我正在创建一个简单的测验，想知道如何一次显示一个问题但只使用JavaScript。我不知道jQuery。基本上，我希望自动显示第一个问题。
以下是我的HTML的示例：
<div id="q0">
<li>
<h3>1. The color of the sky is... </h3>
<input type="radio" name="question0" value="A">Green<br>
<input type="radio" name="question0" value="B">Blue<br>
<input type="radio" name="question0" value="C">Red<br>
<input type="radio" name="question0" value="D">Purple<br>
</li>
</div>
<div id="q1" style="visibility:hidden">
<li>
<h3>2. Paper comes from... </h3>
<input type="radio" name="question1" value="A">Water<br>
<input type="radio" name="question1" value="B">Cement<br>
<input type="radio" name="question1" value="C">Trees<br>
<input type="radio" name="question1" value="D">The Sky<br>
</li>
</div>
<div id="q2" style="visibility:hidden">
<li>
<h3>3. How many hours in a day? </h3>
<input type="radio" name="question2" value="A">24<br>
<input type="radio" name="question2" value="B">22<br>
<input type="radio" name="question2" value="C">16<br>
<input type="radio" name="question2" value="D">48<br>
</li>
</div>
我目前没有显示下一个div并隐藏前一个div的脚本，因为我不知道如何开始。
我希望把它放到这种形式......
function nextQ(){
// code
}
...并且可以通过此按钮调用它：
<button onclick="next()">Next Question</button>
我是HTML和JavaScript的新手，非常感谢您的帮助。
感谢。
答案 0 :(得分：4)
Pure JavaScript版本（config）：
var showing = [1, 0, 0];
var questions = ['q0', 'q1', 'q2'];
function next() {
var qElems = [];
for (var i = 0; i < questions.length; i++) {
qElems.push(document.getElementById(questions[i]));
}
for (var i = 0; i < showing.length; i++) {
if (showing[i] == 1) {
qElems[i].style.display = 'none';
showing[i] = 0;
if (i == showing.length - 1) {
qElems[0].style.display = 'block';
showing[0] = 1;
} else {
qElems[i + 1].style.display = 'block';
showing[i + 1] = 1;
}
break;
}
}
}<div id="questions">
<div id="q0">
<h3>1. The color of the sky is... </h3>
<input type="radio" name="question0" value="A">Green<br>
<input type="radio" name="question0" value="B">Blue<br>
<input type="radio" name="question0" value="C">Red<br>
<input type="radio" name="question0" value="D">Purple<br>
</div>
<div id="q1" style="display: none">
<h3>2. Paper comes from... </h3>
<input type="radio" name="question1" value="A">Water<br>
<input type="radio" name="question1" value="B">Cement<br>
<input type="radio" name="question1" value="C">Trees<br>
<input type="radio" name="question1" value="D">The Sky<br>
</div>
<div id="q2" style="display: none">
<h3>3. How many hours in a day? </h3>
<input type="radio" name="question2" value="A">24<br>
<input type="radio" name="question2" value="B">22<br>
<input type="radio" name="question2" value="C">16<br>
<input type="radio" name="question2" value="D">48<br>
</div>
</div>
<button onclick="next()">Next Question</button>
纯JavaScript版本（无配置）：
function next() {
var qElems = document.querySelectorAll('#questions>div');
for (var i = 0; i < qElems.length; i++) {
if (qElems[i].style.display != 'none') {
qElems[i].style.display = 'none';
if (i == qElems.length - 1) {
qElems[0].style.display = 'block';
} else {
qElems[i + 1].style.display = 'block';
}
break;
}
}
}<div id="questions">
<div id="q0">
<h3>1. The color of the sky is... </h3>
<input type="radio" name="question0" value="A">Green<br>
<input type="radio" name="question0" value="B">Blue<br>
<input type="radio" name="question0" value="C">Red<br>
<input type="radio" name="question0" value="D">Purple<br>
</div>
<div id="q1" style="display: none;">
<h3>2. Paper comes from... </h3>
<input type="radio" name="question1" value="A">Water<br>
<input type="radio" name="question1" value="B">Cement<br>
<input type="radio" name="question1" value="C">Trees<br>
<input type="radio" name="question1" value="D">The Sky<br>
</div>
<div id="q2" style="display: none;">
<h3>3. How many hours in a day? </h3>
<input type="radio" name="question2" value="A">24<br>
<input type="radio" name="question2" value="B">22<br>
<input type="radio" name="question2" value="C">16<br>
