Baseline Widely available
Note: This feature is only available in Service Workers.
The FetchEvent() constructor creates a new FetchEvent object.
new FetchEvent(type, options)
type
A string with the name of the event. It is case-sensitive and browsers always set it to fetch.
options
An object that, in addition of the properties defined in ExtendableEvent(), can have the following properties:
request
The Request object that would have triggered the event handler.
preloadResponse
A Promise which returns a previously-loaded response to the client.
clientId Optional
The Client that the current service worker is controlling. It defaults to "".
isReload Deprecated Optional
A boolean value that signifies whether the page was reloaded or not when the event was dispatched. true if yes, and false if not. Typically, pressing the refresh button in a browser is a reload, while clicking a link and pressing the back button is not. If not present, it defaults to false.
replacesClientId Optional
A string which identifies the client which is being replaced by resultingClientId. It defaults to "".
resultingClientId Optional
A string containing the new clientId if the client changes as a result of the page load. It defaults to ""
handled
A pending promise that will be fulfilled once the event has been handled.
A new FetchEvent object.
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