参考：https://www.cnblogs.com/LIUYANZUO/p/5679753.html
html:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<title>js横向轮播</title>
<style type="text/css">
body {
margin: 0;
}
#container {
position: relative;
width: 100%;
height: 300px;
overflow: hidden;
z-index: -1;
}
#list {
position: absolute;
width: 4200px;
height: 300px;
}
#list .img {
float: left;
/* width: 375px; */
height: 300px;
}
</style>
</head>
<body>
<div id="container">
<div id="list"></div>
</div>
</body>
<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
<script type="text/javascript">
window.onload = function() {
var container = document.getElementById('container'),
list = document.getElementById('list'),
index = 1;
$('#list').css('left', -screen.width + 'px');
var timer;
var imgList = [{
src: 'img/1.jpg'
},
{
src: 'img/2.jpg'
},
{
src: 'img/3.jpg'
},
{
src: 'img/4.jpg'
},
{
src: 'img/5.jpg'
}
],
l = imgList.length - 1,
len = imgList.length,
w = screen.width,
string = '';
string = makeStr(imgList, l);
$('#list').append(string);
var j = 0;
while (j < imgList.length) {
string = makeStr(imgList, j);
$('#list').append(string);
j++;
}
string = makeStr(imgList, 0);
$('#list').append(string);
$('#list .img').css('width', screen.width + 'px');
function makeStr(arr, i) {
string = "<div class='img' style='background:url(" +
arr[i].src + ") no-repeat;background-size:100%'/></div>";
return string;
}
function animate(offset) {
var newLeft = parseInt(list.style.left) + offset;
list.style.left = newLeft + 'px';
if (newLeft > -w) {
list.style.left = w * len + 'px';
}
if (newLeft < -w * len) {
list.style.left = -w + 'px';
}
}
function play() {
timer = setInterval(function() {
start();
}, 2000)
}
function start() {
index += 1;
if (index > len) {
index = 1
}
animate(-w);
};
function stop() {
clearInterval(timer);
}
if (imgList.length > 1) {
play();
}
}
</script>
</html>
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