JS——轮播图简单版
1、小图标版本
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
* {
padding: 0;
margin: 0;
list-style: none;
} .scrollImg {
margin: 150px auto;
width: 500px;
height: 200px;
padding: 5px;
border: 1px solid #ccc;
} .scrollContent {
position: relative;
width: 500px;
height: 200px;
overflow: hidden;
} .scrollContent ul {
width: 500%;
position: absolute;
}
.scrollContent ul li{
float: left;
}
.scrollContent ol {
position: absolute;
right: 13px;
bottom: 8px; } .scrollContent ol li {
float: left;
width: 20px;
height: 20px;
font: 500 15px/20px "simsun";
text-align: center;
background-color: #fff;
margin-right: 10px;
cursor: pointer;
} .scrollContent ol li.current {
background-color: yellow;
}
</style>
</head>
<body>
<div class="scrollImg">
<div class="scrollContent" id="scrollContent">
<ul>
<li><img src="data:images/1.jpg"></li>
<li><img src="data:images/2.jpg"></li>
<li><img src="data:images/3.jpg"></li>
<li><img src="data:images/4.jpg"></li>
<li><img src="data:images/5.jpg"></li>
</ul>
<ol>
<li class="current">1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
</ol>
</div>
<script>
var scrollContent = document.getElementById("scrollContent");
var scrollUl = scrollContent.children[0];
var icon = scrollContent.children[1];
var iconLiArr = icon.children;
var imgWidth = scrollContent.offsetWidth;
//鼠标放在小图标上，对于图表点亮
for (var i = 0; i < iconLiArr.length; i++) {
iconLiArr[i].index = i;
iconLiArr[i].onmouseover = function () {
for (var j = 0; j < iconLiArr.length; j++) {
iconLiArr[j].className = "";
}
this.className = "current";
animate(scrollUl, -this.index * imgWidth);
}
} //图片移动
function animate(ele, target) {
clearInterval(ele.timer);
var speed = ele.offsetLeft < target ? 15 : -15;
ele.timer = setInterval(function () {
ele.style.left = ele.offsetLeft + speed + "px";
var value = ele.offsetLeft - target;
if (Math.abs(value) <= Math.abs(speed)) {
ele.style.left = target + "px";
clearInterval(ele.timer);
}
}, 10);
}
</script>
</div>
</body>
</html>
2、小图标版本附有定时器
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
* {
padding: 0;
margin: 0;
list-style: none;
} .scrollImg {
margin: 150px auto;
width: 500px;
height: 200px;
padding: 5px;
border: 1px solid #ccc;
} .scrollContent {
position: relative;
width: 500px;
height: 200px;
overflow: hidden;
} .scrollContent ul {
width: 600%;
position: absolute;
} .scrollContent ul li {
float: left;
} .scrollContent ol {
position: absolute;
right: 13px;
bottom: 8px; } .scrollContent ol li {
float: left;
width: 20px;
height: 20px;
font: 500 15px/20px "simsun";
text-align: center;
background-color: #fff;
margin-right: 10px;
cursor: pointer;
} .scrollContent ol li.current {
background-color: yellow;
}
</style>
</head>
<body>
<div class="scrollImg">
<div class="scrollContent" id="scrollContent">
<ul>
<li><img src="data:images/1.jpg"></li>
<li><img src="data:images/2.jpg"></li>
<li><img src="data:images/3.jpg"></li>
<li><img src="data:images/4.jpg"></li>
<li><img src="data:images/5.jpg"></li>
</ul>
<ol>
<li class="current">1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
</ol>
</div>
<script>
var scrollContent = document.getElementById("scrollContent");
var scrollUl = scrollContent.children[0];
