[Bug 27826] New: Media Element currentTime setting with no src defined

https://www.w3.org/Bugs/Public/show_bug.cgi?id=27826

            Bug ID: 27826
           Summary: Media Element currentTime setting with no src defined
           Product: HTML WG
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P2
         Component: HTML5 spec
          Assignee: dave.null@w3.org
          Reporter: jdsmith@microsoft.com
        QA Contact: public-html-bugzilla@w3.org
                CC: mike@w3.org, public-html-admin@w3.org,
                    public-html-wg-issue-tracking@w3.org

There is normative guidance in the spec that says currentTime can be set on a
media element when no src is defined, and non-normative guidance in a note that
says doing this should cause an invalidStateError.  I just did a quick check,
and behaviors for various browsers vary:

-  IE11:  returns an invalidStateError
-  Chrome:  returns a DOMException with a message that says the element
readyState is HAVE_NOTHING
-  Firefox:  returns an invalidStateError

I believe the non-normative note is affecting the behaviors, and that it should
be acceptable to set the default position on a media element with no src yet
attached.  The correct behavior would seem to be setting the currentTime value
with error.

--------------------------------
Details:

The non-normative note is just under
http://www.w3.org/html/wg/drafts/html/master/embedded-content.html#offsets-into-

media . currentTime [ = value ]
Returns the official playback position, in seconds.
Can be set, to seek to the given time.
Will throw an InvalidStateError exception if there is no selected media
resource or if there is a current media controller.

The normative guidance is in a paragraph lower down in the section:

The currentTime attribute must, on getting, return the media element's default
playback start position, unless that is zero, in which case it must return the
element's official playback position. The returned value must be expressed in
seconds. On setting, if the media element has a current media controller, then
the user agent must throw an InvalidStateError exception; otherwise, if the
media element's readyState is HAVE_NOTHING, then it must set the media
element's default playback start position to the new value; otherwise, it must
set the official playback position to the new value and then seek to the new
value. The new value must be interpreted as being in seconds.

The same language is in the WHATWG living HTML spec.

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Received on Wednesday, 14 January 2015 00:34:53 UTC