Mask email in javascript

Question

I am new for javascript, i want to mask email id in js

Like [email protected] should mask as m********[email protected]. how do i achieve in js. My below code is not working in ie browser

 var maskid = "";
var myemailId =  "[email protected]";
var prefix= myemailId .substring(0, myemailId .lastIndexOf("@"));
var postfix= myemailId .substring(myemailId .lastIndexOf("@"));

for(var i=0; i<prefix.length; i++){
    if(i == 0 || i == prefix.length-1 ) {
        maskid = maskid + prefix[i].toString();
    }
    else {
        maskid = maskid + "*";
    }
}
maskid =maskid +postfix;

I want to handle in JS is the requirement.

Thanks

Answer 1

You can use a regular expression based replacement:

var maskid = myemailId.replace(/^(.)(.*)(.@.*)$/,
     (_, a, b, c) => a + b.replace(/./g, '*') + c
);

Be careful:

• to do it server side, as any client side replacement could be overturned by the user.
• that not all email adresses are matching your requirement
• that when it matches, it could also not be hiding much

Answer 2

let str = "[email protected]"
str = str.split('');
let finalArr=[];
let len = str.indexOf('@');
str.forEach((item,pos)=>{
(pos>=1 && pos<=len-2) ? finalArr.push('*') : finalArr.push(str[pos]);
})
console.log(finalArr.join(''))