2.2.49 [HTML] Section 17.13.2, Successful controls
C0048:
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The current value of a file select is a list of one or more file names. Upon submission of the form, the contents of each file are submitted with the rest of the form data. The file contents are packaged according to the form's content type.
All Document Modes (All Versions)
Form content type = multipart/form-data
is supported. Only one file per file select control is supported.
V0119:
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The current value of an object control is determined by the object's implementation.
Quirks Mode, IE7 Mode, and IE8 Mode (All Versions)
Determining the current value of an object control by the
object’s implementation is not supported. Instead, [object]
is submitted as the value of the submitted OBJECT element.
IE9 Mode (All Versions)
Nothing is submitted as the current value of a submitted OBJECT element.
C0049:
-
If a control doesn't have a current value when the form is submitted, user agents are not required to treat it as a successful control.
All Document Modes (All Versions)
Even if a control does not have a current value specified, the control is treated as successful, and submission of the control occurs when the form is submitted.