Study.com Quiz Answers

Highlights correct answers with a green background on Study.com quizzes and exams
As of 2021-04-07. See the latest version.
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Wrap lines
// ==UserScript==
// @name        Study.com Quiz Answers
// @namespace   Violentmonkey Scripts
// @match       *://*.study.com/*
// @include     https://study.com/*
// @grant       none
// @version     1.1.0
// @author      Jonah Lawrence
// @description Highlights correct answers with a green background on Study.com quizzes and exams
// ==/UserScript==
 
/* jshint esversion: 6 */
 
(function () {
    const interval = setInterval(function () {
        const container = document.querySelector("#practice-exam-container");
        // check if practice-exam-container element exists (only on exam pages)
        if (container) {
            const controller = angular.element(container).controller();
            if (controller) {
                // get questions
                const questions = controller.questionByQuestionInstanceId;
                // highlight the answer to each question
                Object.values(questions).forEach(function (x) {
                    const correctAnswer = document.querySelector(`li[ng-class*="${x.correctQuizQuestionOptionId}"]`);
                    if (correctAnswer) {
                        correctAnswer.style.background = "#c5ff81";
                        correctAnswer.style.borderRadius = "2px";
                        correctAnswer.style.boxShadow = "0 0 0 6px #c5ff81";
                        // no need to keep checking
                        clearInterval(interval);
                    }
                });
            }
        }
        else {
            // add styling for showing quiz answers
            const style = document.createElement('style');
            style.innerText = `
                            label[data-correct="true"] {
                                    background: #c5ff81;
                                    box-shadow: 0 0 0 14px #c5ff81;
                            }`;
            document.head.appendChild(style);
            // disable interval since this is not an exam
            clearInterval(interval);
        }
    }, 500);
})();