Return null as JSX element (no-null with React + TS)

Is necessary return null for a JSX Element

If use undefined TS return an error

Its return type 'Element | undefined' is not a valid JSX element.
Type 'undefined' is not assignable to type 'Element | null'.

Maybe enable null for a JSX return fix the bug.

[Torhal]

Or possibly return an empty React.Fragment. I do that instead of using null.

return isLoading
    ? <></> 
    : (
            /* ... */
       )

[sindresorhus]

We could maybe ignore reporting on null when in a JSX context or something.