I’ve read about it in the user guide but I have a hard time figuring out exactly what to do. From what I understand, once you load the Javascript class, jQuery should be loaded too, but when I add the line

to my controller’s index function and refresh, all I get is

Unable to load the requested class: jquery

So naturally, I suppose I must place the jQuery file somewhere. Where would that be, and how can I access it?

Try This
$this->load->library(“js/jquery”);

Read the user guide page. You’re loading it wrong.

Or, better yet, don’t use the silly jQuery library, and write it manually separately from your PHP logic.