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Copy path轮播图2.html
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轮播图2.html
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<!DOCTYPE html>
<html lang="zh">
<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">
<title></title>
<style>
* {
margin: 0;
padding: 0;
text-decoration: none;
}
body {
padding: 20px;
}
#container {
width: 600px;
height: 400px;
border: 3px solid #333;
overflow: hidden;
position: relative;
}
#list {
width: 4200px;
height: 400px;
position: absolute;
z-index: 1;
}
#list > img {
float: left;
}
#buttons {
position: absolute;
left: 250px;
bottom: 20px;
height: 10px;
width: 100px;
z-index: 2;
}
#buttons span {
cursor: pointer;
float: left;
border: 1px solid #fff;
width: 10px;
height: 10px;
border-radius: 50%;
background-color: #333;
margin-right: 5px;
}
#buttons .on {
background-color: orangered;
}
.arrow {
display: none;
width: 40px;
height: 40px;
line-height: 39px;
text-align: center;
font-size: 36px;
font-weight: bold;
position: absolute;
z-index: 20;
top: 180px;
background-color: rgba(0, 0, 0, .3);
color: #fff;
}
.arrow:hover {
background-color: rgba(0, 0, 0, .7);
}
#container:hover .arrow {
display: block;
}
#prev {
left: 20px;
}
#next {
right: 20px;
}
</style>
</head>
<body>
<div id="container">
<div id="list" style="left: -600px;">
<img src="img/girl5.jpg" alt="">
<img src="img/girl1.jpg" alt="">
<img src="img/girl2.jpg" alt="">
<img src="img/girl3.jpg" alt="">
<img src="img/girl4.jpg" alt="">
<img src="img/girl5.jpg" alt="">
<img src="img/girl1.jpg" alt="">
</div>
<div id="buttons">
<span data-index="1" class="on"></span>
<span data-index="2" class=""></span>
<span data-index="3" class=""></span>
<span data-index="4" class=""></span>
<span data-index="5" class=""></span>
</div>
<a href="javascript:void(0);" id="prev" class="arrow"><</a>
<a href="javascript:void(0);" id="next" class="arrow">></a>
</div>
<script type="text/javascript">
const container = document.querySelector('#container');
const list = document.querySelector('#list');
const buttons = document.querySelector('#buttons').getElementsByTagName('span');
const prev = document.querySelector('#prev');
const next = document.querySelector('#next');
let index = 1; // 记录轮播图的位置数，第几张
let len = 5;
let animated = false; // 什么作用
let interval = 3000; //
let timer; //
function animate(offset) {
if (offset === 0) return;
animated = true; // 只要点击了下一张就变成true
let time = 200; //
let inteval = 10; // 300 / 10 === 30 把时间分成30份
let speed = offset / (time / inteval); // 总路径 / (总时间 / 间距)
let left = parseInt(list.style.left) + offset;
function go() {
if ((speed > 0 && parseInt(list.style.left) < left) || (speed < 0 && parseInt(list.style.left) > left)) {
list.style.left = parseInt(list.style.left) + speed + 'px';
setTimeout(go, inteval);
}
else {
list.style.left = left + 'px';
if (left > -200) {
list.style.left = -600 * len + 'px';
}
if (left < (-600 * len)) {
list.style.left = '-600px';
}
animated = false;
}
}
go();
}
function showButton() {
for (let i = 0; i < buttons.length; i++) {
// debugger;
console.log(i, buttons[i].className);
if (buttons[i].className === 'on') {
buttons[i].className = '';
break;
}
}
buttons[index - 1].className = 'on';
}
function play() {
timer = setTimeout(() => {
next.onclick();
}, interval);
}
function stop() {
clearTimeout(timer);
}
next.onclick = () => {
if (animated) return;
if (index === 5) {
index = 1;
}
else {
index += 1;
}
animate(-600);
showButton();
};
prev.onclick = () => {
if (animated) return;
if (index === 1) {
index = 5;
}
else {
index -= 1;
}
animate(600);
showButton();
};
for (let i = 0; i < buttons.length; i++) {
buttons[i].onclick = function() {
if (animated) return;
if (this.className === 'on') return;
let myIndex = parseInt(this.getAttribute('data-index'));
let offset = -600 * (myIndex - index);
animate(offset);
index = myIndex;
showButton();
};
}
container.onmouseover = stop;
container.onmouseout = play;
play();
</script>
</body>
</html>