@Sudhanshu17

Async Code in Node.js: Callbacks and Promises

4d ago · 7 min read · 1) Why Async Code Exists in Node.js (with File Reading Scenario) Imagine your program needs to read a file. This takes time. If Node.js waits for the file to fully load before doing anything else, the

String Polyfills and Common Interview Methods in JavaScript

6d ago · 10 min read · 1) What are String Methods? String methods are built-in functions provided by programming languages (like JavaScript) that help you work with and manipulate text (strings) easily. A string is basicall

The new Keyword in JavaScript

Apr 22 · 6 min read · 1) What the new Keyword Does In JavaScript, the new keyword is used to create an object from a constructor function. It helps set up the object automatically and links it to the constructor. When new

Callbacks in JavaScript: Why They Exist

Apr 22 · 7 min read · A callback function in JavaScript is one of those ideas that looks simple at first but becomes much more meaningful once you understand why it exists and how it’s used in real situations. Callbacks ex

Template Literals in JavaScript

Apr 22 · 7 min read · 1) Problems with Traditional String Concatenation Traditional string concatenation (using +) works, but it becomes problematic as your code grows. It often leads to messy, hard-to-read, and error-pron