前端学习-第一阶段-day13_一阶段nth-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_34723035/article/details/110621642

本文通过一个具体的实例展示了如何使用CSS来创建动态效果。该实例中，一系列彩色长条会在盒子内随时间变化高度与位置，形成有趣的视觉效果。文章详细介绍了CSS动画属性与选择器的应用，适合初学者学习。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

练习图片

在这里插入图片描述

代码

<!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>
        

        * {
            box-sizing: border-box;
        }

        .box {
            padding-top: 100px;
            padding-left: 40px;
            margin: 100px auto;
            width: 500px;
            height: 300px;
            border: 1px solid black;
        }

        .long {
            float: left;
            margin-right: 10px;
            width: 20px;
            height: 20px;
            border: 1px solid black;
            border-radius: 20px;

        }

        .long-pink {
            background-color: #f62e74;
        }

        .long-red {
            background-color: #f45330;
        }

        .long-brown {
            background-color: #ffc883;
        }

        .long-green {
            background-color: #30d268;
        }

        .long-blue {
            background-color: #006cb4;
        }

        .long:nth-child(1) {
            animation: color1 2s infinite;

        }
        .long:nth-child(2) {
            animation: color2 2s infinite ;

        }
        .long:nth-child(3) {
            animation: color3 2s infinite ;

        }
        .long:nth-child(4) {
            animation: color4 2s infinite ;

        }
        .long:nth-child(5) {
            animation: color5 2s infinite ;

        }
        .long:nth-child(6) {
            animation: color6 2s infinite ;

        }
        .long:nth-child(7) {
            animation: color7 2s infinite ;

        }
        .long:nth-child(8) {
            animation: color8 2s infinite ;

        }
        .long:nth-child(9) {
            animation: color9 2s infinite ;

        }

        @keyframes color1 {
            0% {
                transform: translateY(0);
                height: 20px;
            }

            100% {
                transform: translateY(-20px);
                height: 60px;
            }
        }
        @keyframes color2 {
           
            10% {
                transform: translateY(0);
                height: 20px;
            }

            100% {
                transform: translateY(-40px);
                height: 100px;
            }
        }
        @keyframes color3 {
            
            20% {
                transform: translateY(0);
                height: 20px;
            }

            100% {
                transform: translateY(-60px);
                height: 140px;
            }
        }
        @keyframes color4 {
            
            30% {
                transform: translateY(0);
                height: 20px;
            }

            100% {
                transform: translateY(-40px);
                height: 140px;
            }
        }
        @keyframes color5 {
 
            40% {
                transform: translateY(0);
                height: 20px;
            }

            100% {
                transform: translateY(-20px);
                height: 140px;
            }
        }
        @keyframes color6 {
            
            50% {
                transform: translateY(0);
                height: 20px;
            }

            100% {
                transform: translateY(-40px);
                height: 140px;
            }
        }
        @keyframes color7 {
            
            60% {
                transform: translateY(0);
                height: 20px;
            }

            100% {
                transform: translateY(-60px);
                height: 140px;
            }
        }
        @keyframes color8 {
           
           70% {
               transform: translateY(0);
               height: 20px;
           }

           100% {
               transform: translateY(-40px);
               height: 100px;
           }
       }
       @keyframes color9 {
            80% {
                transform: translateY(0);
                height: 20px;
            }

            100% {
                transform: translateY(-20px);
                height: 60px;
            }
        }
    </style>
</head>

<body>
    <div class="box">
        <div class="long long-pink"></div>
        <div class="long long-red"></div>
        <div class="long long-brown"></div>
        <div class="long long-green"></div>
        <div class="long long-blue"></div>
        <div class="long long-green"></div>
        <div class="long long-brown"></div>
        <div class="long long-red"></div>
        <div class="long long-pink"></div>
        <div style="clear: both;"></div>

    </div>
</body>

</html>