[whatwg] contenteditable="" values and isContentEditable

[Anne van Kesteren]

The following would match Internet Explorer (and Opera's current  
implementation):

  - The empty string
  - "true" (case-insensitive match)
    -> Content of the element is editable.

  - "false" (case-insensitive match)
    -> Content of the element is *not* editable.

  - Any other value
    -> Equivalent to not specifying the attribute.

This is based on some tests I made last year  
http://dump.testsuite.org/2006/contenteditable/ to find out what we had to  
do in Opera.


I think it would also be a good idea to add the isContentEditable DOM  
attribute to HTMLElement as it needs to be supported for compatibility and  
it allows you to find out whether or not an element is editable when the  
contenteditable attribute is not directly specified on it (but on an  
ancestor element).


-- 
Anne van Kesteren
<http://annevankesteren.nl/>
<http://www.opera.com/>