How can I implement animations on scroll in Vue.js?

How can I implement animations on scroll in Vue.js?

You can use the Intersection Observer API along with Vue.js to trigger animations when elements come into view.

Can you provide a code example for that?

Sure! Here's a simple example:

<template>
  <div v-for="item in items" :key="item.id" ref="itemRefs">
    <div class="fade-in" v-if="isVisible(item.id)">{{ item.content }}</div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      items: [...],
      visibleItems: new Set(),
    };
  },
  methods: {
    isVisible(id) {
      return this.visibleItems.has(id);
    },
    observeItems() {
      const observer = new IntersectionObserver((entries) => {
        entries.forEach(entry => {
          if (entry.isIntersecting) {
            this.visibleItems.add(entry.target.id);
            observer.unobserve(entry.target);
          }
        });
      });
      this.$refs.itemRefs.forEach(item => observer.observe(item));
    },
  },
  mounted() {
    this.observeItems();
  },
};

This code will fade in items as they come into view.

What CSS styles should I use for the fade-in effect?

You can use the following CSS for a simple fade-in effect:

.fade-in {
  opacity: 0;
  transition: opacity 0.5s ease-in;
}
.fade-in.is-visible {
  opacity: 1;
}

Make sure to add the is-visible class when the item becomes visible.