FetchEvent.clientId

The clientId read-only property of the FetchEvent interface returns the id of the Client that the current service worker is controlling.

The Clients.get() method could then be passed this ID to retrieve the associated client.

Syntax

var myClientId = fetchEvent.clientId;

Value

A DOMString that represents the client ID.

Example

self.addEventListener('fetch', function(event) {
  console.log(event.clientId);
});

Specifications

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

Browser compatibility

BCD tables only load in the browser

See also