One easy way to improve the speed of a website is to only download images only when they’re needed, which would be when they enter the viewport. This “lazy loading” technique has been around a while and there are lots of great tutorials on how to implement it. Lazy Loading Images in Svelte
One easy way to improve the speed of a website is to only download images only when they’re needed, which would be when they enter the viewport. This “lazy loading” technique has been around a while and there are lots of great tutorials on how to implement it.
But even with all the resources out there, implementing lazy loading can look different depending on the project you’re working in or the framework you’re using. In this article, I’ll use the Intersection Observer API alongside the
Check out Tristram Tolliday’s introduction to Svelte if you’re new to the framework.
I put this approach together while testing the speed on a Svelte and Sapper application I work on, Shop Ireland. One of our goals is to make the thing as fast as we possible can. We hit a point where the homepage was taking a performance hit because the browser was downloading a bunch of images that weren’t even on the screen, so naturally, we turned to lazy loading them instead.
Svelte is already pretty darn fast because all of the code is compiled in advance. But once we tossed in lazy loading for images, things really started speeding up.
This is what we’re going to work on together. Feel free to grab the final code for this demo from GitHub and read along for an explanation of how it works.
Some require and some are not. But acceleration programs might require you to build one. I’ll tell you how I made a computer program for the competition.
This article will introduce the concepts and topics common to all programming languages, that beginners and experts must know!
In this Svelte tutorial we'll be taking a look at creating a Svelte project using the Svelte template. We'll go over the file structure, install a VS Code extension and look at starting the built-in development server.
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