The following pieces are not mentioned in the PT-BR version of this article ("Components com estado"): > Stateful components are classes that extend nullstack and are able to hold state that reflects in the ui. > [Events array](https://nullstack.app/stateful-components#events-array) >[Debounced Events](https://nullstack.app/stateful-components#debounced-events) >[TypeScript](https://nullstack.app/stateful-components#typescript) >[Inner components](https://nullstack.app/stateful-components#inner-components) The following are outdated in the PT-BR version: - [Event Context](https://nullstack.app/stateful-components#event-context) section: everything is outdated at "Contexto de Evento" -