ant-design-vue/components/trigger/assets/index.less

@triggerPrefixCls: rc-trigger-popup;
.fade-enter-active, .fade-leave-active {
  transition: opacity 0.5s;
}
.fade-enter, .fade-leave-to /* .fade-leave-active in below version 2.1.8 */ {
  opacity: 0;
}
.@{triggerPrefixCls} {
  position: absolute;
  left: -9999px;
  top: -9999px;
  z-index: 1050;

  &-hidden {
    display: none;
  }

  .effect() {
    animation-duration: 0.3s;
    animation-fill-mode: both;
  }

  &-zoom-enter,&-zoom-appear {
    opacity: 0;
    .effect();
    animation-timing-function: cubic-bezier(0.18, 0.89, 0.32, 1.28);
    animation-play-state: paused;
  }

  &-zoom-leave {
    .effect();
    animation-timing-function: cubic-bezier(0.6, -0.3, 0.74, 0.05);
    animation-play-state: paused;
  }

  &-zoom-enter&-zoom-enter-active, &-zoom-appear&-zoom-appear-active {
    animation-name: rcTriggerZoomIn;
    animation-play-state: running;
  }

  &-zoom-leave&-zoom-leave-active {
    animation-name: rcTriggerZoomOut;
    animation-play-state: running;
  }

  @keyframes rcTriggerZoomIn {
    0% {
      opacity: 0;
      transform-origin: 50% 50%;
      transform: scale(0, 0);
    }
    100% {
      opacity: 1;
      transform-origin: 50% 50%;
      transform: scale(1, 1);
    }
  }
  @keyframes rcTriggerZoomOut {
    0% {
      opacity: 1;
      transform-origin: 50% 50%;
      transform: scale(1, 1);
    }
    100% {
      opacity: 0;
      transform-origin: 50% 50%;
      transform: scale(0, 0);
    }
  }
}

@import "./mask";