html:css
`<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>轮播</title>
<style type="text/css">
* {
margin: 0;
padding: 0;
}
#container {
position: relative;
left: 0;
top: 0;
width: 430px;
height: 430px;
overflow: hidden;
}
#wrap {
position: absolute;
left: 0;
top: 0;
width: 1720px;
height: 430px;
overflow: hidden;
}
#wrap img {
float: left;
}
#nav {
width: 150px;
height: 30px;
list-style: none;
position: absolute;
bottom: 40px;
left: 0;
right: 0;
margin: auto;
}
#nav>li {
width: 30px;
height: 30px;
border-radius: 30px;
background-color: rgba(255, 255, 255, 0.6);
float: left;
margin-left: 10px;
cursor: pointer;
}
#nav>li:first-child {
margin-left: 0;
}
#nav>li.selected {
background-color: green;
}
</style>
</head>
<body>
<div id="container">
<div id="wrap">
<img src="./images/imgA_2.jpg">
<img src="./images/imgB_2.jpg">
<img src="./images/imgC_2.jpg">
<img src="./images/imgD_2.jpg">
</div>
<ul id="nav">
<li class="selected"></li>
<li></li>
<li></li>
<li></li>
</ul>
</div>
<script src="./js/jquery-1.12.4.js"></script>
<script src="./js/轮播.js"></script>
</body>
</html>
`
js:html
`$(function() {
$('#wrap').data('index', 0);
$('#nav').on('click', 'li', function() {
// 清除自动播放的定时器
clearInterval(timer);
var that = this;
var index = $(this).index();
// 把当前要显示的图片的索引号，保存到附加数据中
$('#wrap').data('index', index).animate({
left: index * (-430)
}, 600, function() {
$('#nav li').removeClass('selected');
$(that).addClass('selected');
// 重启自动播放的定时器
timer = setInterval(autoPlay, 2000);
});
});
var timer = setInterval(autoPlay, 2000);
function autoPlay() {
// console.log(123);
// 获取当前的index
var currentIndex = $('#wrap').data('index');
// 下一张的index
var nextIndex;
if(currentIndex === $('#wrap img').length - 1) {
nextIndex = 0;
} else {
nextIndex = currentIndex + 1;
}
// console.log(nextIndex);
$('#wrap').data('index', nextIndex).animate({
left: nextIndex * (-430)
}, 600, function() {
$('#nav li').removeClass('selected').eq(nextIndex).addClass('selected');
});
}
});
`
`<script id="template" type="text/x-handlebars-template">
<h1>Hello</h1>
<h2>Handlebars</h2>
<table border="1">
<thead>
<tr>
<th>姓名</th>
<th>年龄</th>
<th>性别</th>
</tr>
</thead>
<tbody>
<tr>
<td>{{name}}</td>
<td>{{age}}</td>
<td>{{gender}}</td>
</tr>
</tbody>
</table>
<p>hello, {{name}}</p>
<p>{{hello}}</p>
<table border="1">
<thead>
<tr>
<th>姓名</th>
<th>年龄</th>
<th>性别</th>
</tr>
</thead>
<tbody>
{{#each listOfStudents}}
<tr>
<td>{{name}}</td>
<td>{{age}}</td>
<td>{{gender}}</td>
</tr>
{{/each}}
</tbody>
</table>
<p>hello, {{{person.a.name}}}</p>
<p>hello, {{person/a/name}}</p>
<div class="big">
<div class="small">
2
</div>
</div>
<div class="big">
<div class="small">
3
</div>
</div>
<div class="big">
<div class="small">
4
</div>
</div>
{{circle name}}
{{circle name}}
{{circle name}}
</script>
<script src="./js/handlebars-v4.0.5.js"></script>
<script>
// 获取模板的源代码
var source = document.getElementById('template').innerHTML;
// 把模板的源代码，编译成模板对象
var template = Handlebars.compile(source);
// 建立helper
Handlebars.registerHelper('circle', function(data) {
// return '<div class="big"><div class="small">' + data + '</div></div>';
// 告诉系统，这个返回值要解析成真正的标签
var obj = new Handlebars.SafeString('<div class="big"><div class="small">' + data + '</div></div>');
return obj;
});
// 经过模板对象，获取最终html代码
var html = template({
person: {
a: {
name: 'Tom<input type="text">'
},
b: 'hello'
},
name: 'Bob',
age: 20,
gender: 'male',
test: 'hello',
listOfStudents: [
{
name: 'bob',
age: 20,
gender: 'male'
},
{
name: 'tom',
age: 22,
gender: 'male'
},
{
name: 'Hellen',
age: 20,
gender: 'female'
},
]
});
// console.log(html);
// 把html代码插入到网页中去
document.getElementById('container').innerHTML = html;
// helper
</script>`