support sending objects via postMessage

[stagas]

Hey, first of all thanks for this work, it's working well for testing BroadcastChannel locally.

However according to https://developer.mozilla.org/en-US/docs/Web/API/BroadcastChannel/postMessage#message we should be able to send messages other than just strings. I know it's impossible to support the full structuredClone algorithm, but we could in the meantime simply use JSON.stringify/parse? Thoughts?

Thanks!

[hugojosefson]

Thank you!

Yes, that's right. We should be able to send almost anything there.

However, when implementing this, I couldn't find a satisfactory serialize/deserialize implementation that would allow me to send everything over the network to the other process. So I decided instead to only support string for now, and let the user bring their own serialize/deserialize implementation, as long as it can serialize to string. (For example JSON.stringify/parse as you mention!)

Do you know of an implementation that can serialize+deserialize all structuredclonable things?