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Node.js Event Loop Explained Clearly

2h ago · 7 min read · Introduction Whenever someone says Node.js is single-threaded, one doubt comes up almost immediately: then how does it handle so many requests at the same time? At first, this sounds a little confusin

NodeList vs HTMLCollection: Understanding the Real Difference in the DOM

10h ago · 6 min read · Introduction At some point while learning the DOM, almost everyone runs into this confusion: querySelectorAll() returns one thing, and getElementsByClassName() returns another. But both look like list

JavaScript Modules: Import and Export Explained

1d ago · 2 min read · Introduction As JavaScript projects grow, one problem appears quickly: keeping all the code in one file becomes messy This is where modules become useful. Why Modules Are Needed If everything is in o

Error Handling in JavaScript: Try, Catch, Finally

1d ago · 3 min read · Introduction JavaScript code does not always run perfectly. Sometimes: the wrong variable gets used an invalid value appears an unexpected situation occurs Errors can happen in all of these situa

Async/Await in JavaScript: Writing Cleaner Asynchronous Code

1d ago · 3 min read · Introduction Promises made asynchronous code better than callbacks. But as the steps increased, .then() chaining could still start to feel a little noisy. This is where async and await become useful.

Understanding JavaScript Promises - A Beginner's Real Experience

1d ago · 7 min read · When I first saw this code: console.log("Start"); setTimeout(() => console.log("Async Task"), 2000); console.log("End"); Output: Start End Async Task My first reaction was, "Okay, there is a 2000ms

Callbacks in JavaScript: Why They Exist

2d ago · 4 min read · Introduction In JavaScript, functions are not just blocks of code that run. We can: store functions pass functions around and call them later This is where the callback concept begins. In simple

Synchronous vs Asynchronous JavaScript

2d ago · 4 min read · Introduction At some point while learning JavaScript, this question naturally comes up: When does code run line by line, and when does some work happen later? This is where the topic of synchronous an

String Polyfills and Common Interview Methods in JavaScript

3d ago · 4 min read · Introduction Strings are very common in JavaScript. We work with them every day: checking text splitting text converting to lowercase or uppercase accessing characters But in interviews and deep

Map and Set in JavaScript

3d ago · 3 min read · Introduction In JavaScript, we often use arrays and objects. But in some situations, modern JavaScript gives us two more useful structures: Map Set Understanding them is useful because they handle