Is this JS value callable? Works with Functions and GeneratorFunctions, despite ES6 @@toStringTag.

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

Port of jQuery.extend for node.js and the browser

The lodash method `_.isPlainObject` exported as a module.

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

Parses CSS inline style to JavaScript object (camelCased).

Efficient implementation of Levenshtein algorithm with locale-specific collator support.

A replacement for process.exit that ensures stdio are fully drained before exiting.

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

Is this specifier a node.js core module?

Manipulate the HTTP Vary header

Caseless object set/get/has, very useful when working with HTTP headers.

the path module from node core for browsers

Utility for normalizing a numeric range, with a wrapping function useful for polar coordinates

Lightweight Node.js version sniffing/comparison

## fetcher

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

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

Determine if the JS environment has BigInt support.

delegate methods and accessors to another property