What are some examples of using Intersection Observer in Vue.js?

What are some examples of using Intersection Observer in Vue.js?

The Intersection Observer API allows you to asynchronously observe changes in the intersection of a target element with an ancestor element or with a top-level document's viewport. In Vue.js, you can use it to implement lazy loading, infinite scrolling, and more. Would you like to see a specific example?

Yes, can you show me a lazy loading example?

Sure! Here's a simple example of lazy loading images using Intersection Observer in Vue.js:

<template>
  <div>
    <img v-if="isVisible" :src="imageSrc" alt="Lazy Loaded Image" />
  </div>
</template>

<script>
export default {
  data() {
    return {
      isVisible: false,
      imageSrc: 'path/to/image.jpg',
    };
  },
  mounted() {
    const observer = new IntersectionObserver((entries) => {
      entries.forEach(entry => {
        if (entry.isIntersecting) {
          this.isVisible = true;
          observer.unobserve(entry.target);
        }
      });
    });
    observer.observe(this.$el);
  },
};
</script>

This code will load the image only when it comes into the viewport.

That looks great! Can I use it for infinite scrolling?

Absolutely! You can modify the observer to trigger a function that loads more content when the user scrolls to the bottom of the page. Would you like a code example for that?