A community host for shims and polyfills that are compliant to EcmaScript specs.https://tc39.es/ecma262/
Spec-compliant polyfill for String.prototype.replaceAll ESnext proposal.
Spec-compliant shim for `Object.getOwnPropertyDescriptors` that works in ES5.
An ESnext spec-compliant `Array.prototype.flatMap` shim/polyfill/replacement that works as far down as ES3.
ES6-compliant shim for Object.is - differentiates between -0 and +0, and can compare to NaN.
Official ES spec-compliant polyfill for Object.hasOwn