react-toastify/scss/animations/_slide.scss

@mixin transform {
    transform: translate3d(0, 0, 0);
}

@keyframes #{$rt-namespace}__slideInRight {
    from {
        transform: translate3d(110%, 0, 0);
        visibility: visible;
    }
    to {
        @include transform;
    }
}

@keyframes #{$rt-namespace}__slideInLeft {
    from {
        transform: translate3d(-110%, 0, 0);
        visibility: visible;
    }
    to {
        @include transform;
    }
}

@keyframes #{$rt-namespace}__slideInUp {
    from {
        transform: translate3d(0, 110%, 0);
        visibility: visible;
    }
    to {
        @include transform;
    }
}

@keyframes #{$rt-namespace}__slideInDown {
    from {
        transform: translate3d(0, -110%, 0);
        visibility: visible;
    }
    to {
        @include transform;
    }
}

@keyframes #{$rt-namespace}__slideOutRight {
    from {
        @include transform;
    }
    to {
        visibility: hidden;
        transform: translate3d(110%, 0, 0);
    }
}

@keyframes #{$rt-namespace}__slideOutLeft {
    from {
        @include transform;
    }
    to {
        visibility: hidden;
        transform: translate3d(-110%, 0, 0);
    }
}

@keyframes #{$rt-namespace}__slideOutDown {
    from {
        @include transform;
    }
    to {
        visibility: hidden;
        transform: translate3d(0, 500px, 0);
    }
}

@keyframes #{$rt-namespace}__slideOutUp {
    from {
        @include transform;
    }
    to {
        visibility: hidden;
        transform: translate3d(0, -500px, 0);
    }
}

.#{$rt-namespace}__slide-enter {
    &--top-left,
    &--bottom-left {
        animation-name: #{$rt-namespace}__slideInLeft;
    }
    &--top-right,
    &--bottom-right {
        animation-name: #{$rt-namespace}__slideInRight;
    }
    &--top-center {
        animation-name: #{$rt-namespace}__slideInDown;
    }
    &--bottom-center {
        animation-name: #{$rt-namespace}__slideInUp;
    }
}

.#{$rt-namespace}__slide-exit {
    &--top-left,
    &--bottom-left {
        animation-name: #{$rt-namespace}__slideOutLeft;
    }
    &--top-right,
    &--bottom-right {
        animation-name: #{$rt-namespace}__slideOutRight;
    }
    &--top-center {
        animation-name: #{$rt-namespace}__slideOutUp;
    }
    &--bottom-center {
        animation-name: #{$rt-namespace}__slideOutDown;
    }
}