[whatwg] Device proximity and light events

[Carr, Wayne]

How do you detect if the UA supports each of these sensor?

I thought when I first looked at this there was onxxxx on the window object for one of them but not the other.  But I don't see it for either. 


>-----Original Message-----
>From: whatwg-bounces at lists.whatwg.org [mailto:whatwg-
>bounces at lists.whatwg.org] On Behalf Of Jonas Sicking
>Sent: Tuesday, May 08, 2012 4:02 PM
>To: Doug Turner
>Cc: JOSE MANUEL CANTERA FONSECA; whatwg at whatwg.org; Andrei Popescu
>Subject: Re: [whatwg] Device proximity and light events
>
>On Tue, May 8, 2012 at 3:33 PM, Doug Turner <dougt at mozilla.com> wrote:
>>
>> On May 8, 2012, at 3:26 PM, Jonas Sicking wrote:
>>
>>> The reason that I'm not really happy with this API is the fact that
>>> it forces pages to remove all event listeners in order to shut down a
>>> sensor.
>>
>> True.  I haven't heard of anyone actually worrying about this.
>>
>>> It seems more author friendly to me to allow pages to keep event
>>> listeners registered but to have an "on/off" switch which they can
>>> use to control if they want the sensor to be enabled. (Setting it to
>>> "off" would of course only affect if events are delivered to that
>>> page. If another page set it to "on" the UA would still fire the
>>> events to the second page, and that page only).
>>
>> I do not think we have similar on/off switch APIs for other DOM apis…. Do we?
>
>We haven't really had any other pieces of hardware which a page could want to
>switch on/off so I'm not sure the question really applies.
>
>/ Jonas