to change string to number code example
Example 1: Javascript string to int
var myInt = parseInt("10.256"); //10
var myFloat = parseFloat("10.256"); //10.256
Example 2: javascript convert string to number or integer
//It accepts two arguments.
//The first argument is the string to convert.
//The second argument is called the radix. This is the base number used in mathematical systems. For our use, it should always be 10.
var text = '42px';
var integer = parseInt(text, 10);
// returns 42