How get value numerals from x= "11" that was x=11 with help JavaScript

Answer 1

I believe you are asking how to cast a string datatype into an integer

Javascript has a built in function called parseInt which allows you to do this

Example:
var x = '11';
var y = parseInt(x);

y now equals 11

Answer 2

You can use a regex to get the first integer :

var num = parseInt(str.match(/\d+/),10)

If you want to parse any number (not just a positive integer, for example "asd -98.43") use

var num = str.match(/-?\d+\.?\d*/)

Now suppose you have more than one integer in your string :

var str = "a24b30c90";

Then you can get an array with

var numbers = str.match(/\d+/g).map(Number);

Result : [24, 30, 90]