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 tag read-only property of the SyncEvent interface returns the developer-defined identifier for this SyncEvent. This is the value passed in the tag parameter of the SyncEvent() constructor.
The developer-defined identifier for this SyncEvent.
| Specification |
|---|
| Web Background Synchronization> # dom-syncevent-tag> |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | WebView on iOS | |
tag |
49 | 79 | No | 36 | No | 49 | No | 36 | No | 5.0 | No | No |
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https://developer.mozilla.org/en-US/docs/Web/API/SyncEvent/tag