Description of import of various jQuery libraries into Moodle:

1/ download jQuery JS from http://jquery.com/download/,
   delete old files and edit plugins.php and lib/requirejs/moodle-config.js

2/ download jQuery UI files from http://jqueryui.com/download/all/,
   delete old files and edit plugins.php and lib/requirejs/moodle-config.js
   delete unnecessary files: external folder, index.html, AUTHORS.txt, package.json

3/ download all UI themes and update smoothness theme

4/ run phpunit tests

5/ open http://127.0.0.1/lib/tests/other/jquerypage.php

6/ Update the version of jquery in core_privacy\local\request\moodle_content_writer::write_html_data()

Petr Skoda

Note: jQuery.trim() function and :first pseudo-class are deprecated. We use String.prototype.trim() and .first()
in Moodle code instead. Please note that in third party libraries there are still usages of jQuery.trim
for example xhprof and jQuery UI.