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Client

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The Client interface represents an executable context such as a Worker, or a SharedWorker. Window clients are represented by the more-specific WindowClient. You can get Client/WindowClient objects from methods such as Clients.matchAll() and Clients.get().

Client.id Read only: The universally unique identifier of the client as a string.
Client.type Read only: The client's type as a string. It can be "window", "worker", or "sharedworker".
Client.url Read only: The URL of the client as a string.

Specification	Status	Comment
Service Workers The definition of 'Client' in that specification.	Working Draft	Initial definition.

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	40	17	44 44 Service workers (and Push) have been disabled in the Firefox 45 & 52 Extended Support Releases (ESR).	No	27	No
`frameType`	43	17	44 44 Service workers (and Push) have been disabled in the Firefox 45 & 52 Extended Support Releases (ESR).	No	30	No
`id`	40	?	44 44 Service workers (and Push) have been disabled in the Firefox 45 & 52 Extended Support Releases (ESR).	No	27	No
`postMessage`	45	?	44 44 Service workers (and Push) have been disabled in the Firefox 45 & 52 Extended Support Releases (ESR).	No	32	No
`type`	60	?	54	No	47	No
`url`	40	?	44 44 Service workers (and Push) have been disabled in the Firefox 45 & 52 Extended Support Releases (ESR).	No	27	No