Definition
Service Workers Nightly defines Clients
[Exposed=ServiceWorker]
interface Clients {
// The objects returned will be new instances every time
[NewObject] Promise<(Client or undefined)> get(DOMString id);
[NewObject] Promise<FrozenArray<Client>> matchAll(optional ClientQueryOptions options = {});
[NewObject] Promise<WindowClient?> openWindow(USVString url);
[NewObject] Promise<undefined> claim();
};