Web/API/SyncEvent/SyncEvent

Non-standard This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The SyncEvent() constructor creates a new SyncEvent object.

Syntax

var mySyncEvent = new SyncEvent(type, init)

Parameters

type

The type of the Event.

init Optional

An options object containing any custom settings that you want to apply to the event object. Options are as follows:

tag

• A developer-defined unique identifier for this SyncEvent.
• lastChance: A Boolean indicating that the user agent will not make further synchronization attempts after the current attempt.

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.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
SyncEvent() constructor Experimental'Non-standard'	Chrome Full support 49	Edge Full support ≤79	Firefox ?	IE No support No	Opera ?	Safari ?	WebView Android No support No	Chrome Android Full support 49	Firefox Android ?	Opera Android ?	Safari iOS ?	Samsung Internet Android Full support 5.0

Legend

Full support  

Full support

No support  

No support

Compatibility unknown  

Compatibility unknown

Experimental. Expect behavior to change in the future.'

Experimental. Expect behavior to change in the future.

Non-standard. Expect poor cross-browser support.'

Non-standard. Expect poor cross-browser support.

SyncEvent.SyncEvent() by Mozilla Contributors is licensed under CC-BY-SA 2.5.