The plain-English version
A browser-managed worker that can handle specified events and participate in requests within its scope.
Why it matters
It can support offline behavior and controlled caching, while introducing a separate update lifecycle.
Let’s make it click
A reading app serves a previously cached article when the connection is unavailable.
Vibe Bro’s heads-up
A registered worker does not make every feature work offline; data, writes, and cache freshness still need policies.
The docs behind it
Documentation links checked .
Editorial review · October 28, 2026
Supported: MDN supports scoped interception, caching, and lifecycle/update concerns. The entry correctly rejects automatic offline support for every feature.