[1] ECMAScript® 2017 Language Specification ( (2016-05-14 00:55:22 +09:00)) https://tc39.github.io/ecma262/#sec-algorithm-conventions

[2] Add the ability to construct a callback function (domenic著, 2017-03-27 13:42:03 +09:00) https://github.com/heycam/webidl/commit/36b3646ac02654626b575ac9891b6e9d75adbfe7