html - 使用纯 CSS HTML5 自定义加载图标

Question

<分区>

Answer 1

这不再是社区 wiki 帖子。圆圈上的点之间的距离由它们的位置决定，而在“播放”符号中，它由动画延迟决定(在开始之前)。

Codepen DEMO

body {
  background-color: skyblue;
  overflow: hidden;
}

#container {
  width: 200px;
  height: 200px;
  border-radius:50%;
  border: 0px solid rgba(0, 0, 0, 0.1);
  position: relative;
  box-shadow:0px 0px 0px 10px rgba(255, 255, 255, 0.05) inset;
}

#innercontainer {
  position: relative;
  width: 200px;
  height: 200px;
  margin: 0 auto ;
  animation-name: example;
  animation-duration: 1.5s;
  animation-iteration-count: infinite;
  animation-timing-function: linear;  
}

#container .a2 {  
  width:20px;
  height: 20px;
  top: 50%;
  left: 50%;
  background: white;
  border-radius: 10px;
  position: absolute;
  margin: -10px;
}

#container .a1 {
  position: absolute;
  top:30px;
  left:30px;
  animation-name: example2a;
  animation-duration: 1.5s;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
  background: white;
  width: 20px;
  height: 20px;
  border-radius: 10px;
}

#container .a {
  opacity: 1;
  -webkit-animation-delay: 0s; /* Chrome, Safari, Opera */
  animation-delay: 0s;  
}

#container .b {
  opacity: 0.9;
  -webkit-animation-delay: 0.1s; /* Chrome, Safari, Opera */
  animation-delay: 0.08s;  
}

#container .c {
  opacity: 0.8;
  -webkit-animation-delay: 0.2s; /* Chrome, Safari, Opera */
  animation-delay: 0.17s;  
}

#container .d {
  opacity: 0.7;
  -webkit-animation-delay: 0.3s; /* Chrome, Safari, Opera */
  animation-delay: 0.27s;  
}

#container .ab {
  opacity: 0.6;
  -webkit-animation-delay: 0s; /* Chrome, Safari, Opera */
  animation-delay: 0.38s;  
}

#container .bb {
  opacity: 0.5;
  -webkit-animation-delay: 0.1s; /* Chrome, Safari, Opera */
  animation-delay: 0.50s;  
}

#container .cb {
  opacity: 0.4;
  -webkit-animation-delay: 0.2s; /* Chrome, Safari, Opera */
  animation-delay: 0.63s;  
}

#container .db {
  opacity: 0.3;
  -webkit-animation-delay: 0.3s; /* Chrome, Safari, Opera */
  animation-delay: 0.77s;  
}

#container .ac {
  opacity: 0.2;
  -webkit-animation-delay: 0.2s; /* Chrome, Safari, Opera */
  animation-delay: 0.92s;  
}

#container .bc {
  opacity: 0.1;
  -webkit-animation-delay: 0.3s; /* Chrome, Safari, Opera */
  animation-delay: 1.08s;  
}

#play {
  position: absolute;
  width:0;
  height: 0;
  border-top: 50px solid transparent;
  border-bottom: 50px solid transparent;
  border-left: 115px solid white;
  border-right: 50px solid transparent;
  opacity: 0.2;
  left: 48px;
  top: 50px;
}

.w {
  transform: rotate(270deg)
  translate(100px) rotate(-270deg);
  opacity: 1;
}

.x {
  transform: rotate(280deg)
  translate(100px) rotate(-280deg);
  opacity: 0.9;
}

.y {
  transform: rotate(291deg)
  translate(100px) rotate(-291deg);
  opacity: 0.8;
}

.z {
  transform: rotate(303deg)
  translate(100px) rotate(-303deg);
  opacity: 0.7;
}

.wb {
  transform: rotate(316deg)
  translate(100px) rotate(-316deg);
  opacity: 0.6;
}

.xb {
  transform: rotate(330deg)
  translate(100px) rotate(-330deg);
  opacity: 0.5;
}

.yb {
  transform: rotate(346deg)
  translate(100px) rotate(-346deg);
  opacity: 0.4;
}

.zb {
  transform: rotate(363deg)
  translate(100px) rotate(-363deg);
  opacity: 0.3;
}

.wc {
  transform: rotate(381deg)
  translate(100px) rotate(-381deg);
  opacity: 0.2;
}

.xc {
  transform: rotate(400deg)
  translate(100px) rotate(-400deg);
  opacity: 0.1;
}

@keyframes example {
  100% {
    -ms-transform: rotate(-360deg); /* IE 9 */
    -webkit-transform: rotate(-360deg); /* Safari */
    transform: rotate(-360deg);
  }
}

@keyframes example2a {

  33.3% {
  top:calc( 50% - 10px);
  left:calc(100% - 25px);
  }
  
  
  66.6% {
  top:calc( 100% - 50px);
  left: 30px;
  }  
  
  
  100% {
  top:30px;
  left:30px;
  }
}

<div id=container>
<div class="a1 a"></div><div class="a1 b"></div>
<div class="a1 c"></div><div class="a1 d"></div>
<div class="a1 ab"></div><div class="a1 bb"></div>
<div class="a1 cb"></div><div class="a1 db"></div>
<div class="a1 ac"></div><div class="a1 bc"></div>
<div id=play></div>
<div id=innercontainer>
<div class="a2 w"></div><div class="a2 x"></div>
<div class="a2 y"></div><div class="a2 z"></div>
<div class="a2 wb"></div><div class="a2 xb"></div>
<div class="a2 yb"></div><div class="a2 zb"></div>
<div class="a2 wc"></div><div class="a2 xc"></div>
</div>
</div>