.add fails on an empty jQuery object

[ealexs]

This is very simple, I create an empty jQuery object and I add DOM elements to it. In the end the .length is zero Works fine if i create a JS array with the same elements and add them like this: jQuery(some_list)

Let me give you the example:

jQuery(document).ready( function () { var coll = jQuery();

coll.add( document.getElementById("t1") ); coll.add( document.getElementById("t2") ); coll.add( document.getElementById("t3") );

alert(coll.length); });

coll.length = 0

PS: tested with v. 1.5.2 and 1.5.0

Thanks, Alex

[timmywil]

Confirmed: ​http://jsfiddle.net/timmywil/uYXQz/

[ajpiano]

This is not a bug, it's the way .add has always worked. .add does *not* mutate the original set, it returns a new set. If you want to save the result into the original variable, you have to use an assignment.

coll = coll.add( foo ) 

​http://jsfiddle.net/uYXQz/1/

This hit me once and comes up regularly, I even listed it as a caveat to be aware of on ​Fixing These jQuery. But is it something that we plan to fix, changing the behaviour of add all over the place? I don't think so, so I'm gonna close this wontfix for now.