Beta@minecraft/server-uiThe @minecraft/server-ui module contains types for expressing simple dialog-based user experiences.
@minecraft/server-ui.ActionFormData contain a list of buttons with captions and images that can be used for presenting a set of options to a player.
@minecraft/server-ui.MessageFormData are simple two-button message experiences that are functional for Yes/No or OK/Cancel questions.
@minecraft/server-ui.ModalFormData allow for a more flexible "questionnaire-style" list of controls that can be used to take input.
See full documentation for this module here: