Required attribute is not working in Safari.
To fix this, I'm using Webshim. It was all working perfectly, until I noticed that when I use onsubmit on the form tag, it fires when you submit, no matter that there are some required inputs empty. You see the "Please fill out this field" on the input, but the onsubmit functions fires anyway.
<form onsubmit="alert('hi')" action="#">
<input placeholder="native input works" required>
<input type="submit">
</form>
This is how I initialize Webshim:
<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/webshim/1.16.0/dev/polyfiller.js"></script>
<script>
webshim.activeLang('en');
webshims.polyfill('forms');
webshims.cfg.no$Switch = true;
</script>
Here you have a working Example. You can try it on Safari, and in Chrome, and you'll see the Alert firing on safari, and not in chrome.
https://jsfiddle.net/3pxsvxxj/
Please, I need to solve this, and I can't find a way.
Cheers.