CODE EXAMPLE FOR JAVASCRIPT

string-mask javascript

var cardnumber = '4567 6365 7987 3783';
var first4 = cardnumber.substring(0, 4);
var last5 = cardnumber.substring(cardnumber.length - 5);

mask = cardnumber.substring(4, cardnumber.length - 5).replace(/d/g,"*");
console.log(first4 + mask + last5);
 Run code snippet