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 is a Javascript approach without the use of RegEx:

Check jsFiddle demo

var mainStr = '1234567891234567',
    vis = mainStr.slice(-4),
    countNum = '';

for(var i = (mainStr.length)-4; i>0; i--){
    countNum += '*';
}

alert(countNum+vis);