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Quizlet Test Lag Remover

Remove lag-causing test logic in Quizlet test

  1. // ==UserScript==
  2. // @name         Quizlet Test Lag Remover
  3. // @version      1.0
  4. // @author       refracta
  5. // @description  Remove lag-causing test logic in Quizlet test
  6. // @match        https://quizlet.com/*
  7. // @icon         https://www.google.com/s2/favicons?sz=64&domain=quizlet.com
  8. // @license      MIT
  9. // @run-at document-end
  10. // @namespace https://greasyfork.org/users/467840
  11. // ==/UserScript==
  12. (async function () {
  13.     'use strict';
  14.     function waitFor(checkFunction, checkDelay = 100) {
  15.         return new Promise(resolve => {
  16.             let i = setInterval(_ => {
  17.                 try {
  18.                     let check = checkFunction();
  19.                     check ? clearInterval(i) || resolve(check) : void 0
  20.                 } catch (e) {}
  21.             }, checkDelay);
  22.         });
  23.     }
  24.     if (location.pathname.endsWith('/test')) {
  25.         await waitFor(_ => document.querySelector('div[role="dialog"]'));
  26.         await waitFor(_ => document.querySelector('div[role="dialog"]') === null);
  27.         let listInputs = Array.from(await waitFor(_ => document.querySelectorAll('.AssemblyInput input')));
  28.         let clones = [];
  29.         for (let i = 0; i < listInputs.length; i++) {
  30.             let e = listInputs[i];
  31.             const index = i;
  32.             let clone = e.cloneNode(true);
  33.             clone.addEventListener('keydown', function (e) {
  34.                 if (e.code === 'Enter') {
  35.                     setTimeout(_ => {
  36.                         clones[index + 1].focus();
  37.                     }, 325);
  38.                 }
  39.             });
  40.             clones.push(clone);
  41.             e.parentNode.replaceChild(clone, e);
  42.         }
  43.  
  44.         let submit = document.querySelector('#testCTA');
  45.         let submitClone = submit.cloneNode(true);
  46.         submit.parentNode.replaceChild(submitClone, submit);
  47.         submitClone.addEventListener('click', function (e) {
  48.             function setValue(element, value) {
  49.                 let setter = Object.getOwnPropertyDescriptor(HTMLInputElement.prototype, "value").set;
  50.                 setter.call(element, value);
  51.                 let event = new Event('input', {
  52.                     bubbles: true
  53.                 });
  54.                 element.dispatchEvent(event);
  55.             }
  56.  
  57.             for (let i = 0; i < clones.length; i++) {
  58.                 clones[i].parentNode.replaceChild(listInputs[i], clones[i]);
  59.                 setValue(listInputs[i], clones[i].value);
  60.             }
  61.             submitClone.parentNode.replaceChild(submit, submitClone);
  62.             submit.click();
  63.         });
  64.     }
  65. })();