<input type="radio" name="question2" value="D">48<br>
</div>
</div>
<button onclick="next()">Next Question</button>
jQuery版本：
$(function() {
$('.next').on('click', function() {
$('#questions>div').each(function() {
var id = $(this).index();
if ($(this).is(':visible')) {
$(this).hide();
if (id == $('#questions>div').length - 1) {
$('#questions>div').eq(0).show();
} else {
$('#questions>div').eq(id + 1).show();
}
return false;
}
});
});
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="questions">
<div id="q0">
<h3>1. The color of the sky is... </h3>
<input type="radio" name="question0" value="A">Green<br>
<input type="radio" name="question0" value="B">Blue<br>
<input type="radio" name="question0" value="C">Red<br>
<input type="radio" name="question0" value="D">Purple<br>
</div>
<div id="q1" style="display: none">
<h3>2. Paper comes from... </h3>
<input type="radio" name="question1" value="A">Water<br>
<input type="radio" name="question1" value="B">Cement<br>
<input type="radio" name="question1" value="C">Trees<br>
<input type="radio" name="question1" value="D">The Sky<br>
</div>
<div id="q2" style="display: none">
<h3>3. How many hours in a day? </h3>
<input type="radio" name="question2" value="A">24<br>
<input type="radio" name="question2" value="B">22<br>
<input type="radio" name="question2" value="C">16<br>
<input type="radio" name="question2" value="D">48<br>
</div>
</div>
<button class="next">Next Question</button>
答案 1 :(得分：2)
虽然我同意@Bitwise关于在javascript上使用jQuery来确保跨浏览器兼容性。但是既然你坚持使用javascript，这就是你应该做的。
1）确保您的<li>首先包含在容器标记中（例如，<ul>），这样您只能遍历所需的列表。
2）使用display:none属性而不是visibility:hidden。 visibility:hidden只是隐藏一个元素，但它仍然会占用与以前相同的空间。 display:none隐藏了一个元素，它不会占用任何空间。
这是更新的代码。
<强> HTML：
<ul id="listContainer">
<div id="q0">
<li style="display:list-item">
<h3>1. The color of the sky is... </h3>
<input type="radio" name="question0" value="A"/>Green<br/>
<input type="radio" name="question0" value="B"/>Blue<br/>
<input type="radio" name="question0" value="C"/>Red<br/>
<input type="radio" name="question0" value="D"/>Purple<br/>
</li>
</div>
<div id="q1" >
<li style="display:none">
<h3>2. Paper comes from... </h3>
<input type="radio" name="question1" value="A"/>Water<br/>
<input type="radio" name="question1" value="B"/>Cement<br/>
<input type="radio" name="question1" value="C"/>Trees<br/>
<input type="radio" name="question1" value="D"/>The Sky<br/>
</li>
</div>
<div id="q2" >
<li style="display:none">
<h3>3. How many hours in a day? </h3>
<input type="radio" name="question2" value="A"/>24<br/>
<input type="radio" name="question2" value="B"/>22<br/>
<input type="radio" name="question2" value="C"/>16<br/>
<input type="radio" name="question2" value="D"/>48<br/>
</li>
</div>
</ul>
<button id="next">next</button>
<强>使用Javascript：
document.getElementById('next').addEventListener("click",function(){
var listContainer = document.getElementById("listContainer");
var listItem = listContainer.getElementsByTagName("li");
for (var i=0; i < listItem.length-1; i++)
{
if(listItem[i].style.display == "list-item")
{
listItem[i].style.display = "none";
listItem[i+1].style.display = "list-item";
break;
}
}
});
这是fiddle。
干杯！
答案 2 :(得分：1)
我会稍微扭曲代码。将问题类添加到每个作为问题的div中，即.question {display：none}。将活动类添加到第一个问题（即.active {display：block}，它显示第一个问题。查找带有问题类的所有div并将它们添加到变量中，按下每个下一个按钮，从当前问题中删除活动类添加活动使用类的问题使用类的问题使用Javascript的classList.add和classList.remove转到下一个div，直到达到最后一个问题.Count保留当前问题的编号。 我已经在codepen http://codepen.io/dwanirdesh/pen/EaQOPg
中完成了它或直接从下面编码：
<div id="q0" class="question active">
<li>
<h3>1. The color of the sky is... </h3>
<input type="radio" name="question0" value="A">Green<br>
<input type="radio" name="question0" value="B">Blue<br>
<input type="radio" name="question0" value="C">Red<br>
<input type="radio" name="question0" value="D">Purple<br>
</li>
</div>
<div id="q1" class="question" >
