If you've ever built a website that involves lazy loading images or infinite scrolling, you might have experienced some performance issues that can slow down your website. This is where the Intersection Observer API comes in. The Intersection Observer API is a powerful tool that allows you to efficiently monitor when an element enters or exits the viewport, without the need for costly and inefficient polling methods.
In this series of multiple articles, we'll cover everything you need to know about the Intersection Observer API in JavaScript, including how it works, its benefits, and how to use it in your projects. By the end of this series of articles, you'll have a solid understanding of how to use this API to optimize the performance of your web applications and how to implement it in JavaScript frameworks like Vue and Svelte.
Part 1. Intersection observer is a hidden feature of JavaScript. We will discuss everything you need to know about the Intersection observer API in JavaScript, with some examples of how and when to use it. We'll discuss different options that you can apply to customize it for your needs.
Part 2. Vue component wrapper for Lazy loading. We will learn how to use Intersection observer to Lazy load components, and you will see how useful the Composition API can be. It's not only going to improve the performance of your app, but also make it look better.
Part 3. Boost your Svelte app's performance. Where we will build a Lazy Loading component in Svelte that uses the Composition API to improve the performance and page loading speed. We'll make this component reusable so that you can reuse it anywhere in your application.