标签：eve url ons 切换 add push rip round google
本来我的实现是类似分页，每次上一题，下一题，都去请求一下服务器数据，根据题目序号显示到页面上，但是这样子效率太低下，
这里的demo代码，直接等于是把所有的题目都请求了出来，然后JavaScript控制切换题目了，其实这样子效率可能会更高一点的感觉，感觉是比较好的实现方式了。
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>测验表2</title>
<style type="text/css">
@import url(https://fonts.googleapis.com/css?family=Work+Sans:300,600);
body{
font-size: 20px;
font-family: ‘Work Sans‘, sans-serif;
color: #333;
font-weight: 300;
text-align: center;
background-color: #f8f6f0;
}
h1{
font-weight: 300;
margin: 0px;
padding: 10px;
font-size: 16px;
background-color: #444;
color: #fff;
}
.question{
font-size: 30px;
margin-bottom: 10px;
}
.answers {
margin-bottom: 20px;
text-align: left;
display: inline-block;
}
.answers label{
display: block;
margin-bottom: 10px;
}
button{
font-family: ‘Work Sans‘, sans-serif;
font-size: 16px;
background-color: #279;
color: #fff;
border: 0px;
border-radius: 3px;
padding: 10px;
cursor: pointer;
margin-bottom: 20px;
margin-top: 20px;
}
button:hover{
background-color: #38a;
}
.slide{
position: absolute;
left: 0px;
top: 0px;
width: 100%;
z-index: 1;
opacity: 0;
transition: opacity 0.5s;
}
.active-slide{
opacity: 1;
z-index: 2;
}
.quiz-container{
position: relative;
height: 200px;
margin-top: 40px;
}
</style>
</head>
<body>
<h1>测试表</h1>
<div class="quiz-container">
<div id="quiz"></div>
</div>
<button id="previous">前一题</button>
<button id="next">下一题</button>
<button id="submit">提交</button>
<div id="results"></div>
<script type="text/javascript">
(function() {
const myQuestions = [
{
question: "“大煮干丝”是哪个菜系的代表菜之一( )。",
answers: {
A: "四川菜系",
B: "山东菜系",
C: "广东菜系",
D: "淮扬菜系"
},
correctAnswer: "D"
},
{
question: "红茶属于( )茶。",
answers: {
A: "半发酵",
B: "发酵",
C: "不发酵",
D: "微发酵"
},
correctAnswer: "A"
},
{
question: "满汉全席起兴于（ ）。",
answers: {
A: "清代",
B: "唐代",
C: "宋代",
D: "两汉"
},
correctAnswer: "A"
}
];
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 = `你答对了${myQuestions.length}中的${numCorrect}`;
}
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);
})();
</script>
</body>
</html>
标签：eve url ons 切换 add push rip round google
原文地址：https://www.cnblogs.com/EarlyBridVic/p/12268092.html
