Determine if the JS environment has `Symbol.toStringTag` support. Supports spec, or shams.

An ES2015 mostly-spec-compliant `Reflect.getPrototypeOf` sham/polyfill/replacement that works in as many engines as possible

An ESnext spec-compliant `Array.prototype.findLast` shim/polyfill/replacement that works as far down as ES3.

Is this value a JS FinalizationRegistry? This module works cross-realm/iframe, and despite ES6 @@toStringTag.

Define multiple non-enumerable properties at once. Uses `Object.defineProperty` when available; falls back to standard assignment in older engines.

Returns an array of Typed Array names that are available in the current environment

Robust call-bound JavaScript intrinsics, using `call-bind` and `get-intrinsic`.

Type safe dependency injection framework for TypeScript

An ES2019 spec-compliant `Array.prototype.flat` shim/polyfill/replacement that works as far down as ES3.

<!--BEGIN STABILITY BANNER-->

Does this JS environment support the `name` property on functions?

The pure js optional dependency for sass-embedded

ES6 spec-compliant RegExp.prototype.flags shim.

The pure js optional dependency for sass-embedded

Determine if a function is a native generator function.

Unique tag for use in the type-fest Tagged type

Which kind of Collection (Map, Set, WeakMap, WeakSet) is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.

Type utilities for working with TypeScript + ESLint together

ES6 spec-compliant Object.assign shim. From https://github.com/es-shims/es6-shim

Which kind of Typed Array is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.