Jquery Bad practices [closed]

Question

What are the JQuery bad/worst practices you have seen, written or thing should be avoided?

Answer 1

A thing you should avoid is using the "easy to use" selectors in every line once again, because the JavaScript implementation of selectors is not that efficient. Of course, the jQUery guys are optimizing it, however I think you should use it as little as possible.

So, this is a bad practice.

$("li ul span").show();
$("li ul span").toggleClass("bubu");

Chaining is good

$("li ul span").show().toggleClass("bubu");

And remembering things in a local variable is also not bad:

var allspans = $("li ul span");
allspans.show();
allspans.toggleClass("bubu");