Creates a storage-backed fetch handler for service workers and fetch-event
integrations. The host owns URL matching; the SDK only turns a matched,
credential-free resource identity into a response.
A miss, unsupported method, or expired region returns undefined, allowing
the host to continue its normal network fallback. Storage failures are
propagated so a host can distinguish them from an ordinary cache miss.
Creates a storage-backed fetch handler for service workers and fetch-event integrations. The host owns URL matching; the SDK only turns a matched, credential-free resource identity into a response.
A miss, unsupported method, or expired region returns
undefined, allowing the host to continue its normal network fallback. Storage failures are propagated so a host can distinguish them from an ordinary cache miss.