Slide.vue

<template>
    <div class="slide">
        slide
    </div>
</template>

<script>
export default {
    methods: {
        transitionIn() {
            const timeline = new gsap.timeline();

            timeline.to(this.$el, 1, { alpha: 1 });

            return timeline;
        },

        transitionOut() {
            const timeline = new gsap.timeline();

            timeline.to(this.$el, 1, { alpha: 0 });

            return timeline;
        },
    }
}
</script>