<li>
<h3>2. Paper comes from... </h3>
<input type="radio" name="question1" value="A">Water<br>
<input type="radio" name="question1" value="B">Cement<br>
<input type="radio" name="question1" value="C">Trees<br>
<input type="radio" name="question1" value="D">The Sky<br>
</li>
</div>
<div id="q2" class="question">
<li>
<h3>3. How many hours in a day? </h3>
<input type="radio" name="question2" value="A">24<br>
<input type="radio" name="question2" value="B">22<br>
<input type="radio" name="question2" value="C">16<br>
<input type="radio" name="question2" value="D">48<br>
</li>
</div>
<button onclick="next()">Next Question</button>
## CSS ##
.question{
display:none
}
.active{
display:block
}
## JAVASCRIPT ##
var questionNumber=0;
var questions=document.querySelectorAll('.question');
function next(){
questionNumber++;
if(questions.length>questionNumber)
{
document.querySelector('.active').classList.remove('active');
questions[questionNumber].classList.add('active');
}
}
答案 3 :(得分：0)
这是java脚本函数代码。为此，您需要确保将div显示属性设置为或在html代码中。此外，您需要将按钮的ID命名为“next”，以便在到达最后一个按钮时隐藏它。
function nextQ(){
var blockFound = 0;
var lastQuestion = 0;
var divs = document.getElementsByTagName("div");
for(var i = 0; i < divs.length; i++){
if ( blockFound == 1){
blockFound = 0;
divs[i].style.display = 'block';
}else if ( divs[i].style.display == 'block' ){
if ( i + 2 == divs.length){
lastQuestion = 1;
}
blockFound = 1;
divs[i].style.display = 'none';
}
}
if ( lastQuestion == 1){
document.getElementById('next').style.visibility = 'hidden';
}
}
这里是Html代码。
<div id="q0" style="display:block">
<li>
<h3>1. The color of the sky is... </h3>
<input type="radio" name="question0" value="A">Green<br>
<input type="radio" name="question0" value="B">Blue<br>
<input type="radio" name="question0" value="C">Red<br>
<input type="radio" name="question0" value="D">Purple<br>
</li>
</div>
<div id="q1" style="display:none">
<li>
<h3>2. Paper comes from... </h3>
<input type="radio" name="question1" value="A">Water<br>
<input type="radio" name="question1" value="B">Cement<br>
<input type="radio" name="question1" value="C">Trees<br>
<input type="radio" name="question1" value="D">The Sky<br>
</li>
</div>
<div id="q2" style="display:none">
<li>
<h3>3. How many hours in a day? </h3>
<input type="radio" name="question2" value="A">24<br>
<input type="radio" name="question2" value="B">22<br>
<input type="radio" name="question2" value="C">16<br>
<input type="radio" name="question2" value="D">48<br>
</li>
</div>
<button id="next" onclick="nextQ()">Next Question</button>
答案 4 :(得分：-1)
这是你需要的吗？
<div id="q0">
<li>
<h3>1. The color of the sky is... </h3>
<input type="radio" name="question0" value="A">Green<br>
<input type="radio" name="question0" value="B">Blue<br>
<input type="radio" name="question0" value="C">Red<br>
<input type="radio" name="question0" value="D">Purple<br>
</li>
<button class="next" onclick="goNext(0)">Next Question</button>
</div>
<div id="q1" style="display:none">
<li>
<h3>2. Paper comes from... </h3>
<input type="radio" name="question1" value="A">Water<br>
<input type="radio" name="question1" value="B">Cement<br>
<input type="radio" name="question1" value="C">Trees<br>
<input type="radio" name="question1" value="D">The Sky<br>
</li>
<button class="next" onclick="goNext(1)">Next Question</button>
</div>
<div id="q2" style="display:none">
<li>
<h3>3. How many hours in a day? </h3>
<input type="radio" name="question2" value="A">24<br>
<input type="radio" name="question2" value="B">22<br>
<input type="radio" name="question2" value="C">16<br>
<input type="radio" name="question2" value="D">48<br>
</li>
<button class="next" onclick="goNext(2)">Next Question</button>
</div>
<script language=javascript>
function goNext(i)
{
document.getElementById("q"+i).style.display = 'none';
i++;
document.getElementById("q"+i).style.display = 'block';
}
</script>