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