(编辑:jimmy 日期: 2024/10/31 浏览:2)
功能
原理
首先说下原理。
这种方法也可以做到整个页面始终只有2个img标签,而不必把所有的img节点全部创建出来,要点是每次更换不可见img的src。
动画的实现
这样就完成了一次移动的动画。
html代码
<header> <div class="box"> <img src="/UploadFiles/2021-04-02/banner1.jpg">JS代码
var timeout = null; window.onload = function () { var oLeft = document.querySelector('.left'); var oRight = document.querySelector('.right'); var oButton = document.querySelector('.buttons'); var oButtons = document.querySelectorAll('.buttons div'); var oImgs = document.querySelectorAll('.box img'); var imgWidth = oImgs[0].width; var gIndex = 0; begainAnimate(); // 绑定左右点击事件 oLeft.onclick = function () { clearTimeout(timeout); leftMove(); begainAnimate(); }; oRight.onclick = function () { clearTimeout(timeout); rightMove(); begainAnimate(); }; // 绑定数字序号事件 oButton.onclick = function (event) { clearTimeout(timeout); var targetEl = event.target; var nextIndex = (+targetEl.innerText) - 1; console.log(nextIndex); rightMove(nextIndex); begainAnimate(); } // 默认初始动画朝右边 function begainAnimate() { clearTimeout(timeout); timeout = setTimeout(function () { rightMove(); begainAnimate(); }, 3000); } // 向左移动动画 function leftMove() { var nextIndex = (gIndex - 1 < 0) "htmlcode"><style> /* 首先设置图片box的区域,将图片重叠在一起 */ header { width: 100%; position: relative; overflow: hidden; } .box { width: 100%; height: 300px; } .box img { width: 100%; height: 100%; position: absolute; transform: translateX(0); z-index: 1; } .box img:first-child { z-index: 10; } /* 数字序列按钮 */ .buttons { position: absolute; right: 10%; bottom: 5%; display: flex; z-index: 100; } .buttons div { width: 30px; height: 30px; background-color: #aaa; border: 1px solid #aaa; text-align: center; margin: 10px; cursor: pointer; opacity: .7; border-radius: 15px; line-height: 30px; } .buttons div.active { background-color: white; } /* 左右切换按钮 */ .left, .right { position: absolute; width: 80px; height: 80px; background-color: #ccc; z-index: 100; top: 110px; border-radius: 40px; opacity: .5; cursor: pointer; } .left { left: 2%; } .right { right: 2%; } .left .arrow { width: 30px; height: 30px; border-left: solid 5px #666; border-top: solid 5px #666; transform: translate(-5px, 25px) rotate(-45deg) translate(25px, 25px); } .right .arrow { width: 30px; height: 30px; border-left: solid 5px #666; border-top: solid 5px #666; transform: translate(50px, 25px) rotate(135deg) translate(25px, 25px); } </style>