[whatwg] Html 5 video element's poster attribute
chris at pearce.org.nz
Sun Sep 19 20:10:03 PDT 2010
On 20/09/2010 12:50 p.m., Aryeh Gregor wrote:
> On Sun, Sep 19, 2010 at 4:53 PM, Shiv Kumar<skumar at exposureroom.com> wrote:
>> The poster frame should remain visible until the video is played.
> I agree with Silvia, this should be required by the spec.
This makes sense, we should spec this so that the poster /must/ be
visible until its played, otherwise the poster attribute can't be relied
upon by authors.
>> The poster should show again after the video has ended.
> I'm ambivalent about this. I could go either way.
Aesthetically, I feel we shouldn't show the poster once the video has
finished. Authors could script this behaviour if they wanted it. The
spec as it's written forbids showing the poster after a video frame has
>> The visibility of the poster should be scriptable and/or controllable using
>> an attribute. Meaning that one should be able to turn on/off the poster
>> (without changing the poster attrbute’s value)
> I don't see why this is necessary.
I also don't see why this is necessary. The poster attribute is only
useful if it's enabled, it's not useful if it isn't. Having an attribute
to denote whether the poster attribute is enabled seems like duplication
of state to me.
> You can just do
> video.dataset.poster = video.poster;
> to remove it, and
> video.poster = video.dataset.poster;
> to restore, if you like. (In browsers that implement dataset, which
> is apparently only WebKit so far. But you can easily store the
> original value someplace else, although not quite as elegantly.)
The specification for poster  implies that we should handle dynamic
changes to the poster attribute. I can imagine authors may want to cycle
through a chain of poster images for a given video, and this can
(theoretically) be easily implemented by changing the poster attribute
in a timer.
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the whatwg