Get the type of any object in JavaScript

type.js

function type(e) {
    var t = Object.prototype.toString.call(e),
        r = /\[object (\w+)\]/i.exec(t);
    return r && r[1].toLowerCase();
}

[1,"2", true, null, [], {}, function() {}, undefined].forEach(function(e){
    console.log(type(e))
});

//number
//string
//boolean
//null
//array
//object
//function
//undefined