inspect variable values and step through the code.
By placing a breakpoint on the wrong line, you can see how values change.
This helps you quickly find logic mistakes.
These examples show how DevTools help you pause, inspect, and fix your code.
By mastering browser debugging tools, students gain a professional skill that saves time and builds confidence when working on real-world JavaScript projects.