So I'm making a site with questions that u need to answer and I want to use the questions in the same order. So how do I use the Math.random() function to randomize my questions, and I don't want to randomize the answers! Please help with this javascript code:
(function() {
const myQuestions = [{
question: "Esimerkki kysymys1",
answers: {
a: "Oikein",
b: "Väärin"
},
correctAnswer: "a"
},
{
question: "Esimerkki kysymys2",
answers: {
a: "Oikein",
b: "Väärin"
},
correctAnswer: "b"
},
{
question: "Esimerkki kysymys3",
answers: {
a: "Oikein",
b: "Väärin"
},
correctAnswer: "a"
}
];
function Random() {
var display = document.getElementById("myQuestions");
var questionAmount = 2;
for (var i = 0; i < questionAmount; i++) {
do {
var randomQuestion = Math.floor(Math.random() * questions.length);
} while (existingQuestions());
display.innerHTML += questions[randomQuestion] + '<br>';
questionTracker.push(randomQuestion);
}
function existingQuestions() {
for (var i = 0; i < questionTracker.length; i++) {
if (questionTracker[i] === randomQuestion) {
return true;
}
}
return false;
}
}
function buildQuiz() {
// we'll need a place to store the HTML output
const output = [];
// for each question...
myQuestions.forEach((currentQuestion, questionNumber) => {
// we'll want to store the list of answer choices
const answers = [];
// and for each available answer...
for (letter in currentQuestion.answers) {
// ...add an HTML radio button
answers.push(
`<label>
<input type="radio" name="question${questionNumber}" value="${letter}">
${letter} :
${currentQuestion.answers[letter]}
</label>`
);
}
// add this question and its answers to the output
output.push(
`<div class="slide">
<div class="question"> ${currentQuestion.question} </div>
<div class="answers"> ${answers.join("")} </div>
</div>`
);
});
// finally combine our output list into one string of HTML and put it on the page
quizContainer.innerHTML = output.join("");
}
function showResults() {
// gather answer containers from our quiz
const answerContainers = quizContainer.querySelectorAll(".answers");
// keep track of user's answers
let numCorrect = 0;
// for each question...
myQuestions.forEach((currentQuestion, questionNumber) => {
// find selected answer
const answerContainer = answerContainers[questionNumber];
const selector = `input[name=question${questionNumber}]:checked`;
const userAnswer = (answerContainer.querySelector(selector) || {}).value;
// if answer is correct
if (userAnswer === currentQuestion.correctAnswer) {
// add to the number of correct answers
numCorrect++;
// color the answers green
answerContainers[questionNumber].style.color = "lightgreen";
} else {
// if answer is wrong or blank
// color the answers red
answerContainers[questionNumber].style.color = "red";
}
});
// show number of correct answers out of total
resultsContainer.innerHTML = `${numCorrect} Oikein ${myQuestions.length}`;
}
function showSlide(n) {
slides[currentSlide].classList.remove("active-slide");
slides[n].classList.add("active-slide");
currentSlide = n;
if (currentSlide === 0) {
previousButton.style.display = "none";
} else {
previousButton.style.display = "inline-block";
}
if (currentSlide === slides.length - 1) {
nextButton.style.display = "none";
submitButton.style.display = "inline-block";
} else {
nextButton.style.display = "inline-block";
submitButton.style.display = "none";
}
}
function showNextSlide() {
showSlide(currentSlide + 1);
}
function showPreviousSlide() {
showSlide(currentSlide - 1);
}
const quizContainer = document.getElementById("quiz");
const resultsContainer = document.getElementById("results");
const submitButton = document.getElementById("submit");
// display quiz right away
buildQuiz();
const previousButton = document.getElementById("previous");
const nextButton = document.getElementById("next");
const slides = document.querySelectorAll(".slide");
let currentSlide = 0;
showSlide(0);
// on submit, show results
submitButton.addEventListener("click", showResults);
previousButton.addEventListener("click", showPreviousSlide);
nextButton.addEventListener("click", showNextSlide);
})();
I tried to use the Math.random function, but I could not get it to work!
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