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.
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.
A string that represents the client ID.
js
self.addEventListener("fetch", (event) => { console.log(event.clientId); });
| Specification |
|---|
| Service Workers # fetch-event-clientid |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
clientId |
49 | 17 | 45 | No | 36 | 11.1 | 49 | 49 | 45 | 36 | 11.3 | 5.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/FetchEvent/clientId