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Groups > comp.lang.javascript > #27214

Re: Synchronous XMLHttpRequest deprecated

From Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups comp.lang.javascript
Subject Re: Synchronous XMLHttpRequest deprecated
Date 2015-04-07 01:13 +0200
Organization PointedEars Software (PES)
Message-ID <2719713.BApv8GKvXd@PointedEars.de> (permalink)
References (2 earlier) <3049656.CVpVeAz9R9@PointedEars.de> <060420151323054349%timstreater@greenbee.net> <1787376.QsvDXBBI4c@PointedEars.de> <060420151826574912%timstreater@greenbee.net> <mfujmf$qns$3@dont-email.me>

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Denis McMahon wrote:

> On Mon, 06 Apr 2015 18:26:57 +0000, Tim Streater wrote:
>> Gee, I'll have to smack those users harder, then, so they don't click on
>> the little red X in the top corner of the window.
> 
> I guess that technically what you should do is redesign the browser UI
> component and the back end so that the back end data is never in an
> inconsistent state .....
> 
> I know, it's a lot easier said than done.

Appeal to ridicule.

Christoph has already made a good suggestion.  There are other possibilities 
to not having to use the *user-unfriendly* synchronous XHR, but they depend 
on the use-case.  For example, if you wanted to make sure that a user is 
logged out, you could keep a server-side session alive in the background 
(using asynchronous XHR if possible, an image or a reloading hidden frame if 
necessary) and end it automagically when there is no further request (by 
short session lifetime).  And on the client-side, you can use a session 
cookie or Session Storage.

It should also be noted that Firefox/Gecko is unique in its behavior of 
purportedly trying to be “user-friendly”.  This can have unforeseen 
consequences.  For example, there is no good reason why I should not be able 
to request fullscreen mode from a timeout, why I should get the  following 
warning instead if I first wanted to play a sound from a HTML5 audio 
element, then request full-screen:

| Request for full-screen was denied because Element.mozRequestFullScreen() 
| was not called from inside a short running user-generated event handler. 

-- 
PointedEars
FAQ: <http://PointedEars.de/faq> | SVN: <http://PointedEars.de/wsvn/>
Twitter: @PointedEars2 | ES Matrix: <http://PointedEars.de/es-matrix>
Please do not cc me. / Bitte keine Kopien per E-Mail.

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Synchronous XMLHttpRequest deprecated Chuck Anderson <seemysig@thisis.invalid> - 2015-04-04 17:34 -0600
  Re: Synchronous XMLHttpRequest deprecated Richard Maher <maher_rjSPAMLESS@hotmail.com> - 2015-04-05 08:09 +0800
  Re: Synchronous XMLHttpRequest deprecated Luuk <luuk@invalid.lan> - 2015-04-05 18:06 +0200
    Re: Synchronous XMLHttpRequest deprecated "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2015-04-05 10:42 -0700
      Re: Synchronous XMLHttpRequest deprecated Luuk <luuk@invalid.lan> - 2015-04-05 22:04 +0200
    Re: Synchronous XMLHttpRequest deprecated "Christoph M. Becker" <cmbecker69@arcor.de> - 2015-04-05 22:59 +0200
      Re: Synchronous XMLHttpRequest deprecated Chuck Anderson <seemysig@thisis.invalid> - 2015-04-05 23:09 -0600
        Re: Synchronous XMLHttpRequest deprecated Tim Streater <timstreater@greenbee.net> - 2015-04-06 10:20 +0000
  Re: Synchronous XMLHttpRequest deprecated Silvio <silvio@internet.com> - 2015-04-05 23:41 +0200
    Re: Synchronous XMLHttpRequest deprecated Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-04-06 14:11 +0200
      Re: Synchronous XMLHttpRequest deprecated Tim Streater <timstreater@greenbee.net> - 2015-04-06 13:23 +0000
        Re: Synchronous XMLHttpRequest deprecated Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-04-06 15:36 +0200
          Re: Synchronous XMLHttpRequest deprecated Tim Streater <timstreater@greenbee.net> - 2015-04-06 18:26 +0000
            Re: Synchronous XMLHttpRequest deprecated Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-04-06 20:18 +0200
            Re: Synchronous XMLHttpRequest deprecated Denis McMahon <denismfmcmahon@gmail.com> - 2015-04-06 18:35 +0000
              Re: Synchronous XMLHttpRequest deprecated Tim Streater <timstreater@greenbee.net> - 2015-04-06 21:51 +0000
                Re: Synchronous XMLHttpRequest deprecated "Christoph M. Becker" <cmbecker69@arcor.de> - 2015-04-06 23:33 +0200
              Re: Synchronous XMLHttpRequest deprecated Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-04-07 01:13 +0200
      Re: Synchronous XMLHttpRequest deprecated Silvio <silvio@internet.com> - 2015-04-07 09:16 +0200
        Re: Synchronous XMLHttpRequest deprecated Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-04-07 12:51 +0200
          Re: Synchronous XMLHttpRequest deprecated Silvio <silvio@internet.com> - 2015-04-07 14:55 +0200
            Re: Synchronous XMLHttpRequest deprecated Tim Streater <timstreater@greenbee.net> - 2015-04-07 14:23 +0000
              Re: Synchronous XMLHttpRequest deprecated Silvio <silvio@internet.com> - 2015-04-07 17:41 +0200
            Re: Synchronous XMLHttpRequest deprecated Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-04-07 15:37 +0200
              Re: Synchronous XMLHttpRequest deprecated Silvio <silvio@internet.com> - 2015-04-07 16:53 +0200
                Re: Synchronous XMLHttpRequest deprecated Tim Streater <timstreater@greenbee.net> - 2015-04-07 16:03 +0000
                Re: Synchronous XMLHttpRequest deprecated Silvio <silvio@internet.com> - 2015-04-07 17:47 +0200

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