2.1.4 [WEBSTG] Section 4.4, The storage event

V0008:

The specification states:

 Otherwise, if the event is being fired due to an invocation of the clear() method, the event must have its key, oldValue, and newValue attributes initialized to null.
  
 In addition, the event must have its url attribute initialized to the address of the document whose Storage object was affected; and its storageArea attribute initialized to the Storage object from the Window object of the target Document that represents the same kind of Storage area as was affected (i.e. session or local).

IE8 Mode (All Versions)

The key, oldvalue, newValue, and storageArea attributes are not supported.

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