September 2012 web platform update

Now available in Safari on iOS

Limited availability

• <details>: The <details> element is a disclosure widget which can be expanded to reveal additional content. When closed, only the nested <summary> element is visible. Learn more.

• dirname: The dirname attribute of <textarea> and <input> HTML elements includes the field's writing direction as form data on submission. Learn more.

• translate attribute: The translate HTML attribute marks whether an element's text should be translated. Learn more.