Warn in dev mode for methods/props missing an @api

[nolanlawson]

export default class extends LightningElement {
  get foo () { return 'foo' }
}

console.log(elm.foo) // undefined

This logs undefined because the class is missing an @api on the get foo(). It would be great to have a dev-only warning to provide a hint that the component author has forgotten to add an @api.

[yashpatel1998]

@nolanlawson Can I grab this issue?

[nolanlawson]

@yashpatel1998 Sure thing! 😀

[AllanOricil]

@yashpatel1998 I tried this one because it is in the list I asked #3700