Debugging is all about tracking down and resolving issues in your code.
It's a vital skill for building stable, high-performing JavaScript applications.
đ Common Errors:-
Syntax Errors: These happen when the structure of your code is incorrectâlike forgetting a bracket or misplacing a semicolon.
Logical Errors: These occur when the code runs without crashing but doesnât behave as expected due to flaws in the logic.
đ Using console.log():-
A simple yet powerful way to debug-use console.log( ) to print variable values and track your codeâs flow in the console.
đ Setting Breakpoints:-
Pause code at specific lines using your browserâs dev tools.
Great for tracking down bugs efficiently.
đ âdebuggerâ Keyword:-
Place debugger in your code where you want to pause execution. It helps you inspect variables and the program state in real time.
Perfect for tracking down tricky bugs.
đ Async Code Debugging:-
Requires a good grasp of Promises and the event loop.
Use .catch( ) to properly handle errors in Promises, and leverage async/await with try-catch blocks for cleaner, more readable debugging.
đ Browser DevS Tools:-
Your browserâs developer tools are powerful allies when it comes to debugging.
Using Network tab to track API calls, view real-time responses, and pinpoint issues in communication between your frontend and backend.
đ Debugging Best Practices:-
Use clear, descriptive variable names
Keep functions short and purposeful
Add unit tests to catch issues early