get-internal-type

Determine the JavaScript [[Class]] of an object, where:

| Object Value | [[Class]] | Version | |:------------- |:----- |:------ | | undefined | undefined | 1.0.0 | | null | null | 1.0.0 | | false | boolean | 1.0.0 | | Symbol("123") | symbol | 1.0.0 | | 123 | number | 1.0.0 | | BigInt(9007199254740991) | bigint | 1.0.0 | | "hello" | string | 1.0.0 | | /s+/gi | regexp | 1.0.0 | | new Date() | date | 1.0.0 | | new Error("A mistake") | error | 1.0.0 | | {} | object | 1.0.0 | | new (class SomeCustomClass {}) | object | 1.0.0 | | () => {} | function | 1.0.0 | | function(){} | function | 1.0.0 | | class Simple {} | function | 1.0.0 | | [1,2,3] | array | 1.0.0 | | new Set() | set | 1.2.0 | | new WeakSet() | set | 1.3.1 | | new Map() | map | 1.2.0 | | new WeakMap() | map | 1.3.1 | | new Int8Array(8) | typedarray | 1.3.0 | | new Uint8Array() | typedarray | 1.3.0 | | new Uint8ClampedArray() | typedarray | 1.3.0 | | new Int16Array() | typedarray | 1.3.0 | | new Uint16Array() | typedarray | 1.3.0 | | new Int32Array() | typedarray | 1.3.0 | | new Uint32Array() | typedarray | 1.3.0 | | new Float32Array() | typedarray | 1.3.0 | | new Float64Array() | typedarray | 1.3.0 | | new BigInt64Array() | typedarray | 1.3.0 | | new BigUint64Array() | typedarray | 1.3.0 | | Promise.resolve('any') | promise | 1.4.0 | | function* () {} | generatorfunction | 1.4.1 | | (function* () {})() | generator | 1.4.1 | | new ArrayBuffer(8) | arraybuffer | 1.5.0 | | new DataView(buffer) | dataview | 1.5.0 |

Install

npm install @lopatnov/get-internal-type

Browser

<script src="//lopatnov.github.io/get-internal-type/dist/polyfills/array.forEach.min.js"></script>
<script src="//lopatnov.github.io/get-internal-type/dist/get-internal-type.min.js"></script>

Browser support: Cross-browser

Import package to the project

TypeScript

import getInternalType from 'get-internal-type';

JavaScript

var getInternalType = require("get-internal-type");

Gets object type

getInternalType(obj: any) => string

console.log(getInternalType(undefined)) // expected "undefined"
console.log(getInternalType(null)) // expected "null"
console.log(getInternalType(false)) // expected "boolean"
console.log(getInternalType(Symbol("123"))) // expected "symbol"
console.log(getInternalType(123)) // expected "number"
console.log(getInternalType(BigInt(9007199254740991))) // expected "bigint"
console.log(getInternalType("hello")) // expected "string"
console.log(getInternalType(/s+/gi)) // expected "regexp"
console.log(getInternalType(new Date())) // expected "date"
console.log(getInternalType(new Error("A mistake"))) // expected "error"
console.log(getInternalType({})) // expected "object"
console.log(getInternalType(new (class SomeCustomClass {}))) // expected "object"
console.log(getInternalType(() => {})) // expected "function"
console.log(getInternalType(function(){})) // expected "function"
console.log(getInternalType(class Simple {})) // expected "function"
console.log(getInternalType([1,2,3])) // expected "array"

console.log(getInternalType(new Set())) // expected "set"
console.log(getInternalType(new WeakSet())) // expected "set"
console.log(getInternalType(new Map())) // expected "map"
console.log(getInternalType(new WeakMap())) // expected "map"

console.log(getInternalType(new Int8Array(8))) // expected "typedarray"
console.log(getInternalType(new Uint8Array())) // expected "typedarray"
console.log(getInternalType(new Uint8ClampedArray())) // expected "typedarray"
console.log(getInternalType(new Int16Array())) // expected "typedarray"
console.log(getInternalType(new Uint16Array())) // expected "typedarray"
console.log(getInternalType(new Int32Array())) // expected "typedarray"
console.log(getInternalType(new Uint32Array())) // expected "typedarray"
console.log(getInternalType(new Float32Array())) // expected "typedarray"
console.log(getInternalType(new Float64Array())) // expected "typedarray"
console.log(getInternalType(new BigInt64Array())) // expected "typedarray"
console.log(getInternalType(new BigUint64Array())) // expected "typedarray"

console.log(getInternalType(Promise.resolve('any'))) // expected "promise"
console.log(getInternalType(function* () {})) // expected "generatorfunction" (ES6)
console.log(getInternalType((function* () {})())) // expected "generator"

console.log(getInternalType(new ArrayBuffer(16))) // expected "arraybuffer"
console.log(getInternalType(new DataView(new ArrayBuffer(16)))) // expected "dataview"

Demo

See, how it's working: https://runkit.com/lopatnov/get-internal-type-demo

Test it with a runkit: https://npm.runkit.com/%40lopatnov%2Fget-internal-type

Rights and Agreements

License Apache-2.0

Copyright 2019-2021 Oleksandr Lopatnov