How do I debug JavaScript in Firefox?

Debug JavaScript in Firefox in 7 easy steps

  1. Sample project introduction.
  2. Analyze a Raygun error report.
  3. Explore the anatomy of Dev Tools.
  4. Add breakpoints to your code.
  5. Step through your code.
  6. Determine the state of your application.
  7. Fix the bug!

How do I debug Firefox addons?

Debugging content scripts

  1. in the Firefox menu (or Tools menu if you display the menu bar or are on macOS), click Web Developer then Debugger.
  2. press Ctrl + Shift + i ( Command + Option + i on macOS) and click Debugger.

How can I debug JavaScript?

Debug JavaScript

  1. Step 1: Reproduce the bug.
  2. Step 2: Get familiar with the Sources panel UI.
  3. Step 3: Pause the code with a breakpoint.
  4. Step 4: Step through the code.
  5. Step 5: Set a line-of-code breakpoint.
  6. Step 6: Check variable values. Method 1: The Scope pane. Method 2: Watch Expressions.
  7. Step 7: Apply a fix.
  8. Next steps.

How do I run JavaScript code in Firefox?

Select Settings menu (3 horizontal lines ≡ icon in the upper right corner) -> Web Developer -> Scratchpad. Click the Run button on the Scratchpad toolbar to run your JavaScript code.

How do I view JavaScript files in Firefox?

Hit option + command + S on Mac or shift + ctrl + S on Windows to open the Debugger. The source list pane shows all the JavaScript files related to the current page or project. The source pane shows the content of those files.

How do I inspect element in Firefox?

Open the Inspector

  1. Choose Tools > Web Developer > Inspector from the Menu Bar or the equivalent keyboard shortcut.
  2. Right-click an element on a web page and select Inspect Element.

How do I debug my browser?

If you want to debug it, you should press F12 on Chrome to open the developer mode. You can see that the JS code of the current page is under the Source menu, you can set a breakpoint directly at the beginning of the script. Then you can click on the UI button or menu to start debugging(both js and backend activity ).

Is JavaScript enabled in Firefox?

In Firefox, JavaScript is enabled by default.

Which tool is built in Firefox for experimenting with JavaScript?

Scratchpad provided an environment for experimenting with JavaScript code. You can write, run, and examine the result of code that interacts with the web page.

How do I use the JavaScript debugger?

The JavaScript Debugger enables you to step through JavaScript code and examine or modify its state to help track down bugs. You can use it to debug code running locally in Firefox or running remotely, for example on an Android device running Firefox for Android. See remote debugging to learn how to connect the debugger to a remote target.

How do I debug Firefox code in IntelliJ?

Debugging JavaScript in Mozilla Firefox. IntelliJ IDEA 9M1 supports debugging of JavaScript code in Mozilla Firefox. Just create a JavaScript Debug configuration, select Firefox from the Browser list and click OK: IntelliJ IDEA automatically installs plugin for Mozilla Firefox and executes the configuration.

How to enable JavaScript debugging in IntelliJ IDEA 9m1?

IntelliJ IDEA 9M1 supports debugging of JavaScript code in Mozilla Firefox. Just create a JavaScript Debug configuration, select Firefox from the Browser list and click OK:IntelliJ IDEA automatically Product Blogs IDEs AppCode CLion DataGrip Fleet GoLand IntelliJ IDEA MPS PhpStorm PyCharm Rider RubyMine WebStorm Toolbox App Plugins Big Data Tools

How do I display the debug message in console?

The message is only displayed to the user if the console is configured to display debug output. In most cases, the log level is configured within the console UI. This log level might correspond to the `Debug` or `Verbose` log level. A list of JavaScript objects to output.