HTML5 Pattern Api - No HTML tags - Form Validation

Question

So I love using the html5 pattern api. I want to setup a pattern(regex) that will not allow html tags to be entered into the form. I have a working example of the pattern api below. What regex should I use to stop all html tags?

<form onsubmit="alert('Boom!'); return false;">
    <input type="text" pattern="[0-1]">
    <input type="submit" value="submit">
</form>

As a rule of thumb, don't try to stop people submitting things that look like HTML, just treat the data as text (so replace < with <, & with &, and so on when putting the submitted text into an HTML document). — Quentin
– Quentin, Commented Dec 11, 2013 at 1:04
Yeah that's a good idea. But I'm aiming for native html5 validation. — etoxin
– etoxin, Commented Dec 11, 2013 at 1:07

Vasili Syrakis · Accepted Answer · 2013-12-11 05:23:10Z

1

You want to stop any HTML tags? Easy:

</?[a-z][a-z0-9]*[^<>]*>

You can also match specific tags with this regex:

<specific_tag[^>]*>(.*?)</specific_tag>

answered Dec 11, 2013 at 5:23

Vasili Syrakis

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