convert Persian and Arabic number to ENGLISH

var persianNumbers = [/۰/g, /۱/g, /۲/g, /۳/g, /۴/g, /۵/g, /۶/g, /۷/g, /۸/g, /۹/g] ; 
var arabicNumbers  = [/٠/g, /١/g, /٢/g, /٣/g, /٤/g, /٥/g, /٦/g, /٧/g, /٨/g, /٩/g] ; 

const fixNumbers =  (str) => {
  if(typeof str === 'string')
  {
    for(var i=0; i<10; i++)
    {
      str = str.replace(persianNumbers[i], i).replace(arabicNumbers[i], i);
    }
  }
  return str;
};


or use this function , a simpler one ;) 
function toEnDigit(s) {
    return s.replace(/[\u0660-\u0669\u06f0-\u06f9]/g,    // Detect
        function(a) { return a.charCodeAt(0) & 0xf }     // Convert
    )
}

minified function : 
function toEnDigit(s){return s.replace(/[\u0660-\u0669\u06f0-\u06f9]/g,function(a){return a.charCodeAt(0)&15})}

or
const toEnDigit=s=>s.replace(/[٠-٩۰-۹]/g,a=>a.charCodeAt(0)&15);