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index.js
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index.js
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const questions = [
{
question: "What does the abbreviation HTML stand for?",
answers: [
{ text: "HyperText Markup Language", correct: true},
{ text: "HighText Markup Language", correct: false},
{ text: "HyperText Markdown Language", correct: false},
{ text: "None of the above", correct: false},
]
},
{
question: "What is the smallest header in HTML by default?",
answers: [
{ text: "h1", correct: false},
{ text: "h2", correct: false},
{ text: "h6", correct: true},
{ text: "h4", correct: false},
]
},
{
question: "How to create an ordered list in HTML",
answers: [
{ text: "ul", correct: false},
{ text: "ol", correct: true},
{ text: "href", correct: false},
{ text: "b", correct: false},
]
},
{
question: "What are the attributes used to change the size of an image?",
answers: [
{ text: "Width and height", correct: true},
{ text: "Big and Small", correct: false},
{ text: "Top and Bottom", correct: false},
{ text: "None of the above", correct: false},
]
},
{
question: "Colors are defined in HTML using?",
answers: [
{ text: "RGB Values", correct: false},
{ text: "HEX Values", correct: false},
{ text: "RGBA Values", correct: false},
{ text: "All of the above", correct: true},
]
},
{
question: "What are the main components of the frontend of any working website?",
answers: [
{ text: "HTML,CSS,JavaScript", correct: true},
{ text: "HTML only", correct: false},
{ text: "JavaScript", correct: false},
{ text: "Node.js", correct: false},
]
},
{
question: "The Full Form of CSS is:",
answers: [
{ text: "Cascading Style Sheets", correct: true},
{ text: "Coloured Special Sheets", correct: false},
{ text: "Color and Style Sheets", correct: false},
{ text: "None of the above", correct: false},
]
},
{
question: "How can we change the background color of an element?",
answers: [
{ text: "Background-color", correct: true},
{ text: "Color", correct: false},
{ text: "Both A and B", correct: false},
{ text: "None of the above", correct: false},
]
},
{
question: "In how many ways can CSS be written in?",
answers: [
{ text: "1", correct: false},
{ text: "2", correct: false},
{ text: "4", correct: false},
{ text: "3", correct: true},
]
},
{
question: "The CSS property used to specify the transparency of an element is?",
answers: [
{ text: "Filter", correct: false},
{ text: "Visibility", correct: false},
{ text: "Opacity", correct: true},
{ text: "None of the above", 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(buttton => {
if(buttton.dataset.correct === "true"){
buttton.classList.add("correct");
}
buttton.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();