用js代码实现一个轮播图效果
时间: 2023-03-14 09:36:02 浏览: 43
下面是一个使用 JavaScript 实现轮播图效果的简单示例:
```
<div class="slideshow-container">
<div class="mySlides">
<img src="img1.jpg" style="width:100%">
</div>
<div class="mySlides">
<img src="img2.jpg" style="width:100%">
</div>
<div class="mySlides">
<img src="img3.jpg" style="width:100%">
</div>
<a class="prev" onclick="plusSlides(-1)">❮</a>
<a class="next" onclick="plusSlides(1)">❯</a>
</div>
<script>
var slideIndex = 1;
showSlides(slideIndex);
function plusSlides(n) {
showSlides(slideIndex += n);
}
function currentSlide(n) {
showSlides(slideIndex = n);
}
function showSlides(n) {
var i;
var slides = document.getElementsByClassName("mySlides");
if (n > slides.length) {slideIndex = 1}
if (n < 1) {slideIndex = slides.length}
for (i = 0; i < slides.length; i++) {
slides[i].style.display = "none";
}
slides[slideIndex-1].style.display = "block";
}
</script>
<style>
.slideshow-container {
max-width: 1000px;
position: relative;
margin: auto;
}
.mySlides {
display: none;
}
.prev, .next {
cursor: pointer;
position: absolute;
top: 50%;
width: auto;
padding: 16px;
margin-top: -22px;
color: white;
font-weight: bold;
font-size: 18px;
transition: 0.6s ease;
border-radius: 0 3px 3px 0;
}
.next {
right: 0;
border-radius: 3px 0 0 3px;
}
.prev:hover, .next:hover {
background-color: rgba(0,0,0,0.8);
}
</style>
```
在这个代码中,我们使用了 HTML、CSS 和 JavaScript 来实现轮播图效果。HTML 代码用于定义图片和切换按钮的结构,CSS 用于定义样式,JavaScript 用于实现切换图片的逻辑。