Setting select attribute doesn't change dropdown position in firefox

[anonymous]

Firefox 9 & 11 under Windows 7 Professional

The dropdown HTML:

<select id="periodSelect" name="periodSelect">
<option value="0" selected>Choose period</option>
<option value="9">2011, P01</option>
<option value="11">2012, P01</option>
<option value="2">011, P10</option>
<option value="1">2013, P01</option>
</select>

jquery code:
$('#periodSelect option').removeAttr('selected');
$("#periodSelect option[value='11']").attr('selected',true);

description: The code, when executed for the first time, doesn't chenge what I can se in the dropdown. When executed for the second time it makes the change. The change happens also when I select an option from the drop down and then execute the code.

working example (not working in Firefox):
​http://jsfiddle.net/LXz8J/

The code works for latest version of chrome (17) and IE8

[sindresorhus]

Not really a jQuery bug since it's reproducible using native DOM methods too (in Firefox, not Chrome): ​http://jsfiddle.net/scjK9/

To get it to work, you can remove the first line. You don't actually need to remove the 'selected' property before adding it to a option element. Just add it directly and the browser will be smart enough to switch to the recently selected option element.

[anonymous]

Replying to sindresorhus:

Not really a jQuery bug since it's reproducible using native DOM methods too (in Firefox, not Chrome): ​http://jsfiddle.net/scjK9/

To get it to work, you can remove the first line. You don't actually need to remove the 'selected' property before adding it to a option element. Just add it directly and the browser will be smart enough to switch to the recently selected option element.

The code in the changed history is not working at all, so the bug is stell open!!!

[timmywil]

@anonymous: use properties, not attributes. ​http://jsfiddle.net/timmywil/xyH32/

[anonymous]

@timmywil: that was really good help for me to solve some weird behaviour appeared in Firefox 27.0, didn't even know that there were differences between attributes and properties (attr() vs prop())