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How should I handle multiple DmlException messages when using AuraHandledException

I cannot find the defacto solution or framework best practice for handling what must be a common scenario.

How should I handle multiple DmlException messages when using AuraHandledException inside an Apex Controller.

I cannot find the defacto solution or framework best practice for handling what must be a common scenario.

Ideally, I'd like a solution which can be used in the Apex controller.

How should I handle multiple DmlException messages using AuraHandledException

How should I handle multiple DmlException messages when using AuraHandledException

1. Is there a capability built into the Lightning framework to handle multiple DmlException's?
2. Should the JavaScript handle the DmlException rethrow differently?
3. Do I need to write some custom Apex or JavaScript to handle multiple DmlException's?

1. Is there a capability built into the Lightning framework to handle multiple DmlException's?
2. Should the JavaScript handle the DmlException rethrow differently?
3. Do I need to write some custom Apex to handle multiple DmlException's?