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

Is this value negative zero? === will lie to you

Determine if a function is a native generator function.

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

detect possibly catastrophic, exponential-time regular expressions

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

Determine if a value is an ES6 Symbol or not.

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

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

Safe(r) monkeypatching for JavaScript.

Creates a duplex stream

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

A stricter URI encode adhering to RFC 3986

Is this value an ES BigInt?

Determine if an object is a Stream

PostCSS for CSS-in-JS and styles in JS objects

Color your terminal using CSS/hex color codes

Opens stuff, like webpages and files and executables, cross-platform

A pure JS implementation SHA256.

delegate methods and accessors to another property