I've created a simple js quiz app. But I want to show a certain number questions per quiz session from all questions. For example, I will add 20 questions in my question array. But in all session, it will show any 10 results only randonmy from all questions. How can I do it ?
Here's my code snippet:
var total_seconds = 1220 * 1;
var c_minutes = parseInt(total_seconds / 60);
var c_seconds = parseInt(total_seconds % 60);
var timer;
function CheckTime() {
document.getElementById("quiz-time-left1").innerHTML = '<i class="fa fa-clock-o"></i> ' +c_minutes +'m'+':'+ c_seconds+'s' ;
if (total_seconds <= 0) {
score();
} else {
total_seconds = total_seconds - 1;
c_minutes = parseInt(total_seconds / 60);
c_seconds = parseInt(total_seconds % 60);
timer = setTimeout(CheckTime, 1000);
}
}
timer = setTimeout(CheckTime, 1000);
const quizData = [{
question: "Which language runs in a web browser?",
a: "Java",
b: "C",
c: "Python",
d: "JavaScript",
correct: "d",
}, {
question: "What does CSS stand for?",
a: "Central Style Sheets",
b: "Cascading Style Sheets",
c: "Cascading Simple Sheets",
d: "Cars SUVs Sailboats",
correct: "b",
}, {
question: "What does HTML stand for?",
a: "Hypertext Markup Language",
b: "Hypertext Markdown Language",
c: "Hyperloop Machine Language",
d: "Helicopters Terminals Motorboats Lamborginis",
correct: "a",
}, {
question: "What year was JavaScript launched?",
a: "1996",
b: "1995",
c: "1994",
d: "none of the above",
correct: "b",
}, ];
const quiz = document.getElementById("quiz");
const answerElements = document.querySelectorAll(".answer");
const questionElement = document.getElementById("question");
const a_text = document.getElementById("a_text");
const b_text = document.getElementById("b_text");
const c_text = document.getElementById("c_text");
const d_text = document.getElementById("d_text");
const submitButton = document.getElementById("submit");
let currentQuiz = 0;
let score = 0;
const deselectAnswers = () => {
answerElements.forEach((answer) => (answer.checked = false));
};
const getSelected = () => {
let answer;
answerElements.forEach((answerElement) => {
if (answerElement.checked) answer = answerElement.id;
});
return answer;
};
const loadQuiz = () => {
deselectAnswers();
const currentQuizData = quizData[currentQuiz];
questionElement.innerText = currentQuizData.question;
a_text.innerText = currentQuizData.a;
b_text.innerText = currentQuizData.b;
c_text.innerText = currentQuizData.c;
d_text.innerText = currentQuizData.d;
};
loadQuiz();
submitButton.addEventListener("click", () => {
const answer = getSelected();
if (answer) {
if (answer === quizData[currentQuiz].correct) score++;
currentQuiz++;
let asd = quizData.length - score;
let ssrate = (1220 - Math.floor(total_seconds));
let ggg = "";
if (ssrate < 12)
ggg = "good morning";
else if (ssrate < 16)
ggg = "ghfgdfgh ning";
else if (ssrate < 24)
ggg = "asaasasasa ng";
let avg = Math.round( score * 100 / quizData.length);
document.getElementById("myProgress").value = avg ;
if (currentQuiz < quizData.length) loadQuiz();
else {
// stop timer
clearInterval(timer);
quiz.innerHTML = "<h2>Total Question : " + quizData.length + "<br>" + "Correct Ans : " + score + " <br> Wrong Ans : " + asd + " <br> Average : " + avg + " % <br> Time Usage : " + ssrate + " Seconds <br> Average : " + ggg + " % <br><br> <br><br> <button onclick='location.reload()'>Play Again</button></h2>"
}
}
});* {
box-sizing: border-box;
}
body {
background-color: #b8c6db;
background-image: linear-gradient(315deg, #b8c6db 0%, #f5f7fa 100%);
font-family: "Poppins", sans-serif;
display: flex;
align-items: center;
justify-content: center;
height: 100vh;
overflow: hidden;
margin: 0;
}
.quiz-container {
background-color: #fff;
border-radius: 10px;
box-shadow: 0 0 10px 2px rgba(100, 100, 100, 0.1);
width: 600px;
max-width: 95vw;
overflow: hidden;
}
.quiz-header {
padding: 4rem;
}
h2 {
padding: 1rem;
text-align: center;
margin: 0;
}
ul {
list-style-type: none;
padding: 0;
}
ul li {
font-size: 1.2rem;
margin: 1rem 0;
}
ul li label {
cursor: pointer;
}
button {
background-color: #8e44ad;
color: #fff;
border: none;
display: block;
width: 100%;
cursor: pointer;
font-size: 1.1rem;
font-family: inherit;
padding: 1.3rem;
}
button:hover {
background-color: #732d91;
}
button:focus {
outline: none;
background-color: #5e3370;
}<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.14.0/css/all.min.css"/>
<div id="quiz-time-left1" ></div>
<div class="quiz-container" id="quiz">
<div class="quiz-header">
<h2 id="question">Question is loading...</h2>
<ul>
<li> <input type="radio" name="answer" id="a" class="answer" /> <label for="a" id="a_text">Answer...</label> </li>
<li> <input type="radio" name="answer" id="b" class="answer" /> <label for="b" id="b_text">Answer...</label> </li>
<li> <input type="radio" name="answer" id="c" class="answer" /> <label for="c" id="c_text">Answer...</label> </li>
<li> <input type="radio" name="answer" id="d" class="answer" /> <label for="d" id="d_text">Answer...</label> </li>
</ul>
</div> <button id="submit">Submit</button>
</div>
<progress id='myProgress' value='' max='100'>Look at this one: This is my quiz code where is almost 4 questions. But when I run or play this code, it show all questions. But I want to show only any 2 questions randomly among all. How can I do it ?
