Optimizing React Apps with Intersection Observer API || Lazy loading images || Hindi
Code: https://github.com/codingscenes/react...
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The Intersection Observer API is a JavaScript feature that helps you track and respond to elements on a webpage entering or leaving the viewport, which is the visible portion of the browser window. In simpler terms, it allows you to detect when an element becomes visible or hidden as you scroll through a webpage.
Imagine you have a long webpage with various sections or images. With the Intersection Observer API, you can set up a "watcher" that keeps an eye on these elements. As you scroll, the watcher will notify you when a particular element comes into view or goes out of view.
This API is useful for a variety of scenarios. For example, you could use it to implement lazy loading, where images are loaded only when they are about to become visible, saving bandwidth and improving page loading speed. You could also trigger animations or other actions when specific elements enter or leave the viewport, providing a more interactive and dynamic user experience.
In summary, the Intersection Observer API provides a way to monitor when elements become visible or hidden on a webpage, enabling you to create engaging and efficient web experiences.
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=========Timestamps=============
00:00:00 Intro
00:01:39 Ways for lazy loading
00:02:20 Effect of Lazy Loading
00:03:11 Understanding Intersection Observer API
00:07:50 Implementing Lazy Loading in React App