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Spread vs Rest Operators in JavaScript

15h ago · 8 min read · Table of Contents Same Syntax, Two Opposite Jobs The Spread Operator — Expanding Values The Rest Operator — Collecting Values Spread vs Rest — The Clear Difference Practical Real-world Use Cases

The new Keyword in JavaScript

15h ago · 7 min read · The Problem new Solves Suppose you need to create multiple user objects: const user1 = { name: "Aarav", age: 25, role: "admin" }; const user2 = { name: "Priya", age: 22, role: "member" }; const user

Understanding the this Keyword in JavaScript

Apr 4 · 8 min read · this is one of those things that confuses everyone at first — and then clicks all at once. Let's make it click. The One Rule That Explains Everything Before any examples, here's the mental model tha

String Polyfills and Common Interview Methods in JavaScript

Mar 30 · 12 min read · The best way to truly understand a tool is to build it yourself. Let's implement JavaScript's most common string methods from scratch — and ace those interview questions along the way. Series: JavaSc

Callbacks in JavaScript: Why They Exist

Mar 27 · 8 min read · Before Promises, before async/await — there were callbacks. Understanding them isn't just history; it's the foundation of everything async in JavaScript. Table of Contents Functions Are Values in J