[mediacapture-region] Should we support strings in addition or in lieu of opaque identifiers? (#46)

youennf has just created a new issue for https://github.com/w3c/mediacapture-region:

== Should we support strings in addition or in lieu of opaque identifiers? ==
CropTarget current proposal is basically an opaque wrapper around some kind of element identifier.
@eladalon1983 original proposal was to expose a string, with some use cases in mind that could take benefit of the identifier being a string.
The WG decided to move to an opaque identifier.
Since then, @eladalon1983 mentioned several times the string use cases with the potential idea to allow CropTarget stringification.

This raises a few questions:
- Should we reconsider our position and directly use string identifiers?
- In that case, should we go with web app provided identifiers or user agent generated identifiers (stringification would mean the latter).
- Should we instead look to support these usecases without stringification? for instance by allowing MessagePort communication in CaptureHandle?

Please view or discuss this issue at https://github.com/w3c/mediacapture-region/issues/46 using your GitHub account


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