Fix Service Worker Scheme Guard

Canadian Elite Volleyball Academy — Development Update • April 20, 2026

Fix Service Worker Scheme Guard

What & Why

The service worker's fetch event handler intercepts all GET requests, including those originating from browser extensions ( URLs). When it tries to cache these responses, the Cache API throws a because only and schemes are supported. This produces noisy console errors for every user running a browser extension. A secondary symptom is returning a 503 because it isn't in the cache and the service worker returns its error fallback.

Done looks like

• No scheme errors appear in the browser console
• no longer returns 503
• The service worker still caches normal / requests as before

Out of scope

• Changes to caching strategy or cache versioning
• Push notification or offline behaviour changes

Steps

1. Add a URL scheme guard — At the very top of the event handler (before any other logic), add a check that returns early if the request URL does not start with . This prevents the handler from touching , , or any other unsupported scheme. 2. Sync the dist copy — Apply the same change to so the built output matches.

Relevant files

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Canadian Elite Volleyball Academy
elitevolleyball.training