SyncEvent: SyncEvent() constructor
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
Note: This feature is only available in Service Workers.
The SyncEvent() constructor creates a new SyncEvent object.
Syntax
js
new SyncEvent(type, options)
Parameters
type-
A string with the name of the event. It is case-sensitive and browsers always set it to
sync. options-
An object that, in addition to the properties defined in
ExtendableEvent(), can have the following properties:tag-
A developer-defined unique identifier for this
SyncEvent. lastChanceOptional-
A boolean value indicating that the user agent will not make further synchronization attempts after the current attempt. It defaults to
false.
Return value
A new SyncEvent object.
Specifications
| Specification |
|---|
| Web Background Synchronization # dom-syncevent-syncevent |