onsubmit is always executed.

[kapitancho]

If I run this on chrome, I get the alert ONLY when there is a value in the required field.

If I use h5Validate, I always see the alert. That's not consistent. In my opinion, the alert message should be shown only if the form is valid (like it happens in Chrome)

How to reproduce:
Just add
onsubmit="alert(123)"
for any form in the demos

[zoltan-dulac]

@kapitancho: I am assuming you mean html5Forms.js and not h5Validate, since that is a different project. :-)

I have an example of html5Forms.js with the usecase you mention here:

http://www.useragentman.com/tests/html5Forms/tests/html5Forms/patternRequired-onsubmit.html

You are correct. Browsers that have a full native implementation of the official HTML5 Forms module (like Chrome and Firefox) will not produce the alert, while html5Forms.js produces the alert. Thanks for "alerting" me to this issue :-) ... will look into fixing this in a subsequent release soon.

Z.