Standard Library

ECMAScript 5 compatibility shims for legacy (and modern) JavaScript engines

ECMAScript 6 compatibility shims for legacy JS engines

📡 BroadcastChannel to send data between different browser-tabs or nodejs-processes 📡 + LeaderElection over the channels https://pubkey.github.io/broadcast-channel/

🍩 1kb minimally viable DOM Document implementation

A pure JS in-memory implementation of the IndexedDB API

ES5 shim for ES6 Reflect and Proxy objects

A polyfill for the sharing that can be used in the desktop, too, so your users can share in their Twitter, Facebook, Messenger, LinkedIn, SMS, e-mail, print, Telegram or WhatsApp.

node.js util module as a module

《RequreJS学习笔记》

fast, tiny `queueMicrotask` shim for modern engines

Never worry about polyfills again.

ES Proposal spec-compliant shim for Promise.allSettled

ES2017 spec-compliant shim for Object.values

⛔️ [DEPRECATED] That is a jquery plugin, which emulates HTML5 Form Validation on old browsers. The plugin also allows to customize form submission validation tooltips and field validation callbacks (e.g. via XMLHttpRequest)

ES2017 spec-compliant shim for Object.entries

Object.keys shim

Array.prototype.includes spec-compliant polyfill

An ESnext spec-compliant `RegExp.escape` shim/polyfill/replacement that works as far down as ES3.

Emulate console for all the browsers