[7] Make window.external methods no-ops · whatwg/html@8edcc5b ( 版) https://github.com/whatwg/html/commit/8edcc5b97c54b0f007bb3552cd5a326e80dcbbde
[8] Expose window.External (annevk著, ) https://github.com/whatwg/html/commit/ee1b2ac7a6e5b862c2c3f7e4dc8f8215b2a5d6bc
[9] Expose self.External by annevk · Pull Request #4296 · whatwg/html () https://github.com/whatwg/html/pull/4296
[10] Implementation-defined typeof still necessary? · Issue #1440 · tc39/ecma262 () https://github.com/tc39/ecma262/issues/1440