The Ultimate Guide to Lazy Loading in React: 3 Techniques Explained
If you're looking to improve the performance of your React app, lazy loading is a technique that you should definitely consider. Lazy loading allows you to delay the loading of certain components until they are actually needed, which can significantly reduce the initial load time of your app and the amount of data transferred over the network.
In this video, we will cover four different techniques for lazy loading components in React: import on interaction, import on visibility, React.lazy, and route based lazy loading.
We'll start by looking at the import on interaction technique, which involves using the import() function to dynamically import a component when it is needed.
Next, we'll cover the import on visibility technique, which uses the IntersectionObserver API to lazy load components based on their visibility in the viewport.
Then, we'll move on to the React.lazy function, which allows you to wrap a dynamic import in a component that can be rendered like any other component.
We'll provide code examples for each of these techniques, so you can see how they work in practice. By the end of this video, you'll have a solid understanding of how to lazy load components in React and how to choose the right technique for your needs.
References:
"Lazy loading components in React" (https://www.robinwieruch.de/react-laz...)
"Lazy loading in React with the IntersectionObserver API" (https://blog.logrocket.com/lazy-loadi...)
Timestamps:
Introduction: 0:00
Import on interaction: 1:06
Import on visibility: 4:48
React.lazy: 11:40
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