lovecoding
/
web0715


			
				
					
						
						
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139
							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        /* css reset */
        body,ul{
            margin:0;
            padding: 0;
        }
        li{
            list-style: none;
        }
        body{
          height: 100vh;
          background-color: black; 
          overflow: hidden; 
        }
        .container{
            width: 490px;
            height: 170px;
            border:5px solid #fff;
            margin: 100px auto;
            position: relative;
        }
        .container .slider-img{
            position: relative;
        }
        .container .slider-img img{
            width: 490px;
            height: 170px;
        }
        .container .slider-img li{
            position: absolute;
            top:0;
            left: 0;
            display: none;
        }
        .container .slider-img .active{
            display: block;
        }
        .slider-btn{
            position: absolute;
            bottom: 10px;
            left: 0;
            width: 100%;
        }
        .slider-btn ul li{
            color: #fff;
            display: inline-block;
            width: 20px;
            height: 20px;
            background-color: #f90;
            border-radius: 50%;
            text-align: center;
            line-height: 20px;
            cursor: pointer;
        }
        .slider-btn .active{
            background-color: red;
        }
        .slider-btn .slider-btn-left{
            float: left;
            padding-left: 20px;
        }
        .slider-btn .slider-btn-right{
            float: right;
            padding-right: 20px;
        }
    </style>
</head>
<body>
    <div class="container"> 
        <div class="slider-img">
            <ul>
                <li class="img-item active">
                    <img src="./image/image.png" alt="img">
                </li>
                <li class="img-item">
                    <img src="./image/image1.png" alt="img">
                </li>
                <li class="img-item">
                    <img src="./image/image2.png" alt="img">
                </li>
                <li class="img-item">
                    <img src="./image/image3.png" alt="img">
                </li>
                <li class="img-item">
                    <img src="./image/image4.png" alt="img">
                </li>
            </ul>
        </div>
        <div class="slider-btn">
            <div class="slider-btn-left">
                <ul>
                    <li>&lt;</li>
                    <li>&gt;</li>
                </ul>
            </div>
            <div class="slider-btn-right">
                <ul>
                    <li class="num-btn active">1</li>
                    <li class="num-btn">2</li>
                    <li class="num-btn">3</li>
                    <li class="num-btn">4</li>
                    <li class="num-btn">5</li>
                </ul>
            </div>
        </div>
    </div>
    <script>
        // 获取5个数字按钮
        var numBtn = document.getElementsByClassName("num-btn");
        // 获取5张图片
        var imgItem = document.getElementsByClassName("img-item");

        // 给5个数字按钮绑定事件
        for(var i=0;i<numBtn.length;i++){
            // 循环过程当中给每一个按钮添加一个新属性index 用来保存索引i
            numBtn[i].index = i;
            numBtn[i].onmouseenter = function(){
                // 循环所有按钮 将选中状态的active类逐个移除
                for(var j=0;j<numBtn.length;j++){
                    // 移除按钮的active类
                    numBtn[j].classList.remove("active");
                    // 移除图片的选中状态 active类
                    imgItem[j].classList.remove("active");
                }
                // 向当前移入的数字按钮中添加一个新类 activ 变为选中状态
                this.classList.add("active");
                // 向制定索引的图片添加选中状态acitve类
                imgItem[this.index].classList.add("active");
            }
        }
    </script>
</body>
</html>