var icon = scrollContent.children[1];
var iconLiArr = icon.children;
var imgWidth = scrollContent.offsetWidth;
//1、将第一张图片克隆到最后一张
var imgEle = scrollUl.children[0].cloneNode(true);
scrollUl.appendChild(imgEle);
//2、鼠标放在小图标上，对应图表点亮
//5、因为有定时器，要注意点亮的图标与图片必须要一致
for (var i = 0; i < iconLiArr.length; i++) {
iconLiArr[i].index = i;
iconLiArr[i].onmouseover = function () {
for (var j = 0; j < iconLiArr.length; j++) {
iconLiArr[j].className = "";
}
this.className = "current";
animate(scrollUl, -this.index * imgWidth);
key = square = this.index;
}
}
var key = 0;
var square = 0;
//3、定时器,每隔一秒滚动一次图片,对应的图片被点亮
var timer = setInterval(autoPaly, 1000); function autoPaly() {
key++;
if (key > iconLiArr.length) {
scrollUl.style.left = "0px";
key = 1;
}
animate(scrollUl, -key * imgWidth);
square++;
if (key > iconLiArr.length - 1) {
square = 0;
}
for (var i = 0; i < iconLiArr.length; i++) {
iconLiArr[i].className = "";
}
iconLiArr[square].className = "current";
} //4、鼠标移动到图片清除定时器，离开开启定时器
scrollContent.onmouseover = function () {
clearInterval(timer);
}
scrollContent.onmouseout = function () {
timer = setInterval(autoPaly, 1000);
} //图片移动
function animate(ele, target) {
clearInterval(ele.timer);
var speed = ele.offsetLeft < target ? 15 : -15;
ele.timer = setInterval(function () {
ele.style.left = ele.offsetLeft + speed + "px";
var value = ele.offsetLeft - target;
if (Math.abs(value) <= Math.abs(speed)) {
ele.style.left = target + "px";
clearInterval(ele.timer);
}
}, 10);
}
</script>
</div>
</body>
</html>
3、箭头版本
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
* {
padding: 0;
margin: 0;
list-style: none;
} .scrollImg {
margin: 150px auto;
width: 500px;
height: 200px;
padding: 5px;
border: 1px solid #ccc;
} .scrollContent {
position: relative;
width: 500px;
height: 200px;
overflow: hidden;
} .scrollContent ul {
width: 500%;
position: absolute;
} .scrollContent ul li {
float: left;
} .arrow {
display: none;
} .arrow span {
position: absolute;
top: 50%;
margin-top: -25px;
width: 30px;
height: 50px;
font: 500 40px/50px "simsun";
text-align: center;
background-color: #ccc;
opacity: 0.6;
cursor: pointer;
} .arrow span.arrLeft {
left: 5px;
border-radius: 0 10px 10px 0;
} .arrow span.arrRight {
right: 5px;
border-radius: 10px 0 0 10px;
}
</style>
</head>
<body>
<div class="scrollImg">
<div class="scrollContent" id="scrollContent">
<ul>
<li><img src="data:images/1.jpg"></li>
<li><img src="data:images/2.jpg"></li>
<li><img src="data:images/3.jpg"></li>
<li><img src="data:images/4.jpg"></li>
<li><img src="data:images/5.jpg"></li>
</ul>
<div class="arrow">
<span class="arrLeft"><</span>
<span class="arrRight">></span>
</div>
</div>
<script>
var scrollContent = document.getElementById("scrollContent");
var scrollUl = scrollContent.children[0];
var arrow = scrollContent.children[1];
var imgWidth = scrollContent.offsetWidth; //1、鼠标移动到图片显示箭头，离开隐藏箭头
scrollContent.onmouseover = function () {
arrow.style.display = "block";
}
scrollContent.onmouseout = function () {
arrow.style.display = "none";
}
var key = 0;
//2、点击左箭头，图片向右边移动，点击右箭头，图片向左边移动
arrow.children[0].onclick = function () {
key++;
if (key > scrollUl.children.length - 1) {
key = scrollUl.children.length - 1;
