Scratch-Project-Analytics.user.js

// ==UserScript==
// @name         Scratch Project Analytics
// @version      1
// @description  adds engagement rates for a project's likes/fav's out of total views an to MyStuff
// @author       NickyNouse
// @match        https://scratch.mit.edu/projects/*
// @match        https://scratch.mit.edu/mystuf*
// @grant        none
// ==/UserScript==

if (location.href.indexOf('projects') != -1) {
    var views = $('#total-views .icon').text();
    
    var xtemp = parseInt($('#stats .favorite.icon').text().replace(/\W/g, ''));
    $('#stats .favorite.icon').append(' ('+ Math.round(100*xtemp/views) + '%)');
    
    xtemp = parseInt($('#stats .love.icon').text().replace(/\W/g, ''));
    $('#stats .love.icon').append(' ('+ Math.round(100*xtemp/views) + '%)');
} else if (location.href.indexOf('stuff') != -1) {
    
    var style89 = "<style>.media-stats {width: 170px !important; text-align: left !important; -webkit-column-count: 2; -moz-column-count: 2; column-count: 2;}</style>";
    $('head').append(style89);
    
    var analyzed = false;
    
    var analyticsobserver = new MutationObserver(function(mutations) {
        if($('.media-list').length && $('.media-item-content:not(.not-shared):not(.analyzed)').length) {
            //analyzed = true;
            analyticsobserve();
        }
    });
    analyticsobserver.observe($('#content')[0], {'childList': true, 'subtree': true,});
    
    var analyticsobserve = function() {
        $('.media-item-content:not(.not-shared):not(.analyzed)').each( function(value, index) {
            $(this).addClass('analyzed');
            var projvals = new Array();
            $(this).find('.stat').each( function(value, index) {
                projvals.push(parseInt($(this).text().replace(/\W/g, '')));
            });
            $(this).find('.stat').eq(2).append(' ('+ Math.round(100*projvals[2]/projvals[0]) + '%)');
            $(this).find('.stat').eq(3).append(' ('+ Math.round(100*projvals[3]/projvals[0]) + '%)');
        });
    }
}