What does the "@" sign in jQuery selector means ?

Question

What does the @ sign in the following code means ?

$("input[@type=checkbox][@checked]").each(
    function() {
        ...
    }
);

Answer 1

This is an xpath convention for attribute selection, which was discontinued two versions ago.
You should remove the @ sign if you want the selectors to work on the current version.

Alternatively, the selector $("input:checkbox:checked") should work just the same.