JavaScript Judging data types

TypeOf Judge 6 kinds of

1 //typeof 6 Kinds2Console.log (typeof1);// Number3Console.log (typeof‘‘);//string4Console.log (typeof true);//Boolean5Console.log (typeof{});//Object6Console.log (typeofFN);//function7Console.log (typeofundefined);//undefined

Method:

1         function Istype (value) {// does not support IE62             var str =  Object.prototype.toString.call (value); 3             return  Str.slice (8,str.length-1). toLowerCase (); 4         }

This comparison is all

1         vardata =NewDate ();2         functionfn () {3Alert (1)4         }5 6Console.log (Istype (1));// Number7Console.log (Istype ("1"));//string8Console.log (Istype (true));//Boolean9Console.log (Istype (FN));//functionTenConsole.log (Istype (NULL));//NULL OneConsole.log (Istype (undefined));//undefined AConsole.log (Istype ({}));//Object -Console.log (Istype ([]));//Array -Console.log (Istype (/12/));//RegExp theConsole.log (Istype (data));//Date

JavaScript Judging data types