Safari 8 is missing critical support for the required attribute on HTML5 input elements, and the reason therefor is not obvious or documented. A developer is left to implement a JavaScript-based workaround in order to have form behaviour similar to other browsers. I would like to request that the required attribute on HTML5 form elements is implemented, as per https://html.spec.whatwg.org/multipage/forms.html#attr-input-required. The following test case isolates this, and can be viewed here: http://jsbin.com/decaqabike/1/