Json schema key can only be string

[tonyxiao]

{
  $schema: 'http://json-schema.org/schema#',
  type: 'object',
  additionalProperties: true,
}

Currently gets converted into

export type = { [key: any]: any;
};

However, in reality json keys can ONLY be string. So the correct type should be

export type = { [key: string]: any;
};

[dannynelson]

Thanks for the feedback, @tonyxiao.

You are correct that JSON keys (and all javascript keys) are strings. On the other hand, since javascript coerces keys to strings, a key of any type becomes valid JSON. For example:

type Obj = {[key: string]: any};
const obj: Obj = {'3': 'test'};
console.log(obj[3]); // coerced into "3" and returns "test", but flow errors "number is incompatible with string"

Thoughts?