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Checks if the given value is null or undefined
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.
- array
- TypedArray
- typed array
- is
- typed
- Int8Array
- Uint8Array
- Uint8ClampedArray
- Int16Array
- Uint16Array
- Int32Array
- Uint32Array
- Float32Array
- Float64Array
- View more
Validates if a value is undefined or null.
Returns true if a value is a plain object, array or function.
Returns true if an object was created by the `Object` constructor, or Object.create(null).
Check whether a value is a `Generator` or `GeneratorFunction`. The `co` way, more strict checking. Always return boolean true or false, never null or undefined.
- check
- es2015
- es6
- es7
- function
- functions
- generator
- generatorfunction
- generators
- is
- is-function
- is-generator
- is-generator-function
- next
Check if a value is a plain object
ES2015-compliant shim for Number.isNaN - the global isNaN returns false positives.
Used to check if some of the arguments are null or undefined.
Is this value a JS ArrayBuffer?
Is this value a JS SharedArrayBuffer?
maximally minimal type-testing library
Returns true if the value is an object and not an array or null.
Is this value a JS regex? Works cross-realm/iframe, and despite ES6 @@toStringTag
Is this value negative zero? === will lie to you
Returns `true` if the value is a primitive.
Check if a string is an IP address
Is this value an ES BigInt?
ES2015-compliant shim for Object.is - differentiates between -0 and +0
Determine if a value is an ES6 Symbol or not.