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?

Comienza con la documentación existente de uncontrolled-components.html y la discusión enlazada. Resuelve si los controlled, uncontrolled y mixed component patterns pertenecen a esa página o a una página separada, y determina qué orientación debe proporcionar la documentación. Se considera terminado cuando la documentación seleccionada cubre claramente el patrón más allá de los formularios y responde a las preguntas abiertas sobre el alcance.