Mask US phone number string with JavaScript

Question

I need regular express for US Phone Number format.I want to replace the phone number string into below US phone number string format in JavaScript.

var number = "4031234789";

And I want to mask it in below format:-

number = number.mask('(000) 000-0000');

Can anyone show me a regular expression for that in JavaScript?

possible duplicate of [How can I mask an HTML input using javacript?](http://stackoverflow.com/questions/7665792/how-can-i-mask-an-html-input-using-javacript) — mplungjan, Jul 15 '13 at 09:47
There are all these answers that people gave you on [your other question](http://stackoverflow.com/questions/17650197/mask-javascript-variable-value). — elclanrs, Jul 15 '13 at 09:49

score 154 · Answer 1 · edited May 28 '23 at 19:55

154

This answer assumes you want the following format: (000) 000-0000 (as the OP states).

^{There are multiple ways to implement this, but here are a couple different approaches:}

If you want to simply mask the number on the blur event (when the field loses focus), then you could use the following:

document.getElementById('phone').addEventListener('blur', function (e) {
  var x = e.target.value.replace(/\D/g, '').match(/(\d{3})(\d{3})(\d{4})/);
  e.target.value = '(' + x[1] + ') ' + x[2] + '-' + x[3];
});

<p>Masked on the blur event (remove focus).</p>
<input type="text" id="phone" placeholder="(555) 555-5555"/>

Alternatively, if you would rather mask the number while typing, you can listen to the input event and then conditionally mask the number based on the regex match:

document.getElementById('phone').addEventListener('input', function (e) {
  var x = e.target.value.replace(/\D/g, '').match(/(\d{0,3})(\d{0,3})(\d{0,4})/);
  e.target.value = !x[2] ? x[1] : '(' + x[1] + ') ' + x[2] + (x[3] ? '-' + x[3] : '');
});

<input type="text" id="phone" placeholder="(555) 555-5555"/>

edited May 28 '23 at 19:55

Dexygen

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answered Mar 29 '15 at 22:00

Josh Crozier

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This works great! I was able to easily adapt it to mask a foreign zip code. – PeterM Feb 17 '16 at 17:41
3

Was searching for exactly this kind of simple function. Most were bloated and didn't work well. Woo! – mix3d Jan 31 '17 at 20:58
Doesn't work in compatibility mode on IE11 :( but works beautifully when compatibility mode is off – LeSteelBox Sep 21 '17 at 21:16
@josh-crozier It is not working in mobile. Not sure about Android but iphone it is not working. – Dolly Dec 21 '22 at 21:29
When we delete typed numbers from mobile, it wont allow after separator symbol. – Dolly Dec 21 '22 at 21:38

score 11 · Answer 2 · edited Sep 17 '21 at 05:51

11

You can use regular expression and then concatenate to form your string.

var USNumber = "4031234789".match(/(\d{3})(\d{3})(\d{4})/);
USNumber = "(" + USNumber[1] + ") " + USNumber[2] + "-" + USNumber[3];
console.log(USNumber);

edited Sep 17 '21 at 05:51

dota2pro

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answered Jul 15 '13 at 09:55

Zohaib Ahmed Shakir

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Ali Raza · Answer 3 · 2021-12-09T11:28:46.910

4

      document.getElementById('organization_phone').addEventListener('input', function (e) {
        var x = e.target.value.replace(/\D/g, '').match(/(\d{0,3})(\d{0,3})(\d{0,4})/);
        e.target.value = '(' +x[1] + ') '+ x[2] + '-' + x[3]
      });

<input type="text" id="organization_phone" name="organization_phone"  required placeholder="(998) 000-0000">

edited Dec 09 '21 at 11:28

answered Nov 04 '21 at 11:18

Ali Raza

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Akbarali · Answer 4 · 2021-11-10T13:04:20.783

For those who want to publish the number of Uzbekistan in JS

  document.getElementById('organization_phone').addEventListener('input', function (e) {
    var x = e.target.value.replace(/\D/g, '').match(/(\d{0,3})(\d{0,2})(\d{0,3})(\d{0,2})(\d{0,2})/);
    e.target.value = '+(' + x[1] + ') ' + x[2] + '-' + x[3] + '-' + x[4] + '-' + x[5];
  });

 <input type="text" id="organization_phone" name="organization_phone"  required placeholder="(+998) 99-000-00-00" value="+998">

score 1 · Answer 5 · answered Sep 27 '22 at 04:20

I thought I edited a few things to make it match the 555-555-5555 format but I get a javascript error for x[1]. It says Uncaught TypeError: Cannot read properties of null (reading '1') The code still works but being below average user of JS, I'm still learning and I would really like to try and understand what's going on here. Thanks!

 document.getElementById('Main_Phone').addEventListener('input', 
 function (e) 
 {
 var x = e.target.value.replace(/\D/g, '').match(/^(\d{3})(\d{3}). 
 (\d{4})$/);
 e.target.value = (x[1] + '-' + x[2] + '-' + x[3]);     
 });

score 0 · Answer 6 · answered Apr 12 '22 at 20:29

    document.addEventListener("DOMContentLoaded", () => {
        const input = document.querySelector("#tel-input");

        input.addEventListener('input', (e) => {
            if (e.target.value)
            {
                const x = e.target.value.replace(/\D/g, '').match(/(\d{0,3})(\d{0,3})(\d{0,4})/);
                e.target.value =  + x[1] + (x[2] ? `-${x[2]}` : '') + (x[3] ? `-${x[3]}` : '')
            }
        });
    });

<input id="tel-input" type="tel" class="form-control" value="" placeholder="xxx-xxx-xxxx" maxlength="12"/>

PavloM · Answer 7 · 2022-07-03T13:27:08.263

There is my solution

According to wikipedia, the maximum phone number length is 15 digitals

The code below implements the mask +00 (000) 000-00-00-000

Also, the backspace works as well

document.querySelector('[name="phone_number"]')
    .addEventListener('input', function (e) {
        var x = e.target.value.replace(/\D/g, '')
            .match(/(\d{0,2})(\d{0,3})(\d{0,3})(\d{0,2})(\d{0,2})(\d{0,3})/);

        if (!x[1]) {
            e.target.value = '+';

            return;
        }

        if (!x[2]) {
            e.target.value = `+${x[1]}`;

            return;
        }

        e.target.value = `+${x[1]} (${x[2]}`
            + ( x[3] ? `) ${x[3]}` : '' )
            + ( x[4] ? `-${x[4]}` : '' )
            + ( x[5] ? `-${x[5]}` : '' )
            + ( x[6] ? `-${x[6]}` : '' );
    });

<input name="phone_number" placeholder="+00 (000) 000-00-00-000">

score -1 · Answer 8 · edited Apr 21 '18 at 04:40

-1

You can use my package https://github.com/jsonmaur/coverup, which can mask the input string onblur and maintain the symbols in the string.

edited Apr 21 '18 at 04:40

Soul

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answered May 11 '16 at 20:13

jsonmaur

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score -2 · Answer 9 · edited Dec 19 '16 at 16:57

-2

Use phone number masking plugins for that.

Check the following plugins:

edited Dec 19 '16 at 16:57

Tim S. Van Haren

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answered Jul 15 '13 at 09:47

웃웃웃웃웃

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The question asked about how to mask a US phone number in javascript, not what libraries there are that already do this. – Tim Sep 07 '20 at 18:18

Mask US phone number string with JavaScript

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