1) HTML5 says this about DataTransfer.files:
The files attribute must return a live FileList sequence consisting of File
objects representing the files found by the following steps. The same object
must be returned each time. Furthermore, for a given FileList object and a
given underlying file, the same File object must be used each time.
2) The FileAPI spec defines FileList as a sequence<File>
3) The Web IDL spec says this about sequences:
The sequence<T> type is a parameterized type whose values are (possibly
zero-length) sequences of values of type T. Sequences are always passed by value. In
language bindings where a sequence is represented by an object of some kind, passing
a sequence to a user agent implemented object will not result in a reference to the
sequence being kept by that object. Similarly, any sequence returned from a user
agent implemented object will be a copy and modifications made to it will not be
visible to the object.
Doesn't WebIDL pass-by-value requirement conflict with the HTML5
always-return-the-same-object requirement?
David
