javascript 幻灯片代码(含自动播放)（ NPM 国内慢的问题解决）

javascript 幻灯片代码(含自动播放)（ NPM 国内慢的问题解决） 源码部分

对应的图片地址改为自己的图片地址：

HTML 代码：<div class="slideshow-container"> <div class="mySlides fade"> <div class="numbertext">1 / 3</div> <img src="img1.jpg" style="width:100%"> <div class="text">文本 1</div> </div> <div class="mySlides fade"> <div class="numbertext">2 / 3</div> <img src="img2.jpg" style="width:100%"> <div class="text">文本 2</div> </div> <div class="mySlides fade"> <div class="numbertext">3 / 3</div> <img src="img3.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>

CSS 代码设置上一张下一张图片的按钮及文本。

CSS 代码：* {box-sizing:border-box}body {font-family: Verdana,sans-serif;}.mySlides {display:none} /* 幻灯片容器 */.slideshow-container { max-width: 1000px; position: relative; margin: auto;} /* 下一张 & 上一张 按钮 */.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 "下一张" 按钮靠右 */.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);} /* 标题文本 */.text { color: #f2f2f2; font-size: 15px; padding: 8px 12px; position: absolute; bottom: 8px; width: 100%; text-align: center;} /* 数字文本 (1/3 等) */.numbertext { color: #f2f2f2; font-size: 12px; padding: 8px 12px; position: absolute; top: 0;} /* 标记符号 */.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;} /* 淡出动画 */.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}}JavaScript 代码：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"); var dots = document.getElementsByClassName("dot"); if (n > slides.length) {slideIndex = 1} if (n < 1) {slideIndex = slides.length} for (i = 0; i < slides.length; i++) { slides[i].style.display = "none"; } for (i = 0; i < dots.length; i++) { dots[i].className = dots[i].className.replace(" active", ""); } slides[slideIndex-1].style.display = "block"; dots[slideIndex-1].className += " active";}在线演示

你也可以将幻灯片设置为自动播放，JavaScript 代码修改为如下：

JavaScript 代码：var slideIndex = 0;showSlides(); function showSlides() { var i; var slides = document.getElementsByClassName("mySlides"); var dots = document.getElementsByClassName("dot"); for (i = 0; i < slides.length; i++) { slides[i].style.display = "none"; } slideIndex++; if (slideIndex > slides.length) {slideIndex = 1} for (i = 0; i < dots.length; i++) { dots[i].className = dots[i].className.replace(" active", ""); } slides[slideIndex-1].style.display = "block"; dots[slideIndex-1].className += " active"; setTimeout(showSlides, 2000); // 切换时间为 2 秒}在线演示