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Re: Javascript TEL: URI support detection

From Richard Maher <maher_rjSPAMLESS@hotmail.com>
Newsgroups comp.lang.javascript
Subject Re: Javascript TEL: URI support detection
Date 2015-05-18 18:53 +0800
Organization Aioe.org NNTP Server
Message-ID <mjcgc2$ce6$1@speranza.aioe.org> (permalink)
References <mj9jm9$tj0$1@speranza.aioe.org> <ccc9cb83-e4b1-4fa7-a52f-3885f6c6d0c3@googlegroups.com>

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On 5/18/2015 1:01 PM, Michael Haufe (TNO) wrote:
> On Sunday, May 17, 2015 at 3:32:18 AM UTC-5, Richard Maher wrote:
>> I've googled around and cannot find a reliable way to detect Browser and
>> Device support for "TEL:" URIs with Javascript.
>>
>> If it's a mobile phone then the anchor link works as expected. But if
>> it's a PC without telephone and voice capability it just fails silently :-(
>>
>> What solution(s) are you using?
>
> Short answer is that this is not possible by design.

> Long answer is guesswork and hackish:
>
> All I could think of is to attach an onclick listener to the link(s),

> then when they are clicked on attach an onblur event to the window

>plus a short timer of say a couple seconds that will clean itself up.
>
> If the window blurs, you can guess with some probability that some

>application registered to that protocol took control. If after a short

>period of time (mentioned above) nothing took window focus,

>assume protocol is not supported
>

Interesting. I hadn't seen this anywhere before and I've looked :-(

I think your/our problem is although Chrome fails silently (all?) others 
(phoneless desktops) appear to try and fail to redirect to "tel:1234".

Before reading your post I was starting to look at the ONBEFOREUNLOAD 
event as a way of offering the user an explanation that you shouldn't 
really be here and you probably don't have a phone capability.

I think I was able to get Chrome to fail with window.location= and some 
sort of cross-domain failure on the protocol (or was that FireFox?)

Anyway, thanks very much for the useful feed-back!

Cheers Richard Maher

PS. Please find a News Reader that wraps.

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Thread

Javascript TEL: URI support detection Richard Maher <maher_rjSPAMLESS@hotmail.com> - 2015-05-17 16:32 +0800
  Re: Javascript TEL: URI support detection "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-05-17 11:32 +0200
    Re: Javascript TEL: URI support detection Richard Maher <maher_rjSPAMLESS@hotmail.com> - 2015-05-17 19:12 +0800
      Re: Javascript TEL: URI support detection Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-05-19 21:59 +0200
  Re: Javascript TEL: URI support detection "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2015-05-17 22:01 -0700
    Re: Javascript TEL: URI support detection Richard Maher <maher_rjSPAMLESS@hotmail.com> - 2015-05-18 18:53 +0800
      Re: Javascript TEL: URI support detection "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2015-05-18 08:53 -0700
        Re: Javascript TEL: URI support detection Richard Maher <maher_rjSPAMLESS@hotmail.com> - 2015-05-19 21:13 +0800
          Re: Javascript TEL: URI support detection "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2015-05-19 14:08 -0700
            Re: Javascript TEL: URI support detection Richard Maher <maher_rjSPAMLESS@hotmail.com> - 2015-05-21 06:10 +0800
              Re: Javascript TEL: URI support detection Richard Maher <maher_rjSPAMLESS@hotmail.com> - 2015-05-31 13:12 +0800
                Re: Javascript TEL: URI support detection Richard Maher <maher_rjSPAMLESS@hotmail.com> - 2015-06-01 18:52 +0800
                Re: Javascript TEL: URI support detection "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2015-06-10 18:49 -0700
                Re: Javascript TEL: URI support detection Richard Maher <maher_rjSPAMLESS@hotmail.com> - 2015-06-13 08:15 +0800
                Re: Javascript TEL: URI support detection Richard Maher <maher_rjSPAMLESS@hotmail.com> - 2015-06-22 06:07 +0800
                Re: Javascript TEL: URI support detection Richard Maher <maher_rjSPAMLESS@hotmail.com> - 2015-06-22 06:08 +0800
                Re: Javascript TEL: URI support detection "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2015-06-24 14:09 -0700
                Re: Javascript TEL: URI support detection Richard Maher <maher_rjSPAMLESS@hotmail.com> - 2015-06-25 18:54 +0800
                Re: Javascript TEL: URI support detection "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2015-06-25 06:40 -0700
                Re: Javascript TEL: URI support detection ittsmith1@gmail.com - 2015-07-20 18:57 -0700

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