html+css实现图片扫描仪特效

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本文主要介绍了html css 图片扫描仪，分享给大家，具体如下：

效果：

这样，有抖动的：

无抖动的：

实现：

1.定义一个盒子：

<body>
    <div class="tu"></div>
</body>

2.基本样式，长宽背景图等等~

 .tu{
            width: 500px;
            height: 300px;
            background-image: url(8.jpg);
            background-size: 100% auto;
            background-repeat: no-repeat;
            position: relative;
            overflow: hidden;
            cursor: pointer;
        }

cursor: pointer;鼠标经过盒子样式为小手

3.用伪类元素做扫描线，基本样式：

 .tu::after{
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 500px;
            height: 35px;
            background-image: url(8.jpg);
            background-size: 100% auto;
            background-repeat: no-repeat;
            filter: sepia(100%); 
            opacity: 0;
           
        }

filter: sepia(100%); 图片发黄。
filter: invert(100%); 像X光底片。

4.实现扫描：

.tu:hover::after{
            opacity: 1;
            animation: move 1.8s linear infinite;
        }
        @keyframes move{
            0%{
                top: 0;
                background-position: 6px 0px; 
            }
            20%{
                top: 60px;
                background-position: -6px -60px; 
            }
            40%{
                top: 120px;
                background-position: 6px -120px; 
            }
            60%{
                top: 180px;
                background-position: -6px -180px; 
            }
            80%{
                top: 240px;
                background-position: 6px -240px; 
            }
            100%{
                top: 300px;
                background-position: -6px -300px; 
            }
        }

让background-position的y轴位移刚好等于top的距离，然后x轴为0的话就不抖，有数值就会抖动。

完整代码：

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body{
            height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            background-color: rgb(0, 0, 0);
        }
        .tu{
            width: 500px;
            height: 300px;
            background-image: url(8.jpg);
            background-size: 100% auto;
            background-repeat: no-repeat;
            position: relative;
            overflow: hidden;
            cursor: pointer;
        }
        .tu::after{
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 500px;
            height: 20px;
            background-image: url(8.jpg);
            background-size: 100% auto;
            background-repeat: no-repeat;
            filter: invert(100%); 
            opacity: 0;
           
        }
        .tu:hover::after{
            opacity: 1;
            animation: move 1.8s linear infinite;
        }
        @keyframes move{
            0%{
                top: 0;
                background-position: 6px 0px; 
            }
            20%{
                top: 60px;
                background-position: -6px -60px; 
            }
            40%{
                top: 120px;
                background-position: 6px -120px; 
            }
            60%{
                top: 180px;
                background-position: -6px -180px; 
            }
            80%{
                top: 240px;
                background-position: 6px -240px; 
            }
            100%{
                top: 300px;
                background-position: -6px -300px; 
            }
        }
    </style>
</head>
<body>
    <div class="tu"></div>
</body>
</html>