JavaScript | JQuery | Check if a variable is type of String | Number | Null | Undefined | Array | Object

console.log(Object.prototype.toString.call("This is string")); console.log(Object.prototype.toString.call(undefined)); console.log(Object.prototype.toString.call(0)); console.log(Object.prototype.toString.call(null)); console.log(Object.prototype.toString.call([])); console.log(Object.prototype.toString.call({}));

And respective output is as below:

[object String] [object Undefined] [object Number] [object Null] [object Array] [object Object]