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4753 packages found
Is this value a JS ArrayBuffer?
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.
Is this value a JS WeakSet? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Is this value a JS WeakMap? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Is this value negative zero? === will lie to you
Is this value a JS SharedArrayBuffer?
Returns true if a value has the characteristics of a valid JavaScript accessor descriptor.
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
Returns true if a value has the characteristics of a valid JavaScript data descriptor.
Returns true if a value has the characteristics of a valid JavaScript descriptor. Works for data descriptors and accessor descriptors.
Type check values
ES2015-compliant shim for Object.is - differentiates between -0 and +0
Determine if a value is an ES6 Symbol or not.
Returns true if a number or string value is a finite number. Useful for regex matches, parsing, user input, etc.
Get the native type of a value.
Returns true if the value is an object and not an array or null.
Returns true if an object was created by the `Object` constructor, or Object.create(null).
Is this value a JS regex? Works cross-realm/iframe, and despite ES6 @@toStringTag