Learn JavaScript - Advanced Concepts
Learn JavaScript - Advanced Concepts Building upon the basics, let's explore some advanced JavaScript concepts that will help you become a proficient developer. 1. Closures Closures allow functions to retain access to their lexical scope even when executed outside their original context. They are useful for data encapsulation and functional programming. function outerFunction(outerVariable) { return function innerFunction(innerVariable) { console.log(`Outer: ${outerVariable}, Inner: ${innerVariable}`); }; } const newFunction = outerFunction("Hello"); newFunction("World"); 2. Prototypes and Inheritance JavaScript uses prototype-based inheritance to enable object properties and methods sharing. Every JavaScript object has a prototype, which is another object it inherits from. function Person(name, age) { this.name = name; this.age = age; } Person.prototype.greet = function() { console.log(`He...