Masking last 4 digits in JavaScript

Question

Here I am using regex pattern to mask last 4 digits for Credit Card number.

$(\"#ccnumber\").html(ccnbr); //ccnumber refers to div ID

$(\"#ccnumber\").text(         


        

Answer 1

Here you are. But remember this is very, very bad practice.

$('#ccnumber').text(function(_,val) {

   return val.replace(/(\d*?)(\d{4})/, "************$1");
});

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp