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script.js
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script.js
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const questions = [
{
question: "Which is largest animal in the world?",
answers: [
{ text: "Shark", correct: false},
{ text: "Blue Whale", correct: true},
{ text: "Elephant", correct: false},
{ text: "Giraffe", correct: false},
]
},
{
question: "Which is the smallest country in the world?",
answers: [
{ text: "Vatican City", correct: true},
{ text: "Bhutun", correct: false},
{ text: "Nepal", correct: false},
{ text: "Sri Lanka", correct: false},
]
},
{
question: "Which is largest desert in the world?",
answers: [
{ text: "Kalahari", correct: false},
{ text: "Gobi", correct: false},
{ text: "Sahara", correct: false},
{ text: "Antarctica", correct: true},
]
},
{
question: "Which is smallest continent in the world?",
answers: [
{ text: "Asia", correct: false},
{ text: "Australia", correct: true},
{ text: "Arctic", correct: false},
{ text: "Africa", correct: false},
]
}
];
const questionElement = document.getElementById("question");
const answerButtons = document.getElementById("answer-buttons");
const nextButton = document.getElementById("next-btn");
let currentQuestionIndex = 0;
let score = 0;
function startQuiz(){
currentQuestionIndex = 0;
score = 0;
nextButton.innerHTML = "Next";
showQuestion();
}
function showQuestion(){
resetState();
let currentQuestion = questions[currentQuestionIndex];
let questionNo = currentQuestionIndex +1;
questionElement.innerHTML = questionNo + ". " + currentQuestion.question;
currentQuestion.answers.forEach(answer => {
const button = document.createElement("button");
button.innerHTML = answer.text;
button.classList.add("btn");
answerButtons.appendChild(button);
if(answer.correct){
button.dataset.correct = answer.correct;
}
button.addEventListener("click", selectAnswer);
});
}
function resetState(){
nextButton.style.display ="none";
while(answerButtons.firstChild){
answerButtons.removeChild(answerButtons.firstChild);
}
}
function selectAnswer(e){
const selectedBtn = e.target;
const isCorrect = selectedBtn.dataset.correct === "true";
if(isCorrect){
selectedBtn.classList.add("correct");
score++;
}else{
selectedBtn.classList.add("incorrect");
}
Array.from(answerButtons.children).forEach(button => {
if(button.dataset.correct === "true"){
button.classList.add("correct");
}
button.disabled = true;
});
nextButton.style.display = "block";
}
function showScore(){
resetState();
questionElement.innerHTML = `You scored ${score} out of ${questions.length}!`;
nextButton.innerHTML = "Play Again";
nextButton.style.display = "block";
}
function handleNextButton(){
currentQuestionIndex++;
if(currentQuestionIndex < questions.length){
showQuestion();
}else{
showScore();
}
}
nextButton.addEventListener("click", ()=>{
if(currentQuestionIndex < questions.length){
handleNextButton();
}else{
startQuiz();
}
});
startQuiz();