🗑️ Garbage Collection in JavaScript — Memory Management & Leak Prevention
Category: js / general-concepts
Difficulty: hard
Interview Importance: 🔴 Critical — Asked in 70% of senior frontend interviews. Essential for understanding memory management, performance optimization, and preventing memory leaks in production applications. 1️⃣ What is Garbage Collection? Garbage Collection (GC) is an automatic memory management mechanism that identifies and reclaims memory occupied by objects that are no longer needed by the program. It frees developers from manual memory allocation/deallocation, preventing common bugs like dangling pointers and memory leaks. The Core Concept [code example] Real-World Analogy: The Office Cleaning Service 🧹 Think of GC like an automated office cleaning service: [code example] Simple Example ```javascript // Memory is allocated when objects are created let user = { name: "Alice", age: 30 }; // Object created in memory...