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Does the environment have full property descriptor support? Handles IE 8's broken defineProperty/gOPD.
Get and robustly cache all JS language-level intrinsics at first require time
Implementation of Function.prototype.bind
Determine if the current node version supports the `--preserve-symlinks` flag.
Is this specifier a node.js core module?
An ES2015 mostly-spec-compliant `Reflect.getPrototypeOf` sham/polyfill/replacement that works in as many engines as possible
Determine if the JS environment has Symbol support. Supports spec, or shams.
Is this value a JS FinalizationRegistry? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Returns an array of Typed Array names that are available in the current environment
Gets the description of a Symbol. Handles `Symbol()` vs `Symbol('')` properly when possible.
Determine if a function is a native generator function.
Determine if the JS environment has `Symbol.toStringTag` support. Supports spec, or shams.
Is this value a JS regex? Works cross-realm/iframe, and despite ES6 @@toStringTag
ES spec-like internal slots
Is this value a JS Number object? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Which kind of Collection (Map, Set, WeakMap, WeakSet) is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.
Which kind of Typed Array is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.
Helper package to shim a method into `Array.prototype[Symbol.unscopables]`
ECMAScript “ToPrimitive” algorithm. Provides ES5 and ES2015 versions.
Determine if a function is a native async function.
Unbox a boxed JS primitive value.
Is this value a JS Boolean? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Is this value a JS Date object? This module works cross-realm/iframe, and despite ES6 @@toStringTag.