Is this value a JS Number object? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
escape Markdown control characters
Is this value negative zero? === will lie to you
The node.js assert module, re-packaged for web browsers.
Unbox a boxed JS primitive value.
Is this value a JS Date object? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Test if a value is a number having an integer value.
Is this value a JS WeakRef? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Test if a value is a number having a nonnegative integer value.
Determine if a value is an ES6 Symbol or not.
Is this value a JS Map? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Is this value an ES BigInt?
List of node.js builtin modules
Test if a value is a Uint8ClampedArray.
Test if a value is an array-like object.
minimalistic-assert ===
Test if a value is a number having a positive integer value.
The assert module from Node.js, for the browser.
Test if a value is an Int32Array.
Test if a value is an Int8Array.
Test if a value is a collection.
Power Assert in JavaScript
diagram renderer for power-assert context
Test if an object's own property is enumerable.