If you want to keep performance, maybe it's better to do:
if( $("#myid").is('div.myclass')) alert("YEAH, WE GOT IT");
else alert("Ha, my ID is misused!!");
Wow. When I started writing this reply, I thought of using tagName and
className,
but is() is so much more elegant.
Christof Donat wrote:
> Hi,
>
>
>> ID should be uniqe over the page, so div#myid is redundant.
>>
>
> No, it isn't. It should return an empty jQuery-Object in case the Element
> with
> the id "myid" is not a div. That is usefull when you produce your Content
> dynamically (e.g. with PHP). The same is true for .myclass#myid, or even
> div.myclass#myid which should return the element with the id "myid" only if
> it is a div and has the class "myclass":
>
> if( $("div.myclass#myid").length > 0 ) alert("YEAH, WE GOT IT");
> else if( $("#myid").length > 0 ) alert("Ha, my ID is misused!!");
>
> Christof
>
>
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