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Web Frontend2026-05-17

JavaScript

Also known as: JS / ECMAScript / ES2025

The programming language defined by the ECMAScript specification. Born as a browser scripting language, it now runs server-side and on edge runtimes via Node.js, Deno, and Bun — the universal language of the Web.


Overview

JavaScript features dynamic typing, prototype-based OOP, and async processing (Promise/async-await). Annual releases since ES2015 have added async/await, modules, class syntax, and other modern features. TypeScript has become the standard for large-scale JS projects.

Ecosystem

npm anchors the world's largest package ecosystem. On the frontend, Vite and Webpack serve as bundlers; on the backend, Node.js, Bun, and Deno are the primary runtimes.

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