element-ui/packages/theme-default/src/loading.css

A Component Library for Vue.js.

.el-loading-spinner {
  height: 12px;
  width: 60px;
  top: 50%;
  left: 50%;
  font-size: 0;
  text-align: center;
  margin-top: -6px;
  margin-left: -30px;
  z-index: 10001;
}

.el-loading-bubble {
  height: 12px;
  width: 12px;
  background-color: #fff;
  margin: 0 3px;
  border-radius: 50%;
  display: inline-block;
  animation: 1s cubic-bezier(.2,.68,.18,1.08) infinite both bubble-pulse;
}

.el-loading-bubble.bubble1 {
  animation-delay: .16s;
}

.el-loading-bubble.bubble2 {
  animation-delay: .32s;
}

.el-loading-bubble.bubble3 {
  animation-delay: .48s;
}

@keyframes bubble-pulse {
  0%, 80% {
    transform: scale(1);
    opacity: 1;
  }
  45% {
    transform: scale(0);
    opacity: 0;
  }
}