Detect whether or not an object is a Typed Array

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

Check if the process is running inside Windows Subsystem for Linux (Bash on Windows)

Determine if a function is a native generator function.

Is this an arguments object? It's a harder question than you think.

Check if something is a generator function

Is this value a JS regex? Works cross-realm/iframe, and despite ES6 @@toStringTag

Returns true if a value is a plain object, array or function.

Check if a path is inside another path

Determine if a function is a native async function.

Detect if a buffer is utf8 encoded.

Check if a file path is a binary file

Detect if the current environment is a CI server

check if a source string is an es6 module

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

Check if a URL is absolute

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

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

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

Checks whether a value is an object