Cannot set checkboxes in strict XHTML

[gglockner]

Suppose you have a strict XHTML page in jQuery 1.3.1, and suppose the DOM contains a checkbox. If you try to set the state of the checkbox via $("#c").attr("checked","checked") or clear it with $("#c").removeAttr("checked"), the state of the checkbox is not affected.

This affects Webkit and Firefox.

A detailed example can be found at:

​http://groups.google.com/group/jquery-dev/browse_thread/thread/df977021a6357ff3/

[gglockner]

Clarification: if the user clicks on the checkbox first, then jQuery is unable to change the state of the checkbox.

[dmethvin]

It sounds like this may be related to XML detection in Sizzle? See also #4054.

[gglockner]

Replying to dmethvin:

It sounds like this may be related to XML detection in Sizzle? See also #4054.

I wondered about this. Should XHTML be treated as XML or as HTML?

[andrew_]

This is directly related to ​http://dev.jquery.com/ticket/4283 (and is basically the same bug)

[andrew_]

Temporary Fix - Not a Patch

[andrew_]

I've uploaded a temporary fix by proxying attr and remoteAttr. It's not an ideal solution or fix. But for folks with the server sending application-xhtml+xml content type correctly, this will work.

[dmethvin]

I think this is another property-vs-attribute issue. The browser determines the initial value of the checked property by looking at the checked attribute. The checked property controls whether the box is checked or not.

[dmethvin]

Dup of #4283 which has more discussion.