纯 CSS 创作一个表达怀念童年心情的条纹彩虹心特效

一时失言乱红尘 2022-04-15 05:52 129阅读 0赞

![1504257-20181122120838865-641895178.png][]

## 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/QxbmxJ][https_codepen.io_comehope_pen_QxbmxJ]

## 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/cepNzTW][https_scrimba.com_p_pEgDAM_cepNzTW]

## 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，容器中包含 9 个 ：

居中显示：

body {
        margin: 0;
        height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
        background: radial-gradient(circle at center, navy, black);
    }

定义容器尺寸：

.heart {
        width: 14em;
        height: 11em;
    }

布局容器中的竖条纹：

.heart {
        display: flex;
        justify-content: space-between;
    }
    
    .heart span {
        width: 1em;
        background-color: lightblue;
        border-radius: 0.5em;
    }

为竖条纹配色，条纹的样式是左右对称的：

.heart span {
        background-color: var(--c);
    }
    
    .heart span:nth-child(1),
    .heart span:nth-child(9) {
        --c: orangered;
    }
    
    .heart span:nth-child(2),
    .heart span:nth-child(8) {
        --c: gold;
    }
    
    .heart span:nth-child(3),
    .heart span:nth-child(7) {
        --c: limegreen;
    }
    
    .heart span:nth-child(4),
    .heart span:nth-child(6) {
        --c: dodgerblue;
    }
    
    .heart span:nth-child(5) {
        --c: mediumpurple;
    }

为竖条纹设置高度，组成心形图案：

.heart span {
        height: var(--h);
        position: relative;
        top: var(--t);
    }
    
    .heart span:nth-child(1),
    .heart span:nth-child(9) {
        --h: 3em;
        --t: 2.2em;
    }
    
    .heart span:nth-child(2),
    .heart span:nth-child(8) {
        --h: 6em;
        --t: 0.6em;
    }
    
    .heart span:nth-child(3),
    .heart span:nth-child(7) {
        --h: 8em;
        --t: 0;
    }
    
    .heart span:nth-child(4),
    .heart span:nth-child(6) {
        --h: 9em;
        --t: 0.8em;
    }
    
    .heart span:nth-child(5) {
        --h: 9.4em;
        --t: 1.6em;
    }

设置位移动画效果：

.heart span {
        animation: beating 5s infinite;
    }
    
    @keyframes beating{
        0%, 30% {
            top: var(--t);
            height: var(--h);
        }
    
        60%, 70% {
            top: 25%;
            height: 50%;
        }
    }

最后，为动画过程中的条纹设置去色、模糊和变窄效果，加强与彩色条纹的差异对比：

@keyframes beating{
        0%, 30% {
            background-color: var(--c);
            filter: blur(0);
            width: 1em;
        }
    
        60%, 70% {
            background-color: lightblue;
            filter: blur(5px);
            width: 0.1em;
        }
    }

大功告成！

原文地址：[https://segmentfault.com/a/1190000015126240][https_segmentfault.com_a_1190000015126240]

[1504257-20181122120838865-641895178.png]: /images/20220415/004559bc032d4d0cafd3ec9828326f7b.png
[Link 1]: https://www.jqhtml.com/yanshi?demourl=%2Fwp-content%2Fuploads%2F2018%2F11%2Ffront-end-daily-challenges-master%2F039-stripe-rainbow-heart&demotitle=%E7%BA%AF%20CSS%20%E5%88%9B%E4%BD%9C%E4%B8%80%E4%B8%AA%E8%A1%A8%E8%BE%BE%E6%80%80%E5%BF%B5%E7%AB%A5%E5%B9%B4%E5%BF%83%E6%83%85%E7%9A%84%E6%9D%A1%E7%BA%B9%E5%BD%A9%E8%99%B9%E5%BF%83%E7%89%B9%E6%95%88
[https_codepen.io_comehope_pen_QxbmxJ]: https://codepen.io/comehope/pen/QxbmxJ
[https_scrimba.com_p_pEgDAM_cepNzTW]: https://scrimba.com/p/pEgDAM/cepNzTW
[Link 2]: http://www.jqhtml.com/19306.html
[https_github.com_comehope_front-end-daily-challenges]: https://github.com/comehope/front-end-daily-challenges
[https_segmentfault.com_a_1190000015126240]: https://segmentfault.com/a/1190000015126240