不要setStatusClass()在所有按鈕上調(diào)用，只需在selectedButton.
const startButton = document.getElementById('start-btn')
const nextButton = document.getElementById('next-btn')
const questionContainerElement = document.getElementById('question-container')
const questionElement = document.getElementById('question')
const image1 = document.getElementById('image1')
const answerButtonsElement = document.getElementById('answer-buttons')
const startwords = document.getElementById('startmsg')
const endbutton = document.getElementById('end-btn')
const trybutton = document.getElementById('try-btn')
const score = document.getElementById('score')
let shuffledQuestions, currentQuestionIndex
startButton.addEventListener('click', startGame)
nextButton.addEventListener('click', () => {
currentQuestionIndex++
setNextQuestion()
})
endbutton.addEventListener('click', () => {
window.top.close()
})
trybutton.addEventListener('click', setNextQuestion)
function startGame() {
startButton.classList.add('hide')
startwords.classList.add('hide')
shuffledQuestions = questions.slice()
questionContainerElement.classList.remove('hide')
currentQuestionIndex = 0
setNextQuestion()
}
function setNextQuestion() {
resetState()
showQuestion(shuffledQuestions[currentQuestionIndex])
}
function showQuestion(question) {
questionElement.innerText = question.question
question.answers.forEach(answer => {
const button = document.createElement('button')
button.innerText = answer.text
button.classList.add('btn')
if (answer.correct) {
button.dataset.correct = answer.correct
}
button.addEventListener('click', selectAnswer)
answerButtonsElement.appendChild(button)
})
}
function resetState() {
clearStatusClass(document.body)
nextButton.classList.add('hide')
while (answerButtonsElement.firstChild) {
answerButtonsElement.removeChild(answerButtonsElement.firstChild)
}
trybutton.classList.add('hide')
}
function selectAnswer(e) {
const selectedButton = e.target
const correct = selectedButton.dataset.correct
setStatusClass(document.body, correct)
setStatusClass(selectedButton, correct);
if(correct){
if (shuffledQuestions.length > currentQuestionIndex + 1) {
nextButton.classList.remove('hide')
} else {
endbutton.classList.remove('hide')
}
} else{
trybutton.classList.remove('hide')
}
}
function setStatusClass(element, correct) {
clearStatusClass(element)
if (correct) {
element.classList.add('correct')
}
else {
element.classList.add('wrong')
}
}
function clearStatusClass(element) {
element.classList.remove('correct')
element.classList.remove('wrong')
}
const questions = [
{
question: 'What is 1+2?',
answers: [
{ text: '3', correct: true },
{ text: '4', correct: false },
{ text: '5', correct: false },
{ text: '6', correct: false }
]
},
{
question: 'What is 2-2?',
answers: [
{ text: '0', correct: true },
{ text: '4', correct: false },
{ text: '5', correct: false },
{ text: '7', correct: false },
]
},
]
*, *::before, *::after {
box-sizing: border-box;
font-family: cursive,
'Times New Roman', Times, serif
}
#particles-js {
position: absolute;
width: 100%;
height: 100%;
background-repeat: no-repeat;
background-size: cover;
background-position: 50% 50%;
z-index: 1;
}
:root {
--hue-neutral: 200;
--hue-wrong: 0;
--hue-correct: 145;
}
body {
--hue: var(--hue-neutral);
padding: 0;
margin: 0;
display: flex;
width: 100vw;
height: 100vh;
justify-content: center;
align-items: center;
background-color: hsl(var(--hue), 100%, 20%);
}
body.correct {
--hue: var(--hue-correct);
}
body.wrong {
--hue: 0;
}
.container {
width: 800px;
max-width: 80%;
background-color: white;
border-radius: 5px;
padding: 10px;
box-shadow: 0 0 10px 2px;
z-index: 2;
}
.btn-grid {
display: grid;
grid-template-columns: repeat(2, auto);
gap: 10px;
margin: 20px 0;
}
.btn {
--hue: var(--hue-neutral);
border: 1px solid hsl(var(--hue), 100%, 30%);
background-color: hsl(var(--hue), 100%, 50%);
border-radius: 5px;
padding: 5px 10px;
color: white;
outline: none;
}
.btn:hover {
border-color: black;
}
.btn.correct {
--hue: var(--hue-correct);
color: black;
}
.btn.wrong {
--hue: var(--hue-wrong);
}
.next-btn {
font-size: 1.5rem;
font-weight: bold;
padding: 10px 20px;
align-items: flex-end;
--hue: 245;
}
.start-btn {
font-size: 1.5rem;
font-weight: bold;
padding: 10px 20px;
--hue: 245;
}
.end-btn {
font-size: 1.5rem;
font-weight: bold;
padding: 10px 20px;
--hue: 245;
}
.try-btn {
font-size: 1.5rem;
font-weight: bold;
padding: 10px 20px;
--hue: 245;
}
.container1 {
display: flex;
justify-content: center;
align-items: center;
font-family: Arial;
font-size: xx-large;
padding: 10px 10px;
}
.container2 {
width: 800px;
max-width: 80%;
background-color: white;
border-radius: 5px;
padding: 10px;
box-shadow: 0 0 10px 2px;
top:37%;
position:absolute;
display: flex;
}
.controls {
display: flex;
justify-content: center;
align-items: center;
}
.hide {
display: none;
}
.wrapper {
position: absolute;
top: 0px;
right: 0px;
}
<!DOCTYPE html>
<html>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="styles.css">
<script defer src="script.js"></script>
<title>Quiz App</title>
</head>
<body>
</div>
<div class="container">
<div id="question-container" class="hide">
<div id="question">Question</div>
<div id="answer-buttons" class="btn-grid">
<button class="btn">Answer 1</button>
<button class="btn">Answer 2</button>
<button class="btn">Answer 3</button>
<button class="btn">Answer 4</button>
</div>
</div>
<div class="container1">
<div id="startmsgcontainer" class="hide"></div>
<div id="startmsg">Adventure Into The Human Immune System</div>
</div>
<div class="controls">
<button id="start-btn" class="start-btn btn">Start!</button>
<button id="next-btn" class="next-btn btn hide">Next</button>
<button id="end-btn" class="end-btn btn hide">End (this will close the current tab)</button>
<button id="try-btn" class="try-btn btn hide">Try again!</button>
</div>
</div>
<div class="wrapper">
<img src="img/uni.png" alt="image">
</div>
<div class="hide">
<div id="imgcontainer">hello</div>
<div id="image1" class="hide">
<img src="img/wantedvirus.png" alt="image1">
</div>
</div>
</div>
<div id="particles-js"></div>
<script src="particles.js"></script>
<script src="app.js"></script>
</body>
</html>
