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Editorial Team
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Asked: 2026-05-28T22:47:57+00:00

I understand that there is a *.className selector since there can be multiple html

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I understand that there is a *.className selector since there can be multiple html elements with class=className.

But for the ID attribute which should be unique, why does *# exist and when do we use it?

Thanks.

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1 Answer

  1. Editorial Team

    Just because IDs are supposed to be unique doesn’t mean they are. You can create multiple elements with the same ID, but you shouldn’t. CSS doesn’t care anyway, lack of uniqueness would just screw with Javascript. For example, if you have this:

    <div id='blah'>blah</div>
<div id='blah'>blah</div>
<div id='blah'>blah</div>
<div id='blah'>blah</div>

    Then jQuery('#blah') returns [ div#blah ], whereas jQuery('*#blah') returns [ div#blah, div#blah, div#blah, div#blah ].

    jsFiddle Demo

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