}
animate(scrollUl, -key * imgWidth);
}
arrow.children[1].onclick = function () {
key--;
if (key < 0) {
key = 0;
}
animate(scrollUl, -key * imgWidth);
} //图片移动
function animate(ele, target) {
clearInterval(ele.timer);
var speed = ele.offsetLeft < target ? 15 : -15;
ele.timer = setInterval(function () {
ele.style.left = ele.offsetLeft + speed + "px";
var value = ele.offsetLeft - target;
if (Math.abs(value) <= Math.abs(speed)) {
ele.style.left = target + "px";
clearInterval(ele.timer);
}
}, 10);
}
</script>
</div>
</body>
</html>
4、箭头版本附有定时器
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
* {
padding: 0;
margin: 0;
list-style: none;
} .scrollImg {
margin: 150px auto;
width: 500px;
height: 200px;
padding: 5px;
border: 1px solid #ccc;
} .scrollContent {
position: relative;
width: 500px;
height: 200px;
overflow: hidden;
} .scrollContent ul {
width: 600%;
position: absolute;
} .scrollContent ul li {
float: left;
} .arrow {
display: none;
} .arrow span {
position: absolute;
top: 50%;
margin-top: -25px;
width: 30px;
height: 50px;
font: 500 40px/50px "simsun";
text-align: center;
background-color: #ccc;
opacity: 0.6;
cursor: pointer;
} .arrow span.arrLeft {
left: 5px;
border-radius: 0 10px 10px 0;
} .arrow span.arrRight {
right: 5px;
border-radius: 10px 0 0 10px;
}
</style>
</head>
<body>
<div class="scrollImg">
<div class="scrollContent" id="scrollContent">
<ul>
<li><img src="data:images/1.jpg"></li>
<li><img src="data:images/2.jpg"></li>
<li><img src="data:images/3.jpg"></li>
<li><img src="data:images/4.jpg"></li>
<li><img src="data:images/5.jpg"></li>
</ul>
<div class="arrow">
<span class="arrLeft"><</span>
<span class="arrRight">></span>
</div>
</div>
<script>
var scrollContent = document.getElementById("scrollContent");
var scrollUl = scrollContent.children[0];
var arrow = scrollContent.children[1];
var imgWidth = scrollContent.offsetWidth;
//1、复制第一张图片放到最后一张
var imgEle = scrollUl.children[0].cloneNode(true);
scrollUl.appendChild(imgEle);
var key = 0;
//2、定时器,每隔一秒滚动一次图片,对应的图片被点亮
var timer = setInterval(autoPaly, 1000); function autoPaly() {
key++;
if (key > scrollUl.children.length - 1) {
scrollUl.style.left = "0px";
key = 1;
}
animate(scrollUl, -key * imgWidth);
} //3、鼠标移动到图片清除定时器，显示箭头，离开开启定时器，隐藏箭头
scrollContent.onmouseover = function () {
arrow.style.display = "block";
clearInterval(timer);
}
scrollContent.onmouseout = function () {
arrow.style.display = "none";
timer = setInterval(autoPaly, 1000);
} //4、点击左箭头，图片向右边移动，点击右箭头，图片向左边移动
arrow.children[0].onclick = function () {
autoPaly();
}
arrow.children[1].onclick = function () {
key--;
if (key < 0) {
scrollUl.style.left = -(scrollUl.children.length - 1) * imgWidth + "px";
key = scrollUl.children.length - 2;
}
animate(scrollUl, -key * imgWidth);
} //图片移动
function animate(ele, target) {
clearInterval(ele.timer);
var speed = ele.offsetLeft < target ? 15 : -15;
ele.timer = setInterval(function () {
ele.style.left = ele.offsetLeft + speed + "px";
var value = ele.offsetLeft - target;
if (Math.abs(value) <= Math.abs(speed)) {
ele.style.left = target + "px";
clearInterval(ele.timer);
}
}, 10);
}
</script>
</div>
</body>
</html>
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