udemy-higher-standards.user.js

// ==UserScript==
// @name         Simple Udemy Higher Standards Button
// @namespace    Cuyler Stuwe (salembeats)
// @version      1.5
// @description  Assume we want only 4+ star courses (since others' standards for reviews are too low), and take the decimal to give a X/10 rating. (i.e., a 4.4/5 course becomes a 4/10 course).
// @author       Cuyler Stuwe (salembeats)
// @include      https://www.udemy.com/*
// @exclude      https://www.udemy.com/*/learn/v4/content
// @grant        unsafeWindow
// ==/UserScript==

unsafeWindow.applyHigherStandards = function() {
	document.querySelectorAll("[class*='star-rating--reviews__stats']:not(.better-stats)")
        .forEach(el => {
              el.classList.add("better-stats");
              const ratingFloor = +(el.innerText.match(/(\d)\./) || {"0": 0})[0];
              el.innerText = ratingFloor < 4 ? "TRASH" : el.innerText.replace(/\d\.*/, "").trim().replace(/(\d)/, "$1/10");
              const score = el.innerText[0];
              let color;
              if(score <= 3 || ratingFloor < 4) {
                  color = "red";
              }
              else if(score <= 6) {
                  color = "orange";
              }
              else {
                  color = "green";
              }
              el.style.color = color;
              el.style.fontSize = '1.2rem';
	});

    document.querySelectorAll("[data-purpose=star-rating-shell]").forEach(starRatingContainer => {
        starRatingContainer.style.display = "none";
    });
}

function main() {
	document.body.insertAdjacentHTML("afterbegin", `
        <button onClick="applyHigherStandards()">Apply Higher Standards (4+ Stars Only, X/10)</button>
    `);
}

main();