SOURCE

<div class="d1 cy-loading" load-tip="正在加载中..."></div>

* {margin: 0}
.d1 {
  width: 100vw;
  height: 100vh;
  position: relative;
}

/* ------------------------------------------- */

.cy-loading::before,
.cy-loading::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 5;
  margin: auto;
}
.cy-loading::before {
  content: attr(load-tip);
  font-size: 13px;
  display: flex;
  justify-content: center;
  align-items: center;
  background: rgba(255, 255, 255, 0.95);
}
.cy-loading::after {
  top: -62px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 1px solid #0f8cd4;
  border-top-color: transparent;
  z-index: 5;
  animation: rotate1t 0.8s linear infinite;
}
@keyframes rotate1t {
  100% {
    transform: rotate(1turn);
  }
}