SyncManager.register()

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 SyncManager.register method of the SyncManager interface returns a Promise that resolves to a SyncRegistration instance.

Syntax

SyncManager.register([options]).then(function(syncRegistration) { ... })

Returns

A Promise that resolves to an instance of SyncRegistration.

Parameters

options Optional

An object that sets options for an instance of SyncRegistration. The available options are:

allowOnBattery: A boolean that determines whether synchronization is allowed when the user agent is on a battery-powered device. The default is true.
id: The unique identifier of the specified SyncRegistration object.
idleRequired: A boolean that determines whether synchronization is allowed when the user agent's device is idle. The default is false.
maxDelay: The maximum delay in milliseconds before the next sync event (or the first sync event if it is periodic). The default is 0, meaning there is no maximum delay.
minDelay: The minimum delay in milliseconds before the next sync event (or the first sync event if it is periodic). The default is 0.
minPeriod: The minimum time in milliseconds between periodic sync events. The default is 0, meaning events are not periodic.
minRequiredNetwork: The network condition under which background synchronization will occur. Valid values are 'network-any', 'network-offline', 'network-online', 'network-non-mobile'. The default value is 'network-online'.

Browser compatibility

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
`register` ExperimentalNon-standard	Chrome Full support 49	Edge No support No	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android Full support 49	Chrome Android Full support 49	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support 5.0

Legend

Full support: Full support
No support: No support
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.