The replacesClientId
read-only property of the FetchEvent
interface is the id
of the client
that is being replaced during a page navigation.
For example, when navigating from page A to page B replacesClientId
is the ID of the client associated with page A. It can be an empty string when navigating from about:blank
to another page, as about:blank
's client will be reused, rather than be replaced.
Additionally, if the fetch isn't a navigation, replacesClientId
will be an empty string. This could be used to access/communicate with a client that will imminently be replaced, right before a navigation.
Syntax
var myReplacedClientId = fetchEvent.replacesClientId;
Value
A DOMString
.
Example
self.addEventListener('fetch', function(event) { console.log(event.replacesClientId); });
Specifications
Specification | Status | Comment |
---|---|---|
Service Workers The definition of 'replacesClientId' in that specification. |
Working Draft | Initial definition. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
replacesClientId | Chrome No support No | Edge No support 18 — 79 | Firefox Full support 65 | IE No support No | Opera No support No | Safari No support No | WebView Android No support No | Chrome Android No support No | Firefox Android Full support 65 | Opera Android No support No | Safari iOS No support No | Samsung Internet Android No support No |
Legend
- Full support
- Full support
- No support
- No support