Client

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().

Methods

Client.postMessage()

Sends a message to the client.

Properties

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.

Specifications

Specification
Service Workers 1
# client-interface

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
Client
40
17
44
Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API.
No
27
11.1
40
40
44
27
11.3
4.0
frameType
43
17
44
Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API.
No
30
11.1
43
43
44
30
11.3
4.0
id
40
17
44
Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API.
No
27
11.1
40
40
44
27
11.3
4.0
postMessage
45
17
44
Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API.
No
32
11.1
45
45
44
32
11.3
5.0
type
60
17
54
No
47
11.1
60
60
54
44
11.3
8.0
url
40
17
44
Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API.
No
27
11.1
40
40
44
27
11.3
4.0

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/Client