javascript

Airbnb JavaScript Style Guide — “A mostly reasonable approach to JavaScript.” This repository is a well-known set of conventions for writing clean, consistent JavaScript, especially modern ES6+ code. It is maintained alongside an ESLint configuration package (`eslint-config-airbnb`) and a base variant (`eslint-config-airbnb-base`). The guide assumes usage of Babel and recommends accompanying packages such as `babel-preset-airbnb` and `airbnb-browser-shims` for polyfills. The guide is organized into short, numbered sections with rationale and code examples showing “bad” vs. “good” patterns. Covered topics include: - Types and references: prefer `const`, use `let` when reassignment is needed, avoid `var`. - Objects and arrays: literal syntax, shorthand, spreads, and safe property access. - Destructuring for objects and arrays. - Strings: single quotes, template literals for interpolation, avoid `eval()`. - Functions: named expressions, IIFE wrapping, never declaring functions inside blocks, using rest parameters instead of `arguments`. - Arrow functions, classes and constructors, modules, iterators and generators. - Properties, variables, hoisting, comparison operators and equality, blocks, control statements. - Comments, whitespace, commas, semicolons. - Type casting and coercion, naming conventions, accessors, events. - jQuery usage notes, ECMAScript 5 compatibility, ES6+ styles, standard library, testing, and performance. - Resources, community links, translations, contributors, and license. Each rule is accompanied by applicable ESLint rule names where relevant, making the guide useful both as documentation and as a baseline for automated linting. It also links to related style guides: ES5 (deprecated), React, CSS-in-JavaScript, CSS & Sass, and Ruby. The repository has been translated into a number of languages and is widely referenced in the JavaScript community.