Cloudflare Worker for subscribing to a browser push notification when an HTML page's content changes. You can see the live version at push-page-diff.pjsier.workers.dev.

Includes workarounds for customizing a webpack build in a Cloudflare Worker using Rust. Also includes a WASM-compatible setup for web push authentication and encryption.

You'll need Rust, node.js, and wrangler installed. You'll need to replace the account-specific values in wrangler.toml with your own. Install dependencies with:

npm install

Then you'll need to generate keys for VAPID authentication by running:

npm run keys

Then copy .env.sample to .env and fill in the output values for VAPID_PUBLIC_KEY and VAPID_PRIVATE_KEY. VAPID_SUBJECT should be a mailto: link to an email of your choice.

Run the worker locally at localhost:8787 with:

wrangler dev