/**
 * Enables scrolling to a class instead of an ID for applications like Moodle that use YUI.
 * YUI often litters your HTML code adding what appears to be random ID's for every element. This means that you can't
 * actually use ID's in your HTML, and hence, cannot create in-page links. This solves that problem.
 * Usage: 
 *     1) Add this code to your web page.
 *     2) Add a class called goto-WhatEverYouWant such as class="goto-section5" to an element.
 *     3) When you load the page, any classes starting with goto- will become an ID for that element.
 *        This will enable you to create in-page links such as <a href="#section5">Section 5</a>
 * Consider combining this with the optional smooth scrolling Gist for a nice touch.
 * Requires: jQuery
 * @Copyright 2016-2018 TNG Consulting Inc. GPLv3+ license.
 */
jQuery( document ).ready(function() {
    // Get elements that include a class that starts with prefix.
    var prefix='goto-';
    jQuery("[class*='" + prefix + "']").each(function() {
        // More than one class? Find the matching one for each element.
        var classList = this.className.split(/\s+/);
        var thisClass = jQuery.grep(classList, function(item, index) {
            return item.indexOf(prefix) === 0;
        });
        // Remove the class name from the element and set the element id but without the prefix.
        jQuery(this).removeClass(thisClass[0]).prop("id", thisClass[0].slice(prefix.length));
    });
});