Clarity around "is a service worker client"

[mfalken]

The spec has some occurrences of "is a service worker client".

Note that document, dedicated workers, and shared workers are always service worker clients, even if there is no service worker registration they are under (see https://w3c.github.io/ServiceWorker/#control-and-use-window-client and https://w3c.github.io/ServiceWorker/#control-and-use-worker-client for when service worker clients are created).

Is this intended, or does the spec mean something like: "if the service worker client's active service worker is not null"?

[marcoscaceres]

I'm also thinking the spec shouldn't talk about "service workers". The API is either in a Window or WorkerGlobalScope... but I'm not sure that there is anything that inherently ties the API to a service worker.