October 2011 web platform update

Now available in Safari on iOS

Limited availability

• Array.isArray(): The Array.isArray() static method checks whether a value is an array. Learn more.

• background-clip: The background-clip CSS property sets the extent of the background: the padding box, the content box, or the default border box. Learn more.

• :default: The :default CSS pseudo-class matches the default element in a group of related form controls, such as checkboxes and radio buttons with the checked attribute. Learn more.