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Groups > comp.lang.javascript > #16164
| From | Gene Wirchenko <genew@ocis.net> |
|---|---|
| Newsgroups | comp.lang.javascript |
| Subject | Re: Who's eaten my apple and why? |
| Date | 2012-09-26 17:59 -0700 |
| Organization | A noiseless patient Spider |
| Message-ID | <f097689vq8t2i4d344qhsse20dg9jephgj@4ax.com> (permalink) |
| References | <37c94a7b-70f8-47f5-b5b8-2a1b3350de43@u19g2000yqo.googlegroups.com> <k403fb$o5g$1@speranza.aioe.org> |
On Thu, 27 Sep 2012 01:35:17 +0200, Christoph Becker
<cmbecker69@gmx.de> wrote:
>justaguy wrote:
>> function dSelect() {
>> var sel = document.getElementById('mySel');
>> var o = document.createElement('option');
>>
>> o.value="a";
>> o.text="apple";
>> sel.options.add(o);
>> alert(sel.length);
>>
>> o.value="ora";
>> o.text="orange";
>> sel.options.add(o);
>> alert(sel.length);
>> }
>
>Your're adding the *same* object to the HTMLSelectElement twice. What's
Aren't the values simply taken? If I set o to null after both
adds, it does not affect the select options so it presumably is not
referring to o after it is used to add an option.
>happening is explained in the specs
>(<http://www.w3.org/TR/DOM-Level-2-HTML/html.html#ID-94282980>). If you
>want to add two "options", you have to create two distinct
>HTMLOptionElement objects:
Where is it explained, please? I have looked at the whole
section of select options, and I can not see it.
> function dSelect() {
> var sel = document.getElementById('mySel');
> var o = document.createElement('option');
> o.value="a";
> o.text="apple";
> sel.options.add(o);
> alert(sel.length);
>
> o = document.createElement('option');
> o.value="ora";
> o.text="orange";
> sel.options.add(o);
> alert(sel.length);
> }
Yes, this works, but I do not understand why a second element
needs to be created.
Sincerely,
Gene Wirchenko
Back to comp.lang.javascript | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Who's eaten my apple and why? justaguy <lichunshen84@gmail.com> - 2012-09-26 14:43 -0700
Re: Who's eaten my apple and why? Christoph Becker <cmbecker69@gmx.de> - 2012-09-27 01:35 +0200
Re: Who's eaten my apple and why? justaguy <lichunshen84@gmail.com> - 2012-09-26 17:46 -0700
Re: Who's eaten my apple and why? Stefan Weiss <krewecherl@gmail.com> - 2012-09-27 03:51 +0200
Re: Who's eaten my apple and why? justaguy <lichunshen84@gmail.com> - 2012-09-26 19:44 -0700
Re: Who's eaten my apple and why? Stefan Weiss <krewecherl@gmail.com> - 2012-09-27 22:06 +0200
Re: Who's eaten my apple and why? Gene Wirchenko <genew@ocis.net> - 2012-09-26 17:59 -0700
Re: Who's eaten my apple and why? Stefan Weiss <krewecherl@gmail.com> - 2012-09-27 04:16 +0200
Re: Who's eaten my apple and why? Gene Wirchenko <genew@ocis.net> - 2012-09-26 19:38 -0700
Re: Who's eaten my apple and why? Stefan Weiss <krewecherl@gmail.com> - 2012-09-27 05:44 +0200
Re: Who's eaten my apple and why? Gene Wirchenko <genew@ocis.net> - 2012-09-27 09:28 -0700
Re: Who's eaten my apple and why? Tim Streater <timstreater@greenbee.net> - 2012-09-27 17:40 +0100
Re: Who's eaten my apple and why? Gene Wirchenko <genew@ocis.net> - 2012-09-27 16:24 -0700
Re: Who's eaten my apple and why? Dr J R Stockton <reply1239@merlyn.demon.co.uk.invalid> - 2012-09-29 20:47 +0100
Re: Who's eaten my apple and why? Christoph Becker <cmbecker69@gmx.de> - 2012-09-27 13:00 +0200
Re: Who's eaten my apple and why? Gene Wirchenko <genew@ocis.net> - 2012-09-27 09:34 -0700
Re: Who's eaten my apple and why? Christoph Becker <cmbecker69@gmx.de> - 2012-09-27 19:14 +0200
Re: Who's eaten my apple and why? Stefan Weiss <krewecherl@gmail.com> - 2012-09-27 21:40 +0200
Re: Who's eaten my apple and why? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-09-28 15:39 +0200
Re: Who's eaten my apple and why? Gene Wirchenko <genew@ocis.net> - 2012-09-27 16:25 -0700
Re: Who's eaten my apple and why? Tim Streater <timstreater@greenbee.net> - 2012-09-27 08:52 +0100
Re: Who's eaten my apple and why? Gene Wirchenko <genew@ocis.net> - 2012-09-26 17:50 -0700
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