原生javascript+CSS实现轮播图效果
本文实例为大家分享了javascript+CSS实现轮播图效果的具体代码,供大家参考,具体内容如下
1.html
<ul id="banner" ></ul>
2.css
ul{ list-style:none; position: absolute; padding: 0; left: 0; right: 0; bottom: 0; top:0; margin:auto; width: 800px; height:200px; }
3.js
//生成轮播图 export function generateBanner(){ let sz = new Array(); let cur_ul = document.getElementById('banner'); const recommends = this.recommends; let timer = setInterval(getNextLi, 3000); //生成轮播图li for (let i = 0; i < recommends.length; i++) { //生成标签 let cur_li = document.createElement("li"); let cur_img = document.createElement("img"); //追加属性 cur_img.src = recommends[i].pic; //追加样式 cur_li.style.position = 'absolute'; cur_li.style.left = '0px'; cur_li.style.transitionDuration = '0.4s'; cur_li.style.cursor="pointer"; //ul总宽800 ,显示一张完整的400px 两张不完整的200px cur_img.style.width = '125px'; cur_img.style.height = "100px"; //追加子元素 cur_li.appendChild(cur_img); cur_ul.appendChild(cur_li); //全部放入数组好操作 sz.push(cur_li); } //生成两个图标 generateAngleIcons(); //将最后三张图片用来显示 let len = sz.length - 1; //倒数第三张 showThreeLi(); //获取下一个li显示,将第一个放到数组最后 function getNextLi() { const li = sz[0]; sz = sz.slice(1); sz.push(li); //所有li还原 for (let i = 0; i < sz.length; i++) { //li全部还原成原始大小 sz[i].style.transform = "scale(1)"; sz[i].style.left = "0px"; //从小到大li依此覆盖 sz[i].style.zIndex = i; //全部隐藏 sz[i].style.display = "none"; } //显示最后三张 showThreeLi(); } //显示最后三张 function showThreeLi() { sz[len - 2].style.left = "0px"; //倒数第二张 sz[len - 1].style.left = "120px"; sz[len - 1].style.zIndex = 100; sz[len - 1].style.transform = "scale(1.3)"; //倒数第一张 sz[len].style.left = "230px"; //显示 sz[len - 2].style.display = "block"; sz[len - 1].style.display = "block"; sz[len].style.display = "block"; } function generateAngleIcons(){ const icons = new Array(); for (let i = 0; i < 2; i++) { //生成图标li let cur_li = document.createElement("li"); //追加样式 cur_li.style.position = 'absolute'; cur_li.style.top = '0px'; cur_li.style.bottom = '0px'; cur_li.style.margin = "auto"; cur_li.style.paddingTop="100px"; cur_li.style.paddingBottom="100px"; cur_li.style.zIndex = 20; icons.push(cur_li); } icons[0].style.left = '0px'; icons[1].style.right = '0px'; icons[0].innerHTML = '<i class="angle left icon"></i>' icons[1].innerHTML = '<i class="angle right icon"></i>' cur_ul.appendChild(icons[1]); cur_ul.appendChild(icons[0]); } }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持我们。
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