@suchipi/is

Functions for testing the types of JavaScript values, cross-realm. Has testers for all standard built-in objects/values.

Usage

``ts
import { is } from "@suchipi/is";

console.log(is.Object({})); // true
console.log(is.Array([])); // true
console.log(is.String(null)); // false

// etc
`

Available functions

- String
- string (alias of String)
- Number (does not return true for NaN)
- number (alias of Number)
- Boolean
- boolean (alias of Boolean)
- BigInt
- bigint (alias of BigInt)
- Symbol
- symbol (alias of Symbol)
- null
- undefined
- void
- Object (does not return true for null)
- object (alias of Object)
- Array
- Function
- function (alias of Function)
- tagged (Object toString tag checker)
- instanceOf (same as instanceof)
- Error (matches Error subclasses, too)
- Infinity
- NegativeInfinity
- NaN
- Date
- RegExp
- Map
- Set
- WeakMap
- WeakSet
- ArrayBuffer
- SharedArrayBuffer
- DataView
- TypedArray
- Int8Array
- Uint8Array
- Uint8ClampedArray
- Int16Array
- Uint16Array
- Int32Array
- Uint32Array
- Float32Array
- Float64Array
- Promise (matches any thenable)
- Generator (only guaranteed to match generators that weren't compiled with Babel or etc)
- GeneratorFunction (only guaranteed to match generator functions that weren't compiled with Babel or etc)
- AsyncFunction (only guaranteed to match async functions that weren't compiled with Babel or etc)
- AsyncGenerator (only guaranteed to match async generators that weren't compiled with Babel or etc)
- AsyncGeneratorFunction (only guaranteed to match async generator functions that weren't compiled with Babel or etc)

Notes

Two utility types, TypedArray and TypedArrayConstructor`, are also exported from this package.

License

MIT