CODEWITHSUNDEEP
javascripthtmlregex
Kiran Dash
Kiran Dash

Reputation: 4956

Regular expression for email id to avoid email input in a textfield

Problem: I am having a textarea in which I want to restrict users from entering their email id. So,that when they type email id the text area should turn red and pop-up a message saying "you can't enter your email address in this field".

My solution: Here is the simple HTML code for textarea:

<textarea class="replyToClient" placeholder="Message"></textarea>

I am currently using the below mentioned javascript code to detect email id and replace it with NULL.

<script type="text/javascript">
        //EMAIL ID DETECTION AND REPLACEMNET
        $(function() {
            $(".replyToClient").change(function() {
                $(this).val( function(idx, val) {
                    return val.replace(/\b(\w)+\@(\w)+\.(\w)+\b/g, "");
                });
            });
        });

        </script>

What this does is replaces something like "[email protected]" written in textarea with blank.

Expectation: I am trying to build a strong regexp here so that I can detect email id in any form such as "example@gmail" or "example at the rate gmail dot com" and then (the easy part)replace it from the textarea or come up with a pop-up.

So, my concern is mainly on the regular expression to detect email id in it's original format and also in the possible broken formats as mentioned above.

Upvotes: 0

Views: 144

Answers (2)

Andris Leduskrasts
Andris Leduskrasts

Reputation: 1230

A bit of update to Roberts answer. The regex shown does not process dashes, underscores and dots are not taken accout for, which are standard for e-mails, as well as england based e-mails (.co.uk)

This is important for the first word. [email protected] and john-wick at gmail dot com will respectively result in [email protected] and wick at gmail dot com, leaving unwanted words in your text area. Try:

[A-Za-z0-9.\-\_]*?@\w+(\.\w+)?(\.\w+)?|[A-Za-z0-9.\-\_]*? at \w+ dot \w+( dot \w+)?

The regex seems to work for all the mentioned possibilities as [email protected], john-wick at gmail dot com and [email protected], john-wick at example dot co dot uk.

If there are other broken formats people tend to write their e-mails, they should probably be dealt with one at a time.

Upvotes: 1

Robert Eisele
Robert Eisele

Reputation: 115

give this a shot:

val.replace(/\w+@\w+(\.\w+)?|\w+ at \w+ dot \w+/ig, "");

Cheers

Upvotes: 1

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