infojune/resources/sass/materialize/sass/components/_transitions.scss

// Scale transition
.scale-transition {
  &.scale-out {
    transform: scale(0);
    transition: transform .2s !important;
  }

  &.scale-in {
    transform: scale(1);
  }

  transition: transform .3s cubic-bezier(0.53, 0.01, 0.36, 1.63) !important;
}