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script.js
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script.js
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const questions = [
{
question: "Which country is the best?",
answers: [
{text: "India", correct: true},
{text: "USA", correct: false},
{text: "Canada", correct: false},
{text: "Japan", correct: false},
]
},
{
question: "What is the capital of France?",
answers: [
{text: "Rome", correct: false},
{text: "Madrid", correct: false},
{text: "Paris", correct: true},
{text: "Berlin", correct: false},
]
},
{
question: "Which planet is known as the Red Planet?",
answers: [
{text: "Earth", correct: false},
{text: "Mars", correct: true},
{text: "Venus", correct: false},
{text: "Jupiter", correct: false},
]
},
{
question: "What is the chemical symbol for water?",
answers: [
{text: "O2", correct: false},
{text: "H2O", correct: true},
{text: "CO2", correct: false},
{text: "HO", correct: false},
]
},
{
question: "Which animal is known as the king of the jungle?",
answers: [
{text: "Tiger", correct: false},
{text: "Elephant", correct: false},
{text: "Lion", correct: true},
{text: "Bear", 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 = "Retake";
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();