ES6结合正则判断js数据类型

typeof 1           ---> ‘number‘
typeof ‘hello‘     ---> ‘string‘
typeof alert       ---> ‘function‘
typeof [1,2,3]     ---> ‘object‘
typeof {a:1,b:2}   ---> ‘object‘
typeof null        ---> ‘object‘
typeof NaN         ---> ‘number‘
typeof undefined   ---> ‘undefined‘
typeof Symbol()    ---> ‘symbol‘

console.log(Object.prototype.toString.call("hello"));//[object String]
console.log(Object.prototype.toString.call(123));//[object Number]
console.log(Object.prototype.toString.call(true));//[object Boolean]
console.log(Object.prototype.toString.call(undefined));//[object Undefined]
console.log(Object.prototype.toString.call(null));//[object Null]
console.log(Object.prototype.toString.call({name: "jerry"}));//[object Object]
console.log(Object.prototype.toString.call(function(){}));//[object Function]
console.log(Object.prototype.toString.call([]));//[object Array]
console.log(Object.prototype.toString.call(new Date));//[object Date]
console.log(Object.prototype.toString.call(/\d/));//[object RegExp]
function foo(){}
console.log(Object.prototype.toString.call(new foo()));//[object Object]

const isType = type =>(/^\[object\s(.*)\]$/.exec(Object.prototype.toString.call(type)))[1];
isType({}) // ‘Object‘
isType([]) // ‘Array‘