Valid Flow fails

[vmx]

According to the website Flow is supported. But this example:

// @flow
const planets = {
  earth: 12756,
  mars: 6792
}
type Planet = $Keys<typeof planets>
const planet: Planet = 'mars'
return planet

fails with:

$ npx standard --parser babel-eslint --plugin flowtype minimal.js
standard: Use JavaScript Standard Style (https://standardjs.com)
  /home/vmx/tmp/eslintflow/minimal.js:6:15: '$Keys' is not defined.

The rule flowtype/define-flow-type would solve the problem. But if you would add this rule to eslint-config-standard'a eslintrc.json it would error if you run standard withoutt the --plugin flowtype.

Is there a way to resolve this problem that would be accepted? I'd be happy to work on a PR.

[vmx]

After having a closer look. What about making standard to do an "extends": "plugin:flowtype/recommended" if the flowtype plugin is specified?

Would such a change be accepted.

[feross]

@vmx It's intentionally not easy to enable additional rules in standard, though in certain situations like yours, this can cause some trouble.

In the meantime, I recommend using standardx which provides an escape-hatch of sorts for these types of situations. It allows you enable additional rules.

Eventually, I'd like to solve this problem more elegantly in a future version of standard.