@microsoft/sp-top-actions package

Interfaces

ITopActions	The configurations used to define a webpart's top actions.
ITopActionsButtonProps	TopActions button props.
ITopActionsDropdownOption	TopActions Dropdown option props.
ITopActionsDropdownOptionIconProps	TopActions Dropdown icon props.
ITopActionsDropdownProps	TopActions Dropdown props.
ITopActionsField	Configuration used for a single Top Action command.

Enum for all the supported Top Actions field types.

Names should be consistent with those in office-ui-fabric-react, be careful to get letter casing correct.