Re: HTML5 embed element event

Path	csiph.com!aioe.org!news.mb-net.net!open-news-network.org!.POSTED.136.226.197.178.dynamic.wless.zhbmb00p-cgnat.res.cust.swisscom.ch!not-for-mail
From	Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups	comp.lang.javascript
Subject	Re: HTML5 embed element event
Date	Thu, 21 May 2020 18:53:19 +0200
Organization	PointedEars Software (PES)
Lines	62
Message-ID	<4261657.LvFx2qVVIh@PointedEars.de> (permalink)
References	<H9idncZ8Oaal4l7DnZ2dnUU7-XHNnZ2d@westnet.com.au> <4588804.31r3eYUQgx@PointedEars.de> <510316de-79da-42b4-8502-ce21d07bacdc@googlegroups.com> <12dbcf64-ebca-4c3d-adc7-26ad1246ca63@googlegroups.com>
Reply-To	Thomas 'PointedEars' Lahn <cljs@PointedEars.de>
Mime-Version	1.0
Content-Type	text/plain; charset="UTF-8"
Content-Transfer-Encoding	8Bit
Injection-Info	gwaiyur.mb-net.net; posting-host="136.226.197.178.dynamic.wless.zhbmb00p-cgnat.res.cust.swisscom.ch:178.197.226.136"; logging-data="19467"; mail-complaints-to="abuse@open-news-network.org"
User-Agent	KNode/4.14.10
Cancel-Lock	sha1:hC1zgF8dyImlJ8K/3SC2un8uHz8=
X-User-ID	U2FsdGVkX19ObVN4tnq5l6+vkTpVQgdNuYOVBn53axYv8fXXRKZ+ag==
Face	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
X-Face	%i>XG-yXR'\"2P/C_aO%~;2o~?g0pPKmbOw^=NT`tprDEf++D.m7"}HW6.#=U:?2GGctkL,f89@H46O$ASoW&?s}.k+&.<b';Md8`dH6iqhT)6C^.Px\|[=M@7=Ik[_w<%n1Up"LPQNu2m8\|L!/3iby{-]A+#YE}Kl{Cw$\U!kD%K}\2jz"QQP6Uqr],./"?;=4v
Xref	csiph.com comp.lang.javascript:38433

Show key headers only | View raw

Michael Haufe (TNO) wrote:

> On Thursday, May 21, 2020 at 10:55:14 AM UTC-5, Michael Haufe (TNO) wrote:
>> ```
>> let featureNames = (obj: object): Set<PropertyKey> =>
>>   obj == null ? new Set() :
>>     new Set([
>>       ...Object.getOwnPropertyNames(obj),
>>       ...featureNames(Object.getPrototypeOf(obj))
>>     ])
>> ```
> 
> oops, I forgot to mention that was in TypeScript. JavaScript:
> 
> ```
> let featureNames = (obj) =>
>   obj == null ? new Set() :
>     new Set([
>       ...Object.getOwnPropertyNames(obj),
>       ...featureNames(Object.getPrototypeOf(obj))
>     ])
> ```

I forgot about Set.  I do not know what you mean by “featureNames”, or why 
you would pass a reference to a two-element Array.

The following would be equivalent to my original suggestion if one would 
write

  var properties = Object.create(null);

there instead:


function getAllPropertyNames (obj)
{
  /* Object instead of Array to avoid duplicates automatically */
  let properties = new Set();

  do {
    Object.getOwnPropertyNames(obj)
      .forEach(name => {set.add(name)});
  } while ((obj = Object.getPrototypeOf(obj)));

  return Array.from(properties.keys());
}

/* $0 in the Chrome Dev Console refers to the currently selected element 
node in the Tree Pane */
var el = $0;

getAllPropertyNames(el).filter(name => name.indexOf('on') === 0)
  .forEach(name => {
    el[name] = ((ev) => { console.log(ev); });
  });

ISTM that the advantage that Set provides in this case is too small.

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

Thread

HTML5 embed element event Andrew Poulos <ap_prog@hotmail.com> - 2020-05-19 16:39 +1000
  Re: HTML5 embed element event "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2020-05-19 17:29 +0200
    Re: HTML5 embed element event Andrew Poulos <ap_prog@hotmail.com> - 2020-05-20 07:45 +1000
      Re: HTML5 embed element event "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2020-05-20 00:21 +0200
        Re: HTML5 embed element event rcpj@panix.com (Pierre Jelenc) - 2020-05-20 01:09 +0000
          Re: HTML5 embed element event Andrew Poulos <ap_prog@hotmail.com> - 2020-05-20 18:36 +1000
          Re: HTML5 embed element event "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2020-05-20 12:36 +0200
  Re: HTML5 embed element event "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2020-05-19 17:21 -0700
    Re: HTML5 embed element event Andrew Poulos <ap_prog@hotmail.com> - 2020-05-20 18:43 +1000
  Re: HTML5 embed element event Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2020-05-21 17:15 +0200
    Re: HTML5 embed element event "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2020-05-21 08:55 -0700
      Re: HTML5 embed element event "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2020-05-21 08:57 -0700
        Re: HTML5 embed element event Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2020-05-21 18:53 +0200
          Re: HTML5 embed element event "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2020-05-21 11:00 -0700
            Re: HTML5 embed element event Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2020-05-21 21:50 +0200
              Re: HTML5 embed element event Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2020-05-21 22:03 +0200
              Re: HTML5 embed element event "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2020-05-21 15:25 -0700
                Re: HTML5 embed element event Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2020-05-23 03:06 +0200

csiph-web