amis/packages/amis-ui/scss/components/_spinner.scss

@keyframes rotate {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(359deg);
  }
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(1turn);
  }
}

.#{$ns}Spinner {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: ease-out opacity var(--animation-duration);

  &.in {
    opacity: 1;
  }

  .#{$ns}Spinner-icon {
    width: var(--Spinner-width);
    height: var(--Spinner-height);
    position: relative;
    transform: translateZ(0);
    animation: spin 2s linear infinite;
    transition: ease-out all var(--animation-duration);

    &--default {
      background: var(--Spinner-bg);
      background-size: 100%;
      animation: none;
    }

    &--simple {
      background: transparent;
      display: flex;
      align-items: center;
      justify-content: center;

      .icon {
        width: 100%;
        height: 100%;
        color: var(--Spinner-color);
      }

      svg.icon {
        top: 0;

        path {
          fill: var(--Spinner-color);
        }
      }

      i.icon {
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: var(--Spinner-width);
      }
    }

    &--custom {
      width: auto;
      height: auto;
    }

    &--lg {
      width: var(--Spinner--lg-width);
      height: var(--Spinner--lg-height);

      i.icon {
        font-size: var(--Spinner--lg-height);
      }
    }

    &--sm {
      width: var(--Spinner--sm-width);
      height: var(--Spinner--sm-height);

      i.icon {
        font-size: var(--Spinner--sm-height);
      }
    }
  }

  .#{$ns}Spinner-tip {
    margin: px2rem(12px) 0 0 0;
    word-break: keep-all;
    white-space: nowrap;
    color: var(--Spinner-color);
  }

  &.#{$ns}Spinner-tip--top {
    flex-direction: column-reverse;

    .#{$ns}Spinner-tip {
      margin: 0 0 px2rem(12px) 0;
    }
  }

  &.#{$ns}Spinner-tip--right {
    flex-direction: row;

    .#{$ns}Spinner-tip {
      margin: 0 0 0 px2rem(12px);
    }
  }

  &.#{$ns}Spinner-tip--bottom {
    flex-direction: column;

    .#{$ns}Spinner-tip {
      margin: px2rem(12px) 0 0 0;
    }
  }

  &.#{$ns}Spinner-tip--left {
    flex-direction: row-reverse;

    .#{$ns}Spinner-tip {
      margin: 0 px2rem(12px) 0 0;
    }
  }

  &--overlay {
    position: absolute;
    z-index: 11;
    top: 50%;
    left: 50%;
    transform: translate3d(-50%, -50%, 0);
  }
}

.#{$ns}Spinner-overlay {
  position: absolute;
  z-index: 10;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--Spinner-overlay-bg);
  transition: ease-out opacity var(--animation-duration);
  opacity: 0;

  &.in {
    opacity: 1;
  }
}

// spinner渲染器scss
.#{$ns}Spinner-wrap {
  position: relative;
  width: 100%;
  height: 100%;

  .#{$ns}Spinner {
    position: absolute;
    z-index: 11;
    top: 50%;
    left: 50%;
    transform: translate3d(-50%, -50%, 0);
  }
}