[jsx-filename-extension]: option to allow empty files

[silverwind]

Given the config

rules:
  react/jsx-filename-extension: [2, {allow: as-needed]}]

a file that is empty or contains only comments triggers the rule, for example a .jsx file with:

// Put your components here

I think a option to allow empty files when as-needed is specified would be ideal for this use case, not sure whether it should be the default, but I think it could be.

[ljharb]

Why? That would mean that as soon as you add code to it, you might get an error that forces you to rename it.

[silverwind]

The intention is that this empty file serves as a placeholder and is populated with JSX content later. If the user adds only non-JSX content, the error is justified and the file must be renamed.

[ljharb]

ohhh, i see - you want it to be .jsx but the rule is saying it's not needed and warning on it?

[silverwind]

Yes exactly. A empty file is kind of an edge case for such on-demand .jsx extension.

[ljharb]

then yes, i think an additional option that ignores empty files would be reasonable.

[silverwind]

Okay, maybe I'll look into implementing it if it's not too hard.