A window.fetch JavaScript polyfill.
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Standard Library
History.js gracefully supports the HTML5 History/State APIs (pushState, replaceState, onPopState) in all browsers. Including continued support for data, titles, replaceState. Supports jQuery, MooTools and Prototype. For HTML5 browsers this means that you can modify the URL directly, without needing to use hashes anymore. For HTML4 browsers it will revert back to using the old onhashchange functionality.
🐕 Bare minimum 500b fetch polyfill.
Promise packages, patterns, chat, and tutorials
A Javascript library for working with native objects.
Shim to insulate apps from spec changes and prefix differences. Latest adapter.js release:
jQuery contextMenu plugin & polyfill
A polyfill for the Resize Observer API
Client-side support for CSS custom properties (aka "CSS variables") in legacy and modern browsers
A cross-browser wrapper for the Web Audio API which aims to closely follow the standard.
Polyfill for the AbortController DOM API and abortable fetch (stub that calls catch, doesn't actually abort request).
Tiny library (<200B gzip) for deferring something by a "tick"
JavaScript library for rendering IMSC Text and Image Profile documents to HTML5
ES2017 spec-compliant shim for Object.values
ES2017 spec-compliant shim for Object.entries
Object.keys shim
Array.prototype.includes spec-compliant polyfill
Implements the `{{on eventName this.someAction}}` element modifier from https://github.com/emberjs/rfcs/blob/master/text/0471-on-modifier.md
An ESnext spec-compliant `Array.prototype.flatMap` shim/polyfill/replacement that works as far down as ES3.
ES5 spec-compliant shim for String.prototype.trim
A full-featured polyfill for customized built-in elements
ES2019 spec-compliant shim for String.prototype.trimRight.
Array.prototype.every spec-compliant polyfill