CODEWITHSUNDEEP
javascriptregex
kooshy
kooshy

Reputation: 134

reg ex in javascript to allow a specific phone number format (123) 456-7890 only

I currently have a function to validate a phone number. This info gets entered in a web app. It is later displayed in a windows app, and that's where the issue comes. I have a specific function that populates data to controls, but it only accepts one type of phone number format and that is

(123) 456-7890

This is the function we've been using, but it lets the user enter any format as long as it's 10 digits, so it can be something like 123-45-6789

function validatePhone(fld) {
    var error = "";
    var stripped = fld.value.replace(/[\(\)\.\-\ ]/g, '');     

   if (fld.value == "") {
        return false;
    } else if (isNaN(parseInt(stripped))) {
        return false;
    } else if (!(stripped.length == 10)) {
        return false;
    } 
    return true;
}

I've looked through the web and usually they have a specific reg ex for 2 formats (123) 456-7890 | 123-456-7890 and the reg ex is (((\d{3}) ?)|(\d{3}-))?\d{3}-\d{4} however in my case I can only allow 1 format (with paranthesis) Any way to change this so it can validate whether the phone number is in the exact format as I showed above? Thanks in advance

Upvotes: 0

Views: 1026

Answers (2)

P Varga
P Varga

Reputation: 20269

Use the below RegExp to validate the phone number

const valid = "(123) 456-7890";
const invalid = "1234567890";
const re = /^\(\d{3}\) \d{3}-\d{4}$/;
console.log(
  re.test(valid),
  re.test(invalid)
);

Upvotes: 0

Maheer Ali
Maheer Ali

Reputation: 36584

You can try the following regex

let regex = /^\(\d{3}\) \d{3}-\d{4}$/
console.log(regex.test("(123) 456-7890")) // true
console.log(regex.test("123-456-7890")) //false

Upvotes: 2

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