型 Boolean、ブール値 (JavaScript)

[4]

A boolean value is a member of the type Boolean and is one of two unique values, true and false.

[5]

The type Boolean represents a logical entity and consists of exactly two unique values. One is called true and the other is called false.

Boolean オブジェクト (JavaScript)

[6]

A Boolean object is a member of the type Object and is an instance of the built-in Boolean object. That is, a Boolean object is created by using the Boolean constructor in a new expression, supplying a boolean as an argument. The resulting object has an implicit (unnamed) property that is the boolean. A Boolean object can be coerced to a boolean value.

メモ

[7] Bug 28477 – Warn against boolean arguments defaulting to true (2015-04-14 12:39:48 +09:00 版) <https://www.w3.org/Bugs/Public/show_bug.cgi?id=28477>

[8] Write structured clone algorithm in terms of ECMAScript · whatwg/html@bfb960c (2016-03-02 16:44:53 +09:00 版) <https://github.com/whatwg/html/commit/bfb960c938580c95e77365e614218b952f96375b>

[1] Breaking: refactor structured clone into serialize/deserialize (domenic著, 2017-03-21 06:09:33 +09:00) <https://github.com/whatwg/html/commit/97d644c97335956610a31e8ad98d1a388c063e84>