Cloning does not maintain checked state of checkboxes in IE8 standards mode.

[keith bentrup]

In IE8 standards mode, if a user checks a checkbox and then that item is cloned, the checked state is not preserved. The problem is with the outerHTML value returned by the element and the method of cloning. A check for the documentMode can be used to correct the behavior.

[keith bentrup]

cloning checkbox behavior test

[keith bentrup]

A useful test in the clone function of manipulation.js might be:

if (document.documentMode && this.checked) {

some code

}

[keith bentrup]

sorry that should be if (document.documentMode == 8 && this.checked)

[keith bentrup]

 http://github.com/jquery/jquery/blob/master/src/manipulation.js#L204

// Handle the case in IE 8 where action=/test/> self-closes a tag
.replace(/\=([^="'>\s]+\/)>/g, '="$1">')
.replace(rleadingWhitespace, "")], ownerDocument)[0];

changed to

// Handle the case in IE 8 where action=/test/> self-closes a tag
.replace(/=([^="'>\s]+\/)>/g, '="$1">')
// Handle IE 8 case where initially unchecked checkboxes and radio buttons (now checked) do not clone properly
.replace(/(<input)/i,(document.documentMode == 8 && this.checked ? '$1 checked="checked"' : '$1'))
.replace(rleadingWhitespace, "")], ownerDocument)[0];

[snover]

Resetting milestone to future.

[snover]

Duplicate of #3879.