[selection-api] Why does getRangeAt must return a reference to (not a copy of) the range? (#40)

The spec currently say:

> it must return a reference to (not a copy of) the context object's range.

and in its following note, it says it's currently not interoperable. Are there any reasons or good use cases to make this a "must" when implementations are not interoperable?

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Reply to this email directly or view it on GitHub:
https://github.com/w3c/selection-api/issues/40