[whatwg] sessionStorage and the Storage event
Honza Bambas
honzab at allpeers.com
Mon Oct 26 16:06:41 PDT 2009
The spec says:
"When the |setItem()
<http://dev.w3.org/html5/webstorage/#dom-storage-setitem>|,
|removeItem()
<http://dev.w3.org/html5/webstorage/#dom-storage-removeitem>|, and
|clear() <http://dev.w3.org/html5/webstorage/#dom-storage-clear>|
methods are called on a |Storage
<http://dev.w3.org/html5/webstorage/#storage-0>| object x that is
associated with a session storage area, if the methods did something,
then in every |HTMLDocument| object whose |Window| object's
|sessionStorage
<http://dev.w3.org/html5/webstorage/#dom-sessionstorage>| attribute's
|Storage <http://dev.w3.org/html5/webstorage/#storage-0>| object is
associated with the same storage area, other than x, a |storage
<http://dev.w3.org/html5/webstorage/#event-storage>| event must be
fired, as described below
<http://dev.w3.org/html5/webstorage/#event-storage>."
[http://dev.w3.org/html5/webstorage/#dom-sessionstorage]
The same applies to localStorage.
Maybe I read something wrong, but as a sessionStorage object is always
unique to its document (it is cloned when a new document with the same
origin is created and then independent from the original document's
object) it, in my opinion, doesn't make sense to send the event to any
other document then the one its storage has been changed. On the other
hand, it makes sense to me to not fire the event in the same document
where the storage has been changed (as for localStorage), then, I'd say
there should be no event for sessionStorage at all. I simply don't a
case when two or more documents would share a single sessionStorage object.
Thanks for clearing this.
-hb-
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