Highlights correct answers with a green background on Study.com quizes and exams
// ==UserScript==
// @name Study.com Quiz Answers
// @namespace https://greatest.deepsurf.us/en/users/668659-denvercoder1
// @match *://*.study.com/*
// @include https://study.com/*
// @grant none
// @version 1.3
// @author Jonah Lawrence
// @license MIT
// @description Highlights correct answers with a green background on Study.com quizes and exams
// ==/UserScript==
/* jshint esversion: 6 */
(function () {
const interval = setInterval(function () {
// add styling for highlighting correct answers
// quiz answers will at this point already be highlighted since they have this attribute
const styles = '[data-correct="true"] { background: #c5ff81; box-shadow: 0 0 0 14px #c5ff81; border-radius: 2px; }';
document.getElementsByTagName("head")[0].insertAdjacentHTML("beforeend", `<style>${styles}</style>`);
// get exam container
const container = document.querySelector("#practice-exam-container");
// check if the element exists (only on exam pages)
if (!container) {
// disable interval and exit function since this is not an exam
return clearInterval(interval);
}
// if this is an exam, get the Controller
const controller = angular.element(container).controller();
// wait for the controller to be loaded
if (controller) {
// get the questions list
const questions = controller.questionByQuestionInstanceId;
// highlight the correct answer to each question
Object.values(questions).forEach(function (x) {
const correctAnswer = document.querySelector(`li[ng-class*="${x.correctQuizQuestionOptionId}"]`);
// check that element for the correct answer exists on the page
if (correctAnswer) {
// mark answer as correct so it can be highlighted
correctAnswer.dataset.correct = true;
// no need to keep checking
clearInterval(interval);
}
});
}
}, 500);
})();