React + Typescript: Type of React component with no state/no props

Question

I\'ve seen multiple examples of React components using Typescript:

class Foo extends React.Component {}

It seems there is no a

Answer 1

According to this guideline and my exp, I would say :

1. class Foo extends React.Component {} when you know you will not recieve props nor state
2. class Foo extends React.Component {} when you know you will recieve props and state but you really don't care what they look like
3. class Foo extends React.Component<{}, {}> {} never saw, seems strange
4. class Foo extends React.Component {} same as null, it's up to you. I see more often null than undefined
5. class Foo extends React.Component {} bad idea, since seems to be reserved for functions return (when you do not expect one)

Other opinions are welcomed