USTRUCT and UCLASS

You can declare USTRUCT and UCLASS while your javascript is running.

// NOTE: Struct flag is *required* for 'USTRUCT'.
class YourStructName /* Struct+StructFlag+StructFlag+... */ extends BaseStruct {
   properties() {
     property-declarations
   }
}

class YourClassName /* ClassFlag+ClassFlag+... */ extends ParentClass {
   ctor() {
     // initialization
     // component setup
   }
   properties() {
     property-declarations
   }
   YourUFunctionName(arg/*PropertyFlag+...*/) /*FunctionFlag+...*/ {
   }
   YourPureJavascriptFunctionName(arg,...) {
   }
}

These classes should be transformed into corresponding USTRUCT and UCLASS by calling require('uclass')()(global, source-class).

StructFlag	Description
Atomic
Immutable

ClassFlag	Description
Abstract
DefaultConfig
Transient
AdvancedDisplay
NotPlaceable
PerObjectConfig
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Const
DefaultToInstanced
Hidden
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BlueprintType
BlueprintSpawnableComponent