SpigotMC.org/Xenforo Resource Manager weighted rating display ‒ Used formula: (10 * 3 + averageRating * ratingCount) / (10 + ratingCount)

SpigotMCweightedRatingsDisplay.user.js

// ==UserScript==
// @name         SpigotMC weighted ratings display
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Display the weighted rating of a Xenforo Resource Manager resource which is used for sorting
// @author       Phoenix616
// @match        https://www.spigotmc.org/resources/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    var resourceListItems = document.getElementsByClassName("resourceListItem");
    if (resourceListItems !== null) {
        for (var i = 0; i < resourceListItems.length; i++) {
            addRealRating(resourceListItems[i]);
        }
    }
    var resourceInfo = document.getElementById("resourceInfo");
    if (resourceInfo !== null) {
        addRealRating(resourceInfo);
    }

    function addRealRating(e){
        var ratingNode = e.getElementsByClassName("rating")[0];
        var averageRating = parseFloat(ratingNode.getElementsByClassName("Number")[0].innerText);
        if (averageRating == 0) {
            return;
        }
        var hintNode = ratingNode.getElementsByClassName("Hint")[0];
        var ratingsCount = parseInt(hintNode.innerText.split(" ")[0]);
        var realRating = (10 * 3 + averageRating * ratingsCount) / (10 + ratingsCount);
        var realRatingNode = document.createElement("SPAN");
        realRatingNode.innerText = Math.round(realRating*1000)/1000;
        hintNode.parentNode.insertBefore(realRatingNode, hintNode);
    }
})();