Question

I’m trying to allow users to click on the [+] trigger and have it’s sibling div open and close to display that topic’s information.

Why can’t this find the sibling?

$('.moreInfo').hide();
$('a.triggerButton').click(function(){
  var $this = $('a.triggerButton');
  $this.find().siblings('.moreInfo').slideToggle('fast');
});

I made a fiddle here. Thanks for your help.

Answer 1

Because firstly you should address this anchor element, and secondly get rid of useless .find():

$("a.triggerButton").click(function() {
    $(this).siblings(".moreInfo").slideToggle("fast");
});

DEMO: http://jsfiddle.net/JFw9g/9/