ES2015 `Object.assign()` ponyfill
Loosely test a package's compliance with the es-shim API
Module-friendly fork of object-assign, an ES2015 `Object.assign()` ponyfill
ES2015 Object.assign() ponyfill
Prolyfill for CSS Container Queries (aka Element Queries)
ES6 keyed collections ponyfills
A robust & optimized `String.prototype.at` prollyfill, based on the proposal for ECMAScript 6/7.
A polyfill for DOM query, queryAll, and Elements
Return a string with escaped regular expression characters.
Exposes an experimental browser API for diffHTML