jQuery selector stored in variable: How to Select specific elements by attribute value?

Question

I know that I get an element(s) by attribute via, eg

$('.js_aBunchOfElements span[data-stuff="special"]');

Yet once I store the selector in a variable:

var bunch = $('.js_aBunchOfElements span');

I am confused how to search within bunch for my elements with the attribute data-stuff="special" .

Answer 1

bunch.filter('[data-stuff=special]')应该这样做。

Answer 2

bunch.filter(function() {
    return $(this).attr("data-stuff") == "special";
});