Why doesn't @contenteditable work on the iPhone?

Question

Safari HTML Reference: Supported Attributes says:

contenteditable

If true, the element can be edited on the fly; if false, it cannot.

Answer 1

The design mode and content editable are working fine in IOS 5.But in previous versions it is not working.There is post

http://mobile.tutsplus.com/tutorials/mobile-web-apps/safari-5_html5/