[whatwg] Proposal for a tab visibility API

Michael[tm] Smith mike at w3.org
Thu Apr 28 20:40:28 PDT 2011

James Robinson <jamesr at google.com>, 2011-04-28 13:08 -0700:

> On Thu, Apr 28, 2011 at 12:40 PM, Ian Hickson <ian at hixie.ch> wrote:
> > Back in December there was a discussion about a tab visibility API.
> >
> > I haven't added this feature to the HTML specification at this time, for
> > a couple of reasons: first, it seems like something we'd really want to
> > have implementation experience before deciding on a specific API, and
> > second, it seems like something that belongs more in the CSSOM API spec
> > than in the primarily media-independent HTML spec.
> >
> > I have saved all the feedback on the topic in case anyone is interested in
> > working on a specification for this.
> For what it's worth the Web Performance working group has added this to its
> charter and has started work on this API:
> http://www.w3.org/2011/04/webperf.html.

There's a draft spec here:


So the feedback should probably either go the public-web-perf at w3.org
mailing list, with [PageVisibility] in the subject -


...or directly to the editors (Jatinder Mann from Microsoft and Arvind Jain
from Google).


Michael[tm] Smith

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