为什么 W3C Recommendation 总是说 "Document's Window object" 或 "Document object's Window object"？
Why W3C Recommendation always say "Document's Window object" or "Document object's Window object"?
在 W3C Web Storage (Second Edition) 文档中，建议总是说 "Document's Window object" 或 "Document object's Window object" 而不是 "Window object's Document object"。
但众所周知，我们在 javascript 中使用 window.document。
推荐中的"Document"和我们一直在javascript中使用的window.document对象有什么区别？为什么不 "Window object's Document object"？
这是因为（会话）存储与文档关联，而不是 window。或者更具体地说，它根据当前文档的来源进行初始化：
https://www.w3.org/TR/webstorage/#the-sessionstorage-attribute
When a new Document is created in a browsing context which has a
top-level browsing context, the user agent must check to see if that
top-level browsing context has a session storage area for that
document's origin. If it does, then that is the Document's assigned
session storage area. If it does not, a new storage area for that
document's origin must be created, and then that is the Document's
assigned session storage area. A Document's assigned storage area
does not change during the lifetime of a Document.
当然，每个 window 都有它的文档，每个文档都有它的 window1 只是隐含的，在 WebStorage 规范中没有说明，也没有访问明确的关系。
所以当他们说“文档的 Window 对象”时，他们指的是 document's browsing context, accessible as document.defaultView, which are defined in the HTML spec (right next to window.document)。
1：这甚至不完全正确，他们 可能 关联了 documents/windows，但在我们访问存储的所有情况下，他们将要。
在 W3C Web Storage (Second Edition) 文档中，建议总是说 "Document's Window object" 或 "Document object's Window object" 而不是 "Window object's Document object"。
但众所周知，我们在 javascript 中使用 window.document。
推荐中的"Document"和我们一直在javascript中使用的window.document对象有什么区别？为什么不 "Window object's Document object"？
这是因为（会话）存储与文档关联，而不是 window。或者更具体地说，它根据当前文档的来源进行初始化：
https://www.w3.org/TR/webstorage/#the-sessionstorage-attribute
When a new
Documentis created in a browsing context which has a top-level browsing context, the user agent must check to see if that top-level browsing context has a session storage area for that document's origin. If it does, then that is theDocument's assigned session storage area. If it does not, a new storage area for that document's origin must be created, and then that is theDocument's assigned session storage area. ADocument's assigned storage area does not change during the lifetime of aDocument.
当然，每个 window 都有它的文档，每个文档都有它的 window1 只是隐含的，在 WebStorage 规范中没有说明，也没有访问明确的关系。
所以当他们说“文档的 Window 对象”时，他们指的是 document's browsing context, accessible as document.defaultView, which are defined in the HTML spec (right next to window.document)。
1：这甚至不完全正确，他们 可能 关联了 documents/windows，但在我们访问存储的所有情况下，他们将要。