HTML + CSS to realize the special effects of image scanner

Time:2021-10-18

This article mainly introduces the HTML CSS image scanner and shares it with you as follows:

effect:

In this way, there are jitters:

在这里插入图片描述

Jitter free:

在这里插入图片描述

realization:

1. Define a box:


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

2. Basic style, length and width background drawing, etc~


 .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; The mouse passes through the box and the style is small hand

3. Use pseudo class elements as scan lines. Basic style:


 .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%); The picture turns yellow.
filter: invert(100%); Like an X-ray negative.

4. Realize scanning:


.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; 
            }
        }

Let the y-axis displacement of the background position just equal to the distance of the top, and then if the x-axis is 0, it will not shake, and if there is a value, it will shake.

Full code:


<!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>

Summary:

This is the idea of a foreign blogger on the Internet, and then I got one myself. Although the effect is relatively simple, it is also very fun~

This is the end of this article about html + CSS to realize the special effects of image scanner. For more information about html + CSS image scanner, please search the previous articles of developeppaer or continue to browse the relevant articles below. I hope you will support developeppaer in the future!