輪播圖是網站中常見的效果，如淘寶，京東的商品輪播。 ...
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
</head>
<style>
* {box-sizing:border-box}
body {font-family: Verdana,sans-serif;}
.mySlides {display:none}
/* 幻燈片容器 */
.slideshow-container {
max-width: 1000px;
position: relative;
margin: auto;
}
/* 下一張 & 上一張 按鈕 */
.prev, .next {
cursor: pointer;
position: absolute;
top: 50%;
width: auto;
margin-top: -22px;
padding: 16px;
color: white;
font-weight: bold;
font-size: 18px;
transition: 0.6s ease;
border-radius: 0 3px 3px 0;
}
/* 定位 "下一張" 按鈕靠右 */
.next {
right: 0;
border-radius: 3px 0 0 3px;
}
/* On hover, add a black background color with a little bit see-through */
.prev:hover, .next:hover {
background-color: rgba(0,0,0,0.8);
}
/* 標題文本 */
.text {
color: #f2f2f2;
font-size: 15px;
padding: 8px 12px;
position: absolute;
bottom: 8px;
width: 100%;
text-align: center;
}
/* 數字文本 (1/3 等) */
.numbertext {
color: #f2f2f2;
font-size: 12px;
padding: 8px 12px;
position: absolute;
top: 0;
}
/* 標記符號 */
.dot {
cursor:pointer;
height: 13px;
width: 13px;
margin: 0 2px;
background-color: #bbb;
border-radius: 50%;
display: inline-block;
transition: background-color 0.6s ease;
}
.active, .dot:hover {
background-color: #717171;
}
/* 淡出動畫 */
.fade {
-webkit-animation-name: fade;
-webkit-animation-duration: 1.5s;
animation-name: fade;
animation-duration: 1.5s;
}
@-webkit-keyframes fade {
from {opacity: .4}
to {opacity: 1}
}
@keyframes fade {
from {opacity: .4}
to {opacity: 1}
}
</style>
<body>
<div class="slideshow-container">
<div class="mySlides fade">
<div class="numbertext">1 / 3</div>
<img src="https://c.runoob.com/wp-content/uploads/2017/01/img_mountains_wide.jpg" style="width:100%">
<div class="text">文本 1</div>
</div>
<div class="mySlides fade">
<div class="numbertext">2 / 3</div>
<img src="https://c.runoob.com/wp-content/uploads/2017/01/img_fjords_wide.jpg" style="width:100%">
<div class="text">文本 2</div>
</div>
<div class="mySlides fade">
<div class="numbertext">3 / 3</div>
<img src="https://c.runoob.com/wp-content/uploads/2017/01/img_nature_wide.jpg" style="width:100%">
<div class="text">文本 3</div>
</div>
<a class="prev" onclick="plusSlides(-1)">❮</a>
<a class="next" onclick="plusSlides(1)">❯</a>
</div>
<br>
<div style="text-align:center">
<span class="dot" onclick="currentSlide(1)"></span>
<span class="dot" onclick="currentSlide(2)"></span>
<span class="dot" onclick="currentSlide(3)"></span>
</div>
</body>
</html>
<script>
var slideIndex = 1;
showSlides(slideIndex);
// $(function(){
// showSlides(1);
// });
function plusSlides(n) {
showSlides(slideIndex += n);
}
//小圓點 屬性：onclick
function currentSlide(n) {
showSlides(slideIndex = n);
}
function showSlides(n) {
// alert('zhixing');
var i;
var slides = document.getElementsByClassName("mySlides");
var dots = document.getElementsByClassName("dot");
if (n > slides.length) {slideIndex = 1}
if (n < 1) {slideIndex = slides.length}
//全部隱藏
for (i = 0; i < slides.length; i++) {
slides[i].style.display = "none";
}
//全部小圓點取消高亮
for (i = 0; i < dots.length; i++) {
dots[i].className = dots[i].className.replace(" active", "");
}
//對應的div顯示+對應的小圓點高亮
slides[slideIndex-1].style.display = "block";
dots[slideIndex-1].className += " active";
}
</script>
