Question 258966 in Javascript Question posted in
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Javascript – Mask and insert hyphen after every 3 digits

I am trying to replace the below string like below:

var phone = "9871234567"
result = xxx-xxx-4567

Below is the js code I have worked upon, but this is not giving me the correct result.

var lastphdigit = phone.replace(/d(?=(?:D*d){4})/g, "x");
var lastphdighyp = lastphdigit.replace(/.{3}(?!$)/g, '$&-'); //xxx-xxx-456-7
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2

Answers


  1. 0

    Regex is not necessary for this problem. Using slice would be much simpler, just get the last 4 digits

    var phone = "9871234567"
console.log(`xxx-xxx-${phone.slice(6)}`)
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  2. 0

    Inspired by the comment @depperm gave, why not try this?
    We slice off 4 digits from the phone number, starting at the end, and then append it to a static string.

    var phone = "9871234567";
var maskedPhone = "xxx-xxx-"+ phone.slice(-4);

    This way, if the amount of digits in the phone number is variable, you will still always get the last 4 digits unmasked.
    IF this is a consideration, you should also count the amount of digits in the original phone number, and add x’s accordingly.

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