[1] Fix #123 by more closely aligning the conversions unions do when a un… ( (bzbarsky著, )) https://github.com/heycam/webidl/commit/e03abb2f43df56e1507d074bbc7c6fa92d65211b
[2] Add a section on overloads vs. union/optional (#426) (TimothyGu著, ) https://github.com/heycam/webidl/commit/a6a713fc31f487532d0d0ed17613cd983f2c3d23
[3] Add an informative section on overloads vs. unions/optional · Issue #307 · heycam/webidl () https://github.com/heycam/webidl/issues/307
[4] Handling overloads · Issue #29 · jsdom/webidl2js () https://github.com/jsdom/webidl2js/issues/29
[5] Add a section on overloads vs. union/optional by TimothyGu · Pull Request #426 · heycam/webidl () https://github.com/heycam/webidl/pull/426
[6] 26087 – (object or ArrayBuffer) does not work () https://www.w3.org/Bugs/Public/show_bug.cgi?id=26087
[7] Disallow Promise types in unions at the syntax level. (Ms2ger著, ) https://github.com/heycam/webidl/commit/cc5b4aa81b7d0e5582d81860b83d6f286f7749df
[8] Disallow Promise types in unions at the syntax level. by Ms2ger · Pull Request #746 · heycam/webidl () https://github.com/heycam/webidl/pull/746
[9] NonAnyType vs SingleType as home of PromiseType ε alternative · Issue #740 · heycam/webidl () https://github.com/heycam/webidl/issues/740