The FetchEvent()
constructor creates a new FetchEvent
object.
The FetchEvent()
constructor creates a new FetchEvent
object.
js
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.
Specification |
---|
Service Workers # dom-fetchevent-fetchevent |
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
FetchEvent |
44 | 17 | 44 | No | 31 | 11.1 | 44 | 44 | 44 | 32 | 11.3 | 4.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/FetchEvent/FetchEvent