JavaScript

Detailed Explanation

JavaScript is the programming language of the web. It runs in every browser and makes websites interactive -- handling button clicks, form submissions, animations, and real time updates. JavaScript has grown far beyond the browser: with Node.js it runs servers, with React it builds complex user interfaces, and with React Native it creates mobile apps.

Core data types include strings, arrays, objects, booleans, and variables. Key language features include functions, Async/Await, Promises, callbacks, Try/Catch, conditionals, Scope, imports, and exports. JavaScript powers the DOM, Rendering, and is the foundation of TypeScript, JSX, JSON, npm, and every major Frontend Framework. Claude Code makes learning JavaScript faster by explaining code as it writes it.