Step out of current function: Completes the execution of the current function and moves to the next line after the function call. Step into next function call: Executes the current line of code and steps into any function that is being called.Step over next function call: Executes the current line of code and moves to the next line without stepping into functions.Resume script execution: Continues the execution of the script until the next breakpoint is hit or the script completes. Stepping Through CodeĪfter pausing the execution at a breakpoint, you can use the following debugging controls to step through your code: You can then use the debugging controls at the top of the Sources panel to step through your code and observe the state of your variables and the call stack. The script will pause at the breakpoint, and the current line will be highlighted. Once the breakpoint is set, refresh the page or trigger the execution of the script. This function logs a message to the console, which can be helpful for tracing the execution of your code or inspecting the value of variables.įunction add ( a, b ) const result = add ( 3, 4 ) console. One of the simplest ways to debug JavaScript code is by using the console.log() function. Let's look at some common debugging techniques using the Console. You can use it to log messages, inspect variables, and execute JavaScript commands. The Console tab in Chrome DevTools is a powerful tool for debugging JavaScript code. For JavaScript debugging, the most relevant tabs are "Elements", "Console", and "Sources". This will open the DevTools panel, which is divided into several tabs. Alternatively, you can use the keyboard shortcut Ctrl + Shift + I (or Cmd + Opt + I on macOS). To open Chrome DevTools, simply right-click on a web page, and select "Inspect" from the context menu. In this guide, we'll focus on using the Chrome Developer Tools (also known as DevTools) in Google Chrome, but similar tools exist in other browsers, such as Firefox Developer Tools and Microsoft Edge DevTools. These tools allow you to inspect and interact with the JavaScript code running on a web page. Most modern browsers come with built-in developer tools, which provide a comprehensive set of debugging utilities. As a developer, you must be prepared to diagnose and fix these issues as they arise. Common issues in JavaScript code include syntax errors, logical errors, and runtime errors. Debugging involves identifying the cause of an issue and correcting it in your code. Let's dive in! Understanding the Basics of Debuggingīefore we explore the debugging tools available in browsers, let's first understand the basic concepts of debugging. By the end of this post, you'll be well-equipped to tackle issues in your JavaScript code with confidence. In this guide, we will walk you through various techniques and tools available for debugging JavaScript directly in your browser. Debugging is the process of finding and fixing bugs in your code. Welcome to this beginner-friendly guide on debugging JavaScript in browsers! As a developer, you'll likely encounter issues in your code at some point, and it's important to know how to effectively debug these problems.
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