Javascript: how to validate a text field which is alphanumeric only, without special characters or comma

Question

I have a text field to input tracking number that can have any length of numbers or alphabetic characters but no spaces, commas or special characters.I need the regular expression to match the above format.I have tried "/^[\w\s]+(?:,[^\s])+?$/" This validates "as," but not "as,," so odd number of commas are matched not even numbers.

Have you tried something like: /^[a-z0-9]+$/i This should allow just numbers and letters, taken from http://stackoverflow.com/questions/388996/regex-for-javascript-to-allow-only-alphanumeric — neilsimp1, Jun 22 '15 at 14:26
You say you do not want to match commas, but you have a comma in your regex; could you list a few examples of strings you would like to match and not match? — David Deutsch, Jun 22 '15 at 14:28

score 1 · Answer 1 · answered Jun 22 '15 at 14:40

1

You can simply try ^[A-z0-9]+$ where [A-z] will take all the lowercase & uppercase alphabet & [0-9] will take just numbers.

You can test your regular expression at online regex tester

answered Jun 22 '15 at 14:40

Sajid Rabbani

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David Deutsch · Answer 2 · 2015-06-22T14:50:58.937

0

If you really only want to match alphanumeric strings, the regex to use is /^[a-zA-Z0-9]+$/.

edited Jun 22 '15 at 14:50

answered Jun 22 '15 at 14:29

David Deutsch

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`\w` will match underscores, as well - it's the same as `[A-Za-z0-9_]`. – Oka Jun 22 '15 at 14:45
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Ah, good point; thanks. Have updated the answer. Though I'm still not sure if I am answering the right question :) – David Deutsch Jun 22 '15 at 14:51
Thanks my issue is fixed. – Archana Ramachandran Jun 22 '15 at 14:57

score 0 · Answer 3 · answered Jun 22 '15 at 14:37

Hi it's alphabet validation in this script

$('#textName').keypress(function (e) {
        var regex = new RegExp("^[a-zA-Z]+$");
        var str = String.fromCharCode(!e.charCode ? e.which : e.charCode);
        if (regex.test(str)) {
            return true;
        }
        else
        {
        e.preventDefault();
        alert('Please Enter Alphabate');
        return false;
        }
    });

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text" id="textName" />

Javascript: how to validate a text field which is alphanumeric only, without special characters or comma

3 Answers3