JS基礎——資料型別判斷typeof、instanceof、Object.prototype.toString

摘要： typeof instanceof Object.prototype.toString 對應測試結果如下： typeof test instanceof ...

typeof
instanceof
Object.prototype.toString

對應測試結果如下：

	typeof test	instanceof	Object.prototype.toString.call(test)
var test = 'xuriliang';	string	test instanceof String//false	[object String]
var test = 27;	number	test instanceof Number//false	[object Number]
var test = true;	boolean	test instanceof Boolean//false	[object Boolean]
var test = [1,2,3];	object	test instanceof Array//true	[object Array]
		test instanceof Object//true
var test = null;	object	test instanceof Object//false	[object Null]
var test = undefined;	undefined	test instanceof Object//false	[object Undefined]
var test = new String('xuriliang')	object	test instanceof String//true	[object String]
		test instanceof Object//true
var test = new Number(27)	object	test instanceof Number//true	[object Number]
		test instanceof Object//true
var test = new Boolean(true)	object	test instanceof Boolean//true	[object Boolean]
		test instanceof Object//true
var test = new Array(1,2,3)	object	test instanceof Array//true	[object Array]
		test instanceof Object//true
var test = function(){}	function	test instanceof Function//true	[object Function]
		test instanceof Object//true
var test = /d/	object	test instanceof RegExp//true	[object RegExp]
		test instanceof Object//true