如何用DOM 元素就能画出国宝熊猫

骑猪看日落 2022-04-15 05:44 192阅读 0赞

![1504257-20181122111432556-2074959094.gif][]

## 效果预览 ##

[在线演示][Link 1]

按下右侧的“点击预览”按钮可以在当前页面预览，点击链接可以全屏预览。

[https://codepen.io/comehope/pen/odKrpy][https_codepen.io_comehope_pen_odKrpy]

## 可交互视频教程 ##

此视频是可以交互的，你可以随时暂停视频，编辑视频中的代码。

请用 chrome, safari, edge 打开观看。

[https://scrimba.com/p/pEgDAM/cV7J6SK][https_scrimba.com_p_pEgDAM_cV7J6SK]

## 源代码下载 ##

[本地下载][Link 2]

每日前端实战系列的全部源代码请从 github 下载：

[https://github.com/comehope/front-end-daily-challenges][https_github.com_comehope_front-end-daily-challenges]

## 代码解读 ##

定义 dom，只有一个元素：

居中显示：

body {
        margin: 0;
        height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
        background-color: mediumturquoise;
    }

定义容器尺寸：

.panda {
        width: 21em;
        height: 16em;
        background-color: white;
    }

画出头部轮廓：

.panda {
        border: 0.5em solid #333;
        border-top-left-radius: 11em;
        border-top-right-radius: 11em;
        border-bottom-left-radius: 11em 6em;
        border-bottom-right-radius: 11em 6em;
    }

画出右眼轮廓：

.panda {
        position: relative;
    }
    
    .panda::before {
        content: '';
        position: absolute;
        width: 7em;
        height: 4em;
        left: 2.9em;
        top: 5.5em;
        background-color: #333;
        border-radius: 50% 50% 45% 42%;
        transform: rotate(-45deg);
    }

类似地，画出左眼轮廓：

.panda::after {
        content: '';
        position: absolute;
        width: 7em;
        height: 4em;
        left: 11.1em;
        top: 5.5em;
        background-color: #333;
        border-radius: 50% 50% 42% 45%;
        transform: rotate(45deg);
    }

画出两只耳朵：

.panda::before {
        box-shadow: 1em -7.2em 0 -0.4em #333;
    }
    
    .panda::after {
        box-shadow: -1em -7.2em 0 -0.4em #333;
    }

画出两只眼睛：

.panda::before {
        background-image: 
            radial-gradient(circle at 5.1em 2em, white 0.3em, transparent 0.3em), 
            radial-gradient(circle at 4.6em 2em, #333 0.7em, transparent 0.7em), 
            radial-gradient(circle at 4.5em 2em, white 1em, transparent 1em);
    }
    
    .panda::after {
        background-image: 
            radial-gradient(circle at 2.4em 1.5em, white 0.3em, transparent 0.3em), 
            radial-gradient(circle at 2.4em 2em, #333 0.7em, transparent 0.7em), 
            radial-gradient(circle at 2.5em 2em, white 1em, transparent 1em);
    }

画出鼻子和嘴：

.panda {
        background-image: 
            radial-gradient(ellipse at 50% 60%, #333 1.2em, transparent 1.2em),
            radial-gradient(ellipse at 50% 80%, #555 0.6em, transparent 0.6em);
    }

增加一点立体效果：

.panda {
        border-bottom-width: 1em;
        box-shadow: inset 1em -1em 0 #eee;
    }

让右眼动起来：

.panda::before {
        animation: before-animate 1s ease-in-out infinite alternate;
    }
    
    @keyframes before-animate {
        to {
            background-image: 
                radial-gradient(circle at 4.9em 1.8em, white 0.3em, transparent 0.3em), 
                radial-gradient(circle at 4.4em 1.8em, #333 0.7em, transparent 0.7em), 
                radial-gradient(circle at 4.5em 2em, white 1em, transparent 1em);
        }
    }

类似地，让左眼也动起来：

.panda::after {
        animation: after-animate 1s ease-in-out infinite alternate -1s;
    }
    
    @keyframes after-animate {
        to {
            background-image: 
                radial-gradient(circle at 2.6em 1.3em, white 0.3em, transparent 0.3em), 
                radial-gradient(circle at 2.6em 1.8em, #333 0.7em, transparent 0.7em), 
                radial-gradient(circle at 2.5em 2em, white 1em, transparent 1em);
        }
    }

最后，让黑眼圈和耳朵也动起来：

@keyframes before-animate {
        to {
            transform: rotate(-40deg);
        }
    }
    
    @keyframes after-animate {
        to {
            transform: rotate(40deg);
        }
    }

大功告成！

原文地址：[https://segmentfault.com/a/1190000015052653][https_segmentfault.com_a_1190000015052653]

[1504257-20181122111432556-2074959094.gif]: /images/20220415/f256da8704614016a9a36bc3da73c70a.png
[Link 1]: https://www.jqhtml.com/yanshi?demourl=%2Fwp-content%2Fuploads%2F2018%2F11%2Ffront-end-daily-challenges-master%2F035-panda&demotitle=DOM%20%E5%85%83%E7%B4%A0%E5%B0%B1%E8%83%BD%E7%94%BB%E5%87%BA%E5%9B%BD%E5%AE%9D%E7%86%8A%E7%8C%AB
[https_codepen.io_comehope_pen_odKrpy]: https://codepen.io/comehope/pen/odKrpy
[https_scrimba.com_p_pEgDAM_cV7J6SK]: https://scrimba.com/p/pEgDAM/cV7J6SK
[Link 2]: http://www.jqhtml.com/19294.html
[https_github.com_comehope_front-end-daily-challenges]: https://github.com/comehope/front-end-daily-challenges
[https_segmentfault.com_a_1190000015052653]: https://segmentfault.com/a/1190000015052653