Find the jQuery Bug #8: Suspicious Selectors

This post seems to completely miss the point of selectors and how you can match classnames and use pseudo selectors. This isn't a bug in jQuery at all, but just the way css selectors work.

Especially telling is this phrase:

    Here are some examples of invalid selectors in jQuery because they contain invalid characters:
    $( "#person.name" ).addClass( "highlight" ); // FAIL

This is of course a perfectly valid selector, selecting a node that has both the id person and the class name. Saying that the selector is invalid is simply wrong.

Are there other languages other than JavaServer Faces that puts weird characters inside the id attribute of elements?