Go - JSON - TS casing difference about protobuf-es

[timostamm]

one cannot marshal go-structs to JSON and load it in your TS code

You can! protojson.Marshal serializes your message to JSON in Go, and the method fromJsonString() parses from JSON in TS. This interoperability is a crucial feature and it definitely works reliably.

What you can't do is json.Marshal a message in Go. See the explanation in this comment:

The generation of the json tag pre-dated the formalization of the JSON<->PB specification. In it's current state, using encoding/json does not produce JSON that conforms to any particular pre-defined schema.

For similar reasons, you cannot JSON.parse() a message in TS. Our fromJsonString() methods use JSON.parse() under the hood, but they also take care of field name variations and other details that protobuf and TypeScript can represent, but JSON cannot, for example NaN. It also gives you structural validation when parsing JSON and is interoperable with all other protobuf implementations.

Closing this, but let us know if you think there's a missing piece.