FetchEvent: replacesClientId property
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.
Value
A string.
Examples
js
self.addEventListener("fetch", (event) => {
console.log(event.replacesClientId);
});
Specifications
Specification |
---|
Service Workers # fetch-event-replacesClientId |
Browser compatibility
BCD tables only load in the browser