patricknelson / svelte-ssr-service-worker

A quick demo for rendering Svelte server-side (SSR), but within a Cloudflare Worker!

svelte-ssr-service-worker (SWSR)

A quick demo for rendering Svelte via Service Worker Side Rendering (SWSR). Like SSR (Server Side Rendering) but within a Service Worker!

This is a demo meant to illustrate how to get Svelte SSR in a Service Worker. It is intentionally very minimal. It is a fork of svelte-ssr-worker and lightly modified for Service Workers. Svelte and Rollup are a bit out of date in this PoC and new projects shouldn't use this as a starting point.

Install

$ git clone https://github.com/patricknelson/svelte-ssr-service-worker
$ cd svelte-ssr-service-worker
$ npm install

Scripts

The following are npm scripts included in the project.
They are invoked via npm run <name> on the command line; for example: npm run build:dom.

build

This is an alias for sequentially running the build:dom and build:service-worker scripts.

Note: These are sequential because build:service-worker imports the public/index.html that build:dom produces.

build:dom

Builds the client for production, using the src/index.dom.js entry point.

All files within the /public directory comprise your front-end client application.

build:service-worker

Builds your Service Worker code, using the src/index.service-worker.js entry point. The final worker file is saved to public/build/bundle.service-worker.js.

Important: This script must run after build:dom because it relies on its public/index.html output.

It's loaded via the DOM code (in bundle.js) via:

if ('serviceWorker' in navigator) {
	navigator.serviceWorker.register('build/bundle.service-worker.js');
}

start

Starts a local development server.
This is used to preview/visit your front-end application only.

Note: This does not run your Worker code.

watch

This is an alias for running the start and watch:dom scripts simultaneously.

watch:dom

Watches your src/index.dom.js and its imports for changes.

watch:service-worker

Watches your src/index.service-worker.js and its imports for changes.

Deploy

You should have a storage bucket setup and attached to a CDN ahead of time.
Once the CDN address is known, you will need to update the {{CDN}} value within config/shared.js.

Then, after a successful build, you will need to:

• Upload public/* to your storage bucket (or similar)
• Upload build/index.js to Cloudflare Workers

Note: Cloudflare's wrangler can handle both of these steps!

You're done~! 🎉

License

MIT © Luke Edwards