Using Firebug to Debug JavaScript

Description

Firebug is a very powerful tool that can help you discover and resolve errors in your code.

Here, we use Firebug to handle JavaScript code.

First, we need to load the page and open Firebug.

Sometimes you need to reload the page.

Error Count in the Status Bar

Display Errors on the Current Page

Show Detailed Error Information

Step-by-Step Code Debugging

You can execute the code step by step. This is very useful for code debugging.

Using Breakpoints for Debugging

Breakpoint debugging can halt the execution of the code, allowing you to check if the error is within a specified code range. This is useful for error debugging.

If you click the "Step over" button, Firebug will update all variables until you terminate the breakpoint execution in the right window.

Using Expressions to Activate Breakpoints

You can write an expression that will stop the code execution when the condition is true.

Search

You can use quick search to find keywords in your code.