About the part of ID Service Methods

[lawlietl]

PhoneGap Plug-in Methods

I am developing with Ionic 3.

Curious on the official description page

Phonegap plugin, part of ID Service Methods

The first question:

visitorSyncIdentifiers, visitorSyncIdentifiersWithAuthenticationState, visitorSyncIdentifierWithType

These three methods are "Synchronizes the provided identifiers with the ID Service."

Which method is better, the difference between these three methods?

The second question:

visitorGetIDs, this method, the value I took out is null, is this normal?

I believe my SDK is working properly. The following picture shows me through the "visitorGetMarketingCloudId" method.

Get the Experience ID correctly.

Thanks for clarifying the issue together.