ES2015 (ES6) Enhancements Class Syntax ES2015 introduced syntactic sugar over JavaScript's prototype-based inheritance, enabling cleener object-oriented patterns. class Vehicle { constructor(model, year) { this.model = model; this.year = year; } displayInfo() { console.log(`${this.year} ${this.model...
Set Fundamentals Sets store unique values of any primitive type or object reference. The constructor automatically filters duplicates using the SameValueZero comparison algorithm, which treats NaN values as identical and distinguishes between positive and negative zero. const activeSessions = new Se...
Core Concepts of ES6 Promises A Promise represents the eventual completion (or failure) of an asynchronous operation and its resulting value. It addressse callback hell by providing a structured way to handle async flows. Basic Promise Execution Flow Consider an asynchronous task using setTimeout: /...
Introduction In JavaScript, the const keyword, introduced in ES6, is used to declare constants. A constant's immutability refers to the inability to reassign the variable's memory address. For primitive data types (like numbers, strings, booleans), this means the value itself cannot change. However,...