1509 packages found
Is this value a JS regex? Works cross-realm/iframe, and despite ES6 @@toStringTag
Is this an arguments object? It's a harder question than you think.
Get the native type of a value.
Determine if a value is an ES6 Symbol or not.
ES2015-compliant shim for Object.is - differentiates between -0 and +0
Is this value a JS Typed Array? This module works cross-realm/iframe, does not depend on `instanceof` or mutable properties, and despite ES6 Symbol.toStringTag.
- typed array
- View more
Is this value negative zero? === will lie to you
Check if something is a Node.js stream
Returns true if an object was created by the `Object` constructor, or Object.create(null).
ES2015-compliant shim for Number.isNaN - the global isNaN returns false positives.
Detect the file type of a Buffer/Uint8Array/ArrayBuffer
Check if a value is a plain object
i18n for ISO 3166-1 country codes
Detect whether or not an object is a Typed Array
Check if the character represented by a given Unicode code point is fullwidth
Check if a URL is absolute
Returns `true` if the string is upper case only.
Returns `true` if the string is lower case only