214 lines
5.4 KiB
HTML
214 lines
5.4 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>banner_1</title>
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<link rel="stylesheet" href="http://at.alicdn.com/t/c/font_3889063_w9zrujr1cf.css">
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<style>
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* {
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margin: 0;
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padding: 0;
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list-style: none;
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border: 0;
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}
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.banner {
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width: 560px;
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height: 315px;
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background: rgb(190, 165, 165);
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margin: 0 auto;
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overflow: hidden;
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position: relative;
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}
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.banner .banner_ul {
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display: flex;
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position: absolute;
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transition: all 1s;
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}
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.banner_ul li {
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width: 560px;
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height: 315px;
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}
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.banner_ul li img {
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width: 560px;
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height: 315px;
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}
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.button {
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width: 100%;
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position: absolute;
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top: 50%;
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transform: translateY(-50%);
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display: flex;
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justify-content: space-between;
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font-size: 30px;
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}
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.button div {
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display: flex;
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align-items: center;
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justify-content: center;
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width: 40px;
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height: 50px;
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background: #00000061;
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font-size: 20px;
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color: #fff;
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cursor: pointer;
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}
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.button div:last-child {
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transform: rotate(-90deg);
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}
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.banner_dot {
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position: absolute;
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bottom: 5px;
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left: 50%;
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transform: translatey(-50%);
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width: 100%;
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display: flex;
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}
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.banner_dot li {
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width: 13px;
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height: 13px;
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border-radius: 50%;
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background: #fff;
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margin-left: 5px;
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cursor: pointer;
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}
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.banner_dot li:first-child {
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margin-left: 0;
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}
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.banner_dot .active {
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background: red;
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}
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</style>
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</head>
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<body>
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<div class="banner">
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<ul class="banner_ul" style="left: 0px">
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<li><img src="https://img.alicdn.com/imgextra/i4/6000000001058/O1CN017HPzlT1Jgbr6Rvc4X_!!6000000001058-0-octopus.jpg"
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alt=""></li>
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<li><img src="https://img.alicdn.com/imgextra/i4/6000000003739/O1CN01ks7Fjr1dUVhwWXLWB_!!6000000003739-0-octopus.jpg"
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alt=""></li>
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<li><img src="https://img.alicdn.com/imgextra/i1/6000000003795/O1CN01g3s9jf1du9t00iRTU_!!6000000003795-0-octopus.jpg"
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alt=""></li>
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</ul>
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<div class="button">
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<div class="button_left iconfont icon-zhankai-copy"></div>
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<div class="button_right iconfont icon-zhankai"></div>
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</div>
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<ul class="banner_dot">
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<li class="active"></li>
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<li></li>
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<li></li>
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</ul>
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</div>
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</body>
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<script>
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//轮播图
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//点击按钮向左移动，向右移动
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//小图标跟随点击移动
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var buttonLeft = $(".button_left"),
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buttoRight = $(".button_right"),
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buttonUl = $(".banner_ul"),
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active = _(".active");
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banner_dot = _(".banner_dot li")
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var gtime = null;
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var index = 0;
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buttonLeft.onclick = () => {
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sport(-1)
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}
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buttoRight.onclick = () => {
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sport(1)
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}
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banner_dot.forEach((v, i) => {
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v.onclick = () => {
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changeActive(i);
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}
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})
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$(".banner").onmouseover = () => {
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clearInterval(gtime)
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}
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$(".banner").onmouseout = () => {
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auto()
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}
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function changeActive(i) {
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banner_dot.forEach(val => {
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val.classList.remove("active");
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})
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banner_dot[i].classList.add("active");
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buttonUl.style.left = `${i * -560}px`
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index = i
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//console.log(index);
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}
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function sport(offset) {
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//通过下标的方式改变轮播图移动
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index += offset
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//边界判断
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if( index <0){
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index = 2
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}
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if(index >2){
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index = 0
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}
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// console.log("index",index);
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if(index >= 0 && index <=2){
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changeActive(index)
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}
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// console.log("index",index);
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// if(index >=-2 && index <=0 ){
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// changeActive(index)
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// }
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// //console.log(parseInt(newLeft));
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//通过改变left值改变轮播图移动
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// var oldLeft = parseInt(buttonUl.style.left);
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// var newLeft = `${oldLeft + offset}px `
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// if (parseInt(newLeft) >= -1120 && parseInt(newLeft) <= 0) {
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// changeActive(parseInt(newLeft) / -560)
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// }
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// //向左最大移动到1120，向右最大-1120 >=0 || <=1260
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// if (parseInt(newLeft) >= -1120 && parseInt(newLeft) <= 0) {
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// buttonUl.style.left = newLeft;
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// } else {
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// newLeft = `${0}px`
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// buttonUl.style.left = newLeft;
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// }
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// changeActive(parseInt(newLeft) / -560)
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}
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function auto() {
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gtime = setInterval(() => {
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buttoRight.onclick()
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}, 2500)
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}
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auto()
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function $(className) {
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return document.querySelector(className);
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}
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function _(className) {
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return document.querySelectorAll(className);
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}
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</script>
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</html> |