JavaScript - Debugging

Overview

Estimated time: 10–15 minutes

Debugging is the process of finding and fixing errors in your code. Modern browsers provide powerful tools for debugging JavaScript.

Learning Objectives

• Use browser developer tools to debug JavaScript.
• Set breakpoints, inspect variables, and step through code.

Prerequisites

• JavaScript - Error Handling

Using the Console

console.log('Debug info');
console.error('Something went wrong');

Breakpoints & Stepping

// In browser dev tools, click the line number to set a breakpoint
// Use step over, step into, and step out to control execution

Common Pitfalls

• Forgetting to remove breakpoints or debug code before deploying.

Summary

Effective debugging is a key skill for every JavaScript developer. Use browser tools to quickly find and fix issues.