[08记录] css实现loading动画

codepen.io/hwb2017/pen…

codepen.io/indusy/pen/…

1.第一种

html

<svg id="loading" class="loading" viewBox="0 0 32 32">
<path d="M27.802 5.197c-2.925-3.194-7.13-5.197-11.803-5.197-8.837 0-16 7.163-16 16h3c0-7.18 5.82-13 13-13 3.844 0 7.298 1.669 9.678 4.322l-4.678 4.678h11v-11l-4.198 4.197z"></path>
<path d="M29 16c0 7.18-5.82 13-13 13-3.844 0-7.298-1.669-9.678-4.322l4.678-4.678h-11v11l4.197-4.197c2.925 3.194 7.13 5.197 11.803 5.197 8.837 0 16-7.163 16-16h-3z"></path>
</svg>

css

.loading {
  display: inline-block;
  width: 5em;
  height: 5em;
  stroke-width: 0;
  stroke: currentColor;
  fill: currentColor;
  animation: rotate 2s linear infinite;
}

@keyframes rotate {
  from {
    transform: rotateZ(0deg);
  }
  to {
    transform: rotateZ(360deg);
  }
}

2.第二种

html

<div class="loading-block">
  <div class="loading-part"></div>
  <div class="loading-part"></div>
  <div class="loading-part"></div>
  <div class="loading-part"></div>
  <div class="loading-part"></div>
  <div class="loading-part"></div>
  <div class="loading-part"></div>
  <div class="loading-part"></div>
  <div class="loading-part"></div>
  <div class="loading-part"></div>
  <div class="loading-part"></div>
  <div class="loading-part"></div>
  <div class="loading-part"></div>
</div>

css

body {
  margin: 0;
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.loading-block {
  width: 50px;
  height: 50px;
  position: relative;
  top: 0;
  left: 0;
 }

.loading-part {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
}

.loading-part::after {
  content: '';
  display: block;
  border-radius: 50%;
  width: 10px;
  height: 10px;
  background-color: rgba(0, 0, 0, 0.5);
  transform-origin: center;
}

.loading-part:nth-child(1) {
  transform: rotate(0deg);
}

.loading-part:nth-child(2) {
  transform: rotate(30deg);
}

.loading-part:nth-child(3) {
  transform: rotate(60deg);
}

.loading-part:nth-child(4) {
  transform: rotate(90deg);
}

.loading-part:nth-child(5) {
  transform: rotate(120deg);
}

.loading-part:nth-child(6) {
  transform: rotate(150deg);
}

.loading-part:nth-child(7) {
  transform: rotate(180deg);
}
.loading-part:nth-child(8) {
  transform: rotate(210deg);
}
.loading-part:nth-child(9) {
  transform: rotate(240deg);
}
.loading-part:nth-child(10) {
  transform: rotate(270deg);
}
.loading-part:nth-child(11) {
  transform: rotate(300deg);
}
.loading-part:nth-child(12) {
  transform: rotate(330deg);
}

.loading-part:nth-child(13) {
  transform: rotate(330deg);
  animation: rotating 1s infinite steps(12);
}

.loading-part:nth-child(13)::after {
  background-color: rgba(0, 0, 0, 0.9);
}

@keyframes rotating {
  from {
    transform: rotate(0deg);
  }
  
  to {
    transform: rotate(360deg);
  }
}