In C++ I did it like this, but how do I accomplish the same thing in JavaScript?
#.h
UStaticMeshComponent* CardComp;
UStaticMesh* CardSM;
#.cpp
static ConstructorHelpers::FObjectFinder<UStaticMesh> StaticMeshObj(TEXT("StaticMesh'/Game/Assets/Meshes/SM_Card_02.SM_Card_02'"));
CardSM = StaticMeshObj.Object;
CardComp = ObjectInitializer.CreateDefaultSubobject < UStaticMeshComponent >(this, TEXT("CardComp1"));
CardComp->SetStaticMesh(CardSM);
CardComp->AttachSocketName = FName(TEXT("TheCardComp"));
RootComponent = CardComp;