☁️ Using Netlify Functions with SvelteKit
Why would you want to be using Netlify Functions with SvelteKit instead of the inbuilt SvelteKit functionality? Like NextJS from the React world SvelteKit supports server side rendering as well as server side routes from which you can run your server side code. There are a couple of reasons that come to mind for using Netlify functions with SvelteKit though. Firstly, if you are migrating your site from another platform and have existing Netlify functions, you can speed up the migration by transplanting over the existing Netlify functions.
The good news is (as we will see in a moment) that besides a couple of configuration files, you don't need much to get your Netlify functions working in tandem with SvelteKit.
🧑🏽🎓 How to Get Started Using Netlify Functions with SvelteKit
We'll look at these three steps in turn which will get you using Netlify Functions with SvelteKit in no time:
netlify.toml Config File
netlify.toml file in the root directory of your project and add the following content:
Probably the most important part here is specifying the directory where we will put the Netlify functions (
🔌 Netlify Adapter
Svelte has build adapters which help customise your site build for your hosting platform. This is exactly what the Netlify adapter does . Part of its work is to convert any server endpoints to Netlify functions. This means your build app will have a render function (generated by the adapter) as well as any Netlify functions you define yourself.
The SvelteKit adapters are still evolving. As such, current best practice is to choose the
next version, which you can install with pnpm, npm or yarn:
On top, you will need to let SvelteKit know that you want it to use this adapter:
Import the adapter to your
svelte.config.js file (line
2) and then set it as SvelteKit's adapter (line
🖥 The Netlify Functions
Next you can create the
💯 Testing it out
In the Netlify tradition, configuration and boilerplate are kept to a minimum. To get these functions running, you should just need to commit these changes to your git repository, and deploy as normal. To test the
client-ip function, you need to point your browser to the
/.netlify/functions/client-ip route (see the working example here: sveltekit-netlify-functions.rodneylab.com/.netlify/functions/client-ip ). Similarly for the
good-morning function, point your browser to
/.netlify/functions/good-morning. Again, there is a live test site at sveltekit-netlify-functions.rodneylab.com/.netlify/functions/good-morning .
I have also created a full working repo on the Rodney Lab GitHub page .
In this post we saw:
why you might want to use Netlify functions with SvelteKit,
how to configure a Netlify SvelteKit build,
how to add Netlify functions to your SvelteKit app.
This post came from a question left in a comment. So if this post spurs further questions, please do drop a comment below and I might be able to create more content in response.
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