jQuery-查找包括自我

Question

This gives empty output, because console.log is never called. How can i force jQuery to find on all elements, even top level elements?

    $("<div attr></div><div></div>")
       .andSelf()
       .find('[attr]')
       .each(function (index, el) {console.log(el);});

Answer 1

You can use find to find the descendant elements with the said properties using .find('[attr]') then add back the root elements matching the filter using .addBack('[attr]')

$("<div attr></div><div></div>")
    .find('[attr]')
    .addBack('[attr]')
    .each(function (index, el) {
    console.log(el);
});

Demo: Fiddle