JavaScript Internals (521 Qs)•Part 2: Promises, Callbacks, Async & Strict Mode (54 - 103)
What are the tools or techniques used for debugging JavaScript code
You can use below tools or techniques for debugging javascript
- Chrome Devtools
- debugger statement
- Good old console.log statement
Practical Code Example
javascript
// Modern JavaScript Debugging Tools:
// 1. Conditional Breakpoint with debugger statement:
function calculateTax(amount) {
if (amount > 10000) {
debugger; // Pauses DevTools only when amount > 10000
}
return amount * 0.15;
}
// 2. Advanced Console formatting:
console.table([{ name: 'Dev', role: 'Frontend' }, { name: 'Bob', role: 'Backend' }]);
console.time('fetchTimer');
// ... async work ...
console.timeEnd('fetchTimer');