vue-vben-admin/src/design/transition/fade.less

.fade-enter-active,
.fade-leave-active {
  transition: opacity 0.2s ease-in-out;
}

.fade-enter-from,
.fade-leave-to {
  opacity: 0;
}

// side-fade
.slide-fade-enter-active,
.slide-fade-leave-active {
  transition: opacity 0.3s, transform 0.35s;
}

.slide-enter-from,
.slide-fade-enter {
  opacity: 0;
  transform: translateX(-30%);
}

.slide-fade-leave-to {
  opacity: 0;
  transform: translateX(30%);
}

// ///////////////////////////////////////////////
// Fade Bottom
// ///////////////////////////////////////////////

// Speed: 1x
.fade-bottom-enter-active,
.fade-bottom-leave-active {
  transition: opacity 0.2s, transform 0.25s;
}

.fade-bottom-enter-from,
.fade-bottom-enter {
  opacity: 0;
  transform: translateY(-8%);
}

.fade-bottom-leave-to {
  opacity: 0;
  transform: translateY(8%);
}

// ///////////////////////////////////////////////
// Fade Top
// ///////////////////////////////////////////////

// Speed: 1x
.fade-top-enter-active,
.fade-top-leave-active {
  transition: opacity 0.2s, transform 0.25s;
}

.fade-top-enter-from {
  opacity: 0;
  transform: translateY(8%);
}

.fade-top-leave-to {
  opacity: 0;
  transform: translateY(-8%);
}