Mask a phone number string with Javascript

Question

I have a string with a number:

const phoneNo = '2321392321';

and I want it to have this formt: (999) 999 - 9999.

Is it possible to do it with regex? I could split the number, take a substring, etc, but I feel like it'd be easier with regex, though I don't know how to tackle it.

See https://stackoverflow.com/questions/16699007/regular-expression-to-match-standard-10-digit-phone-number — The fourth bird, Sep 24 '20 at 14:51

Tibebes. M · Accepted Answer · 2020-09-24T14:31:47.343

0

Here is an example:

const phoneNo = '2321392321';

const formatted = phoneNo.replace(/(\d{3})(\d{3})(\d{4})/, '($1) $2 - $3')

console.log(formatted)

In the regex, we are capturing the digits into 3 separate groups and then we are back-referencing them inside .replace using $1, $2 and $3

edited Sep 24 '20 at 14:31

answered Sep 24 '20 at 14:26

Tibebes. M

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Mask a phone number string with Javascript

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