幻灯片(Slide Show)是一种常见的网页设计元素,用于展示一系列的图片、文本或其他内容,并且通常带有一些过渡效果和自动播放功能。使用JavaScript可以实现丰富的幻灯片效果。
以下是一个简单的幻灯片效果的示例代码:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Slide Show Example</title>
<link rel="stylesheet" href="styles.css">
</head>
<body>
<div class="slideshow-container">
<div class="slide fade">
<img src="image1.jpg" alt="Image 1">
</div>
<div class="slide fade">
<img src="image2.jpg" alt="Image 2">
</div>
<div class="slide fade">
<img src="image3.jpg" alt="Image 3">
</div>
<a class="prev" onclick="plusSlides(-1)">❮</a>
<a class="next" onclick="plusSlides(1)">❯</a>
</div>
<script src="script.js"></script>
</body>
</html>
* {
box-sizing: border-box;
}
body {
font-family: Arial, sans-serif;
}
.slideshow-container {
position: relative;
max-width: 800px;
margin: auto;
}
.slide {
display: none;
position: relative;
}
.slide img {
width: 100%;
}
.fade {
animation-name: fade;
animation-duration: 1.5s;
}
@keyframes fade {
from {opacity: .4}
to {opacity: 1}
}
.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;
user-select: none;
}
.next {
right: 0;
border-radius: 3px 0 0 3px;
}
.prev:hover, .next:hover {
background-color: rgba(0,0,0,0.8);
}
let slideIndex = 0;
showSlides();
function showSlides() {
let i;
const slides = document.getElementsByClassName("slide");
for (i = 0; i < slides.length; i++) {
slides[i].style.display = "none";
}
slideIndex++;
if (slideIndex > slides.length) {slideIndex = 1}
slides[slideIndex-1].style.display = "block";
setTimeout(showSlides, 2000); // Change image every 2 seconds
}
function plusSlides(n) {
slideIndex += n;
const slides = document.getElementsByClassName("slide");
if (slideIndex > slides.length) {slideIndex = 1}
if (slideIndex < 1) {slideIndex = slides.length}
for (let i = 0; i < slides.length; i++) {
slides[i].style.display = "none";
}
slides[slideIndex-1].style.display = "block";
}
setTimeout
函数的调用。通过以上代码和解释,你可以实现一个基本的幻灯片效果,并根据需要进行扩展和优化。
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