jsx option should be "preserve"

[Fredx87]

In the "Using JSX" section there is this instruction:

Update your tsconfig.json to set "jsx" to "react".

I think that the right value should be "preserve", since the TypeScript documentation says that

The preserve mode will keep the JSX as part of the output to be further consumed by another transform step (e.g. Babel)

If I understand correctly the JSX transformation is not performed by @babel/preset-typescript but by @babel/preset-react, so what is the point to declare a JSX transformation in the tsconfig? Setting preserve can also be useful for supporting the new JSX transform: in the tsconfig we can specify always preserve and let babel decide how to transform the JSX code