效果预览
在线演示
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/BVpvMz
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/cZ8Ebf7
源代码下载
本地下载
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
代码解读
定义 dom,容器中包含 8 个子元素:
<div class="coil"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span>
</div>
居中显示:
body {margin: 0;height: 100vh;display: flex;align-items: center;justify-content: center;background: radial-gradient(circle at center, midnightblue, black);
}
画出纹香盘要用的框线:
.coil {position: relative;display: flex;justify-content: center;
}.coil span {position: absolute;width: calc((var(--n) * 2 - 1) * 1em);height: calc((var(--n) - 0.5) * 1em);border: 1em solid darkgreen;
}.coil span:nth-child(1) {--n: 1;
}.coil span:nth-child(2) {--n: 2;
}.coil span:nth-child(3) {--n: 3;
}.coil span:nth-child(4) {--n: 4;
}.coil span:nth-child(5) {--n: 5;
}.coil span:nth-child(6) {--n: 6;
}.coil span:nth-child(7) {--n: 7;
}.coil span:nth-child(8) {--n: 8;
}
把一半框线放置到上方:
.coil span:nth-child(odd) {align-self: flex-end;
}
删除掉上方框线的下边框,和下方框线的上边框:
.coil span:nth-child(odd) {border-bottom: none;
}.coil span:nth-child(even) {border-top: none;
}
对齐上下边框:
.coil span:nth-child(even) {transform: translateX(-1em);
}
把边框改为曲线:
.coil span:nth-child(odd) {border-radius: 50% 50% 0 0 / 100% 100% 0 0;
}.coil span:nth-child(even) {border-radius: 0 0 50% 50% / 0 0 100% 100%;
}
用伪元素画出蚊香最中间的部分:
.coil::before {content: '';position: absolute;width: 1em;height: 1em;background-color: darkgreen;border-radius: 50%;left: -1.5em;top: -0.5em;
}
用伪元素画出蚊香的燃点:
.coil::after {content: '';position: absolute;width: 1em;height: 1em;border-radius: 50%;top: -0.5em;background-color: darkred;left: -9.5em;z-index: -1;transform: scale(0.9);box-shadow: 0 0 1em white;
}
最后,为燃点增加闪动的效果:
.coil::after {animation: blink 1s linear infinite alternate;
}@keyframes blink {to {box-shadow: 0 0 0 white;}
}
大功告成!
原文地址:https://segmentfault.com/a/1190000015246974
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