117 lines
2.4 KiB
JavaScript
117 lines
2.4 KiB
JavaScript
var isBuffer = require('is-buffer');
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var toString = Object.prototype.toString;
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/**
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* Get the native `typeof` a value.
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*
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* @param {*} `val`
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* @return {*} Native javascript type
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*/
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module.exports = function kindOf(val) {
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// primitivies
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if (typeof val === 'undefined') {
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return 'undefined';
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}
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if (val === null) {
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return 'null';
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}
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if (val === true || val === false || val instanceof Boolean) {
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return 'boolean';
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}
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if (typeof val === 'string' || val instanceof String) {
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return 'string';
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}
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if (typeof val === 'number' || val instanceof Number) {
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return 'number';
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}
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// functions
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if (typeof val === 'function' || val instanceof Function) {
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return 'function';
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}
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// array
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if (typeof Array.isArray !== 'undefined' && Array.isArray(val)) {
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return 'array';
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}
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// check for instances of RegExp and Date before calling `toString`
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if (val instanceof RegExp) {
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return 'regexp';
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}
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if (val instanceof Date) {
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return 'date';
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}
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// other objects
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var type = toString.call(val);
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if (type === '[object RegExp]') {
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return 'regexp';
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}
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if (type === '[object Date]') {
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return 'date';
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}
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if (type === '[object Arguments]') {
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return 'arguments';
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}
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if (type === '[object Error]') {
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return 'error';
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}
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// buffer
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if (isBuffer(val)) {
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return 'buffer';
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}
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// es6: Map, WeakMap, Set, WeakSet
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if (type === '[object Set]') {
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return 'set';
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}
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if (type === '[object WeakSet]') {
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return 'weakset';
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}
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if (type === '[object Map]') {
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return 'map';
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}
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if (type === '[object WeakMap]') {
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return 'weakmap';
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}
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if (type === '[object Symbol]') {
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return 'symbol';
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}
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// typed arrays
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if (type === '[object Int8Array]') {
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return 'int8array';
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}
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if (type === '[object Uint8Array]') {
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return 'uint8array';
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}
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if (type === '[object Uint8ClampedArray]') {
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return 'uint8clampedarray';
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}
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if (type === '[object Int16Array]') {
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return 'int16array';
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}
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if (type === '[object Uint16Array]') {
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return 'uint16array';
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}
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if (type === '[object Int32Array]') {
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return 'int32array';
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}
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if (type === '[object Uint32Array]') {
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return 'uint32array';
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}
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if (type === '[object Float32Array]') {
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return 'float32array';
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}
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if (type === '[object Float64Array]') {
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return 'float64array';
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}
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// must be a plain object
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return 'object';
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};
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