JavaScript regex for UK cell phone numbers

Question

JavaScript regex for UK cell phone numbers

I am currently implementing the following:

phone_number.match(/^((\+44\s?|0)7([45789]\d{2}|624)\s?\d{3}\s?\d{3})$/);

In most cases, the above code works well. Valid formats include:

07714000000 +447714000000

However, I also need to allow the format without the plus sign, for example:

447714000000

I tried adding a "?" between the "+" and "44", which worked in an online tester but not in JavaScript.

How can I achieve this?

Thank you

Update I am using this in the JQuery Validation plugin, here is the code:

jQuery.validator.addMethod('mobileUK', function(phone_number, element) {
    return this.optional(element) || phone_number.length > 9 &&
        phone_number.match(/^((\+?44\s?|0)7([45789]\d{2}|624)\s?\d{3}\s?\d{3})$/);
}, 'Please specify a valid mobile number');

It functions normally without the "?", but does not match with just "44".

javascript regex

Answer 1

Answer №1

Your regular expression is accurate.

To enhance the flexibility of your regex, consider allowing spaces within the string. One approach could be to remove all non-numeric characters, eliminating the need to check for +.

For example

var mobileNumberRegex = /^(?:(?:00)?44|0)7(?:[45789]\d{2}|624)\d{6}$/;
if (phoneNumber.replace(/\D/g, '').test(mobileNumberRegex)) alert('Phone number is valid!');

Please note: The provided regular expression also validates numbers formatted as 00447714000000.

Answer 2

Your regular expression is accurate.

To enhance the flexibility of your regex, consider allowing spaces within the string. One approach could be to remove all non-numeric characters, eliminating the need to check for +.

For example

var mobileNumberRegex = /^(?:(?:00)?44|0)7(?:[45789]\d{2}|624)\d{6}$/;
if (phoneNumber.replace(/\D/g, '').test(mobileNumberRegex)) alert('Phone number is valid!');

Please note: The provided regular expression also validates numbers formatted as 00447714000000.

JavaScript regex for UK cell phone numbers

Answer №1

For example

Similar questions

Destructuring part of an object within function parameters in JavaScript

Initiate the python script on the client's end

Is there a way to retrieve the data inputted into dynamically generated input boxes and send it to the controller using jQuery?

The .AppendChild() method does not appear to be working as expected following the completion of

I am eager to run the code that I retrieved from the server. I have access to the code in my console and I desire for it to execute on the main browser page

Commitments do not come with a collections feature

What could be the reason for my Angular component not updating its value?

Using Javascript to add the current date and time into a mysqli query

Why is Joi validation triggering an error when dealing with a nested object? Could this issue be connected to the use of dot notation in the

Tips on creating a slow and gradual border animation that unfolds smoothly

Leveraging PrimeFaces and the p:ajax component, trigger Ajax within an inputText field only when keystrokes lead to changes in the field

Using Vue.js to set both v-model and v-bind:value on one input element

What could be causing this issue to not function properly in JavaScript?

Encountering "Uncaught TypeError: Cannot read properties of undefined" while trying to render data in React, with some data rendering correctly and others throwing errors

The Node.js application that uses Express and connects to a MSSQL database is reporting that the database

Transforming an object into an array of objects with the power of JavaScript

Fade out a dynamically loaded content block using jQuery

How to design a dictionary schema using Mongoose

"Can you explain the functioning of this Node.js middleware when it doesn't require any

The timer freezes briefly at 1:60 before switching to 1:01