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Re: Shutting script down when leaving page

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In article <6507961.N3xZG9CObR@PointedEars.de>, Thomas 'PointedEars'
Lahn <PointedEars@web.de> wrote:

> Andrew Poulos wrote:
> 
> > On 27/01/2014 2:25 PM, Xox wrote:
> >> Let us suppose I have a page, a.html, which contains a script which
> >> constantly invokes itself or is invoked -- it's running not necessarily
> >> continuously but at regular intervals, or maybe it is looping.
> 
> There are no pages, they are not “running”, and they certainly do not 
> “loop”.  Scripts do not “invoke themselves” either.
> 
> Script code may cause other code to be executed repeatedly, using the 
> browser API, and it may cause a resource in a view to be reloaded, upon 
> which it could be executed again if it was part of that resource.  That
> is not a loop.

Yet more sneering by PointyHead at people's "incorrect" use of
terminology. Still, I expect it's how he's used to treating his
students, if any.

> > Perhaps calling onunload and/or onbeforeunload and stopping the script
> > will help.
> 
> “onunload” and “onbeforeunload” are event-handler attributes and properties.  
> They cannot be called by the developer to the desired effect because the 
> developer does not know when they should call them in the first place.
> 
> There is an unfortunate tendency of saying that something is “called” when 
> any action is caused by anything, particularly among beginners.  People 
> nonsensically speak of “Ajax calls”, for example.

  var request = new XMLHttpRequest ();
  ...
  request.send (data);

Hmmm, looks like a function call to me.

If PointyHead were less of an arsehole, he might have simply reassured
the OP by describing what happens to a page being displayed, and its
resources, when the user navigates to another page. IOW, behaved like a
good teacher. But no. Instead, he feels an irresistible urge to demean
posters by making corrections to their usage of terminology, and their
manner of posting.

-- 
"The idea that Bill Gates has appeared like a knight in shining armour to
 lead all customers out of a mire of technological chaos neatly ignores 
 the fact that it was he who, by peddling second-rate technology, led them
 into it in the first place."                             - Douglas Adams

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Thread

Shutting script down when leaving page Xox <etacx18@etaoin.com> - 2014-01-27 03:25 +0000
  Re: Shutting script down when leaving page Andrew Poulos <ap_prog@hotmail.com> - 2014-01-27 18:08 +1100
    Re: Shutting script down when leaving page "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2014-01-27 10:23 +0100
    Re: Shutting script down when leaving page Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-01-27 11:21 +0100
      Re: Shutting script down when leaving page Tim Streater <timstreater@greenbee.net> - 2014-01-27 10:41 +0000
        Re: Shutting script down when leaving page Xox <etacx18@etaoin.com> - 2014-01-27 19:43 +0000
          Re: Shutting script down when leaving page "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2014-01-27 20:53 +0100
            Re: Shutting script down when leaving page Xox <etacx18@etaoin.com> - 2014-01-27 20:52 +0000
          Re: Shutting script down when leaving page Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-01-28 01:20 +0100
            Re: Shutting script down when leaving page Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-01-28 01:24 +0100
            Re: Shutting script down when leaving page "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2014-01-27 18:44 -0800
            Re: Shutting script down when leaving page Xox <etacx18@etaoin.com> - 2014-01-28 05:03 +0000
              Re: Shutting script down when leaving page Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-01-28 11:33 +0100
                Re: Shutting script down when leaving page Xox <etacx18@etaoin.com> - 2014-01-28 19:40 +0000
            Re: Shutting script down when leaving page "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2014-01-28 09:31 +0100
      Re: Shutting script down when leaving page Christoph Michael Becker <cmbecker69@arcor.de> - 2014-01-27 21:37 +0100
        Re: Shutting script down when leaving page Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-01-28 00:10 +0100
          Re: Shutting script down when leaving page Christoph Michael Becker <cmbecker69@arcor.de> - 2014-01-28 00:54 +0100

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