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Re:Show HN: AcrossTabs – Easy communication between cross-or... by cryptarch on Wednesday April 05, 2017 @12:39PM (#14043384)
Put the wildcard functionality behind a setter with a long name and make the default the current domain?
Re:Show HN: AcrossTabs – Easy communication between cross-or... by Bartkusa on Wednesday April 05, 2017 @02:28PM (#14044375)
Put it behind a setter with "doNotUseOrYouWillBeFired" in the function name.

https://github.com/facebook/react/blob/80bff5397bf854750dbe7...