Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.javascript > #8527

Re: Jquery to create 2 or multiple events in .change

Show all headers | View raw

Thomas 'PointedEars' Lahn wrote:
> Gregor Kofler wrote:
>> Am 2011-11-21 14:31, Scott Sauyet meinte:
>>> Jesolo Sun wrote:
>>> […]
>>>>   $("select#stampa").change(function(){
>>>>     var stampa = $("select#stampa option:selected").attr('value');
>>>>     // ...
>>>>   });
>
>>> This is cleaner, and I think it would work equally well:
>
>>>     $("select#stampa").change(function(){
>>>       var stampa = $(this).val();
>>>       // ...
>>>     }
>
> Those two approaches are _not_ equivalent, and the second one would
> certainly _not_ work equally well.  We have discussed the difference between
> the value of a selected `option' and the value of a `select' so often here
> that I have lost count.

Really?  I'm surprised because I don't recall it being discussed in
the two years I've been reading.  I certainly don't read every post,
and could well have missed one, but if it were so common, I would have
thought I'd have seen it.  Odd.

Except in the case of multiple selections, I don't know what the
difference would be.  Would you be willing to explain?  In the case of
multiple selection, the approach I suggested would return an array of
the selected values, whereas the original would only return the first
one.  I think that would be an improvement, but YMMV.  What other
differences are there?

> [ ... ]
> For that matter, wouldn't
>
>   document.getElementById("stampa").onchange = function () {
>     var stampa = this.value;
>   };
> [ suffice?]
>
> Answer: Nooo.  Neither wouldn't be k€wL enough!!" (far too efficient and
> compatible ;-))

Am I right that this would only show at most the first selection in
multi-select mode?  I know that's the case in the browsers I've
tested, but I have only tested a few recent browsers.  And in IE8,
would that even show any value?

  -- Scott

Back to comp.lang.javascript | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Jquery to create 2 or multiple events in .change  "Jesolo Sun" <gala@tiscali.it> - 2011-11-21 11:21 +0100
  Re: Jquery to create 2 or multiple events in .change Scott Sauyet <scott.sauyet@gmail.com> - 2011-11-21 05:31 -0800
    Re: Jquery to create 2 or multiple events in .change Gregor Kofler <usenet@gregorkofler.com> - 2011-11-21 23:32 +0100
      Re: Jquery to create 2 or multiple events in .change Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-11-22 01:12 +0100
        Re: Jquery to create 2 or multiple events in .change Scott Sauyet <scott.sauyet@gmail.com> - 2011-11-22 06:54 -0800
      Re: Jquery to create 2 or multiple events in .change Scott Sauyet <scott.sauyet@gmail.com> - 2011-11-23 18:16 -0800

csiph-web