javascript
javascript related cheatsheet collection - 9 quick reference guides. Find fast, copy directly. The essential online command reference for developers and SRE.
JavaScript Cheatsheet - ES6+ Command Reference
An ES6+ syntax reference for frontend and full-stack developers: let/const, arrow functions, destructuring, template literals, higher-order array methods, and Promise/async-await — the patterns used most in everyday React/Vue and Node code, ready to reuse.
ES6+ Cheatsheet - ES6+ JavaScript Syntax Reference
A focused ES2015+ reference for JavaScript developers modernizing their code: let/const and block scoping, arrow functions, destructuring, template literals, Promise/async, modules, classes, Map/Set and iterators — the language features that changed how everyday JS is written.
jQuery Cheatsheet - jQuery API & DOM Manipulation Reference
For developers maintaining legacy sites or jQuery-heavy frontends: covers selectors, DOM manipulation, event binding and delegation, Ajax requests, animations, and the plugin pattern — the API you reach for when modernizing or maintaining jQuery code.
Lodash Cheatsheet - Utility Functions
A Lodash quick reference for writing safer, shorter JS without hand-rolling helpers: array transforms, safe nested property access, deep clone & merge, debounce/throttle, and handy math utilities. Copy and run.
Vue.js Cheatsheet - API Reference
A Vue 3 reference for building reactive UIs with the Composition API: ref/reactive/computed/watch, lifecycle hooks, props-emits-provide-inject communication, router, Pinia state, and template/render optimization. Copy and run.
React Cheatsheet - Hooks & Components
A React 18 reference for building component UIs with Hooks: state and effects, advanced Hooks like useReducer/Context, component patterns, controlled forms, and performance tweaks (memo, lazy, Suspense). Copy and run.
Promise Cheatsheet - Async JavaScript
A Promise async reference for JavaScript: creating and consuming promises, static combinators like all/race/allSettled, chaining, the async/await syntax, plus concurrency control, timeouts, retries, and abort via AbortController. Copy and run.
Chai Cheatsheet - Assertion Library
A Chai.js assertion reference covering all three styles — expect and should (BDD) and assert (TDD): equality, deep comparison, types, inclusion, thrown errors, numeric bounds, plus async and HTTP helpers via plugins. Copy and run.
Jest Cheatsheet - Testing Framework
Jest testing APIs covering test cases and grouping (describe/it), matchers and assertions, async testing, mock functions and module mocking, snapshot tests, and coverage reports. For writing JavaScript unit tests that fail for the right reason.