Quiz

JavaScript Quiz. Question with 3 answers and total score.

HTML

<!-- in head -->

<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.1/dist/css/bootstrap-reboot.min.css">

<!-- in body -->

<div class="view">
  <div class="quiz">

	<div class="title">
		Test Personality
	</div>
	<hr>
	
	<div class="question-box">
	
		<div class="question-txt">
		</div>
		
		<label class="option">
			<input type="checkbox" name="option" value="1" onclick="selectOnlyThis(this)"/>
			<span class="option1"></span>
		</label>
		<label class="option">
			<input type="checkbox" name="option" value="2" onclick="selectOnlyThis(this)"/>
			<span class="option2"></span>
		</label>
		<label class="option">
			<input type="checkbox" name="option" value="3" onclick="selectOnlyThis(this)"/>
			<span class="option3"></span>
		</label>
		<div class="controls nav-box">
			<button type="button" class="previous">Vorige</button>
			<button type="button" class="next">Volgende</button>
		</div>
	</div>
	
	<div class="result-box">
		<div class="result-txt">
		</div>
		<div class="controls reset-box">
			<button type="button" class="restart">Opnieuw</button>
		</div>
	</div>
	
  </div><!--end quiz-->
</div><!--end view-->

CSS

html, body {
  height: 100%;
}
body {
  font-family: "Roboto", sans-serif;
  font-weight: 400;
}
.view {
  min-height: 100%;
  padding-top: 2rem;
  background: no-repeat linear-gradient(250deg, #ff934f, #db222a);
}
.quiz {
  width: 40%;
  margin: 0 auto;
  padding: 25px 40px 40px 40px;
  box-shadow: 1px 1px 1px 1px rgba(0, 0, 0, 0.2);
  text-shadow: 1px 1px white;
  text-shadow: 0 1px black;
  background: linear-gradient(360deg, gray, white);
  border-radius: 5px;
}
.quiz .title {
  margin-bottom: 20px;
  padding: 1rem;
  color: black;
  font-size: 2.5rem;
  text-align: left;
  background-color: gray;
  border-radius: 5px 5px 0 0;
}

/* question */

.quiz .question {
  margin: 10px 0;
  font-size: 1.5rem;
}

/* option */

.quiz .option {
  width: 100%;
  padding: 1rem;
  color: black;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 5px;
  transition: all 0.3s;
  font-size: 20px;
  cursor: pointer;
}
.quiz .option:hover {
  background: rgba(255, 255, 255, 0.4);
}
.quiz .option input {
    width: 20px;
    height: 20px;
    margin: -1px 4px 0 0;
    vertical-align: middle;
    background: url(check_radio_sheet.png) -38px top no-repeat;
    cursor: pointer;
}
.quiz .option input:checked + span {
  color: #c00;
}

/* buttons */

.quiz button {
  margin-right: 10px;
  padding: 5px 12px;
  border: 2px white solid;
  border-radius: 5px;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.1);
  font-weight: 400;
  background: #e14;
  color: white;
  outline: none;
  transform: scale(0.98);
  transition: all 0.2s;
}

.quiz .controls {
  margin: 1rem 0;
}

/* result */

.quiz .result {
  padding: 1rem 0 0.5rem 0;
  text-align: center;
  font-size: 1.5rem;
}
.quiz .result h1 {
  font-size: 2rem;
  color: 222;
}

/* result summary */

.quiz .summary {
  padding: 1rem;
  font-size: 1rem;
  text-shadow: 1px 1px #ffffff50;
  color: #222;
  background: rgba(255, 255, 255, 0.4);
  border-radius: 5px;
}

JavaScript

const questions = [
  {
	"question" : "Wat is jouw IQ?",
	"answer1"  : "under 18",
	"answer2"  : "18 - 30",
	"answer3"  : "over 30",
	"total1"   : 8,
	"total2"   : 10,
	"total3"   : 12,
  },
  {
	"question" :
	  "You make plans with a friend and they cancel on you, what do you do?",
	"answer1"  :
	  "Say \"whatever\" and plan a night that'll be GREAT so they don't cancel again.",
	"answer2"  : "Feel hurt because you were looking forward to tonight.",
	"answer3"  : "No problem, you kinda wanted to stay home anyway.",
	"total1"   : 5,
	"total2"   : 7,
	"total3"   : 9,
  },
  {
	"question" : "Which of the following colours do you like most?",
	"answer1"  : "Black",
	"answer2"  : "Yellow or light blue",
	"answer3"  : "Red or orange",
	"total1"   : 4,
	"total2"   : 6,
	"total3"   : 8,
  },
];

const questionBox = document.querySelector('.question-box');
const resultBox   = document.querySelector('.result-box');
const resultTxt   = document.querySelector('.result-txt');

const questionTxt = document.querySelector('.question-txt');
const option1     = document.querySelector('.option1');
const option2     = document.querySelector('.option2');
const option3     = document.querySelector('.option3');

const navBox      = document.querySelector('.nav-box');
const resetBox    = document.querySelector('.reset-box');

const nextButton  = document.querySelector('.next');
const prevButton  = document.querySelector('.previous');
const resetButton = document.querySelector('.restart');

const totalQuestions = questions.length;
let currentQuestion  = 0;

// array to remember 'input value' of each question
let arrAnswer = [];

// reset all to default
function resetAll () {
	questionBox.style.display = "block";
	resultBox.style.display   = "none";
	nextButton.textContent = 'Volgende';
	for (let i=0; i<totalQuestions; i++) {
		arrAnswer[i] = 0;
	}
}

// show question with 3 answers
function generateQuestions (index) {
	const qItem = questions[index];
	questionTxt.innerHTML = (index + 1)...