Document Controlled vs Uncontrolled Component Design pattern

pursuant to this discussion https://twitter.com/dan_abramov/status/1001943857096003584

all react components can be:

• controlled (no internal state)
• uncontrolled (internal state)
• mixed (uncontrolled by default, unless some props are passed to make it controlled)

the current docs on controlled vs uncontrolled: https://reactjs.org/docs/uncontrolled-components.html focus entirely on forms, but this design pattern applies to -all- components. we should document this.

questions

1. What else should we say in the docs?
2. do we want to tell people that they can do "mixed control" or do we leave that for people to discover for themselves?
3. is this the same page as https://reactjs.org/docs/uncontrolled-components.html or is it a separate page?

Comece pela documentação existente de uncontrolled-components.html e pela discussão vinculada. Resolva se os controlled, uncontrolled e mixed component patterns devem pertencer a esta página ou a uma página separada, e determine quais orientações a documentação deve fornecer. O trabalho estará concluído quando a documentação selecionada cobrir claramente o pattern para além de formulários e responder às questões em aberto sobre o escopo.