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Groups > comp.lang.javascript > #35471
| Newsgroups | comp.lang.javascript |
|---|---|
| Date | 2018-08-12 11:12 -0700 |
| References | (4 earlier) <pkmroi$slk$1@solani.org> <2d0334bc-a32a-3be6-e0cd-fc55d7e7446c@PointedEars.de> <pkplrp$rrc$1@solani.org> <5205cdc9-fb48-884b-fe3a-88c6013824c4@PointedEars.de> <pkpra0$k4$1@solani.org> |
| Message-ID | <11d0daaa-2ad3-4cf6-9564-9ab400cdca62@googlegroups.com> (permalink) |
| Subject | Re: addEventListener question |
| From | Julio Di Egidio <julio@diegidio.name> |
On Sunday, 12 August 2018 19:38:14 UTC+2, Christoph M. Becker wrote:
> My following simplified solution[1] is somewhat speculative,
> since it is based on some example HTML and an according script snippet,
> but anyway:
>
> document.getElementById("csschart")
> .addEventListener("click", function (e) {
> var elt = e.target;
> while (elt && elt.tagName !== "DT") {
> while (elt.tagName !== "DD") {
> elt = elt.parentNode;
> }
> elt = elt.previousElementSibling;
> }
> if (elt) alert(elt.textContent - 1);
> });
That is even more inefficient (and obscure) than the original code.
- To find the DTs, the easiest assuming there are no nested lists was to get
the root node by id, then use getElementsByTagName, otherwise set classes
and use getElementsByClassName...
- The function to attach to the DT's click can be just one function and
written separately (adding better structure and clarity) as it does not need
any specific closure: a reference to the target element of the event (which
here is the DT, but the 'this' reference could be used) then to its properties
indeed is easy enough to get.
HTH,
Julio
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addEventListener question Luuk <luuk@invalid.lan> - 2018-08-10 18:21 +0200
Re: addEventListener question "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2018-08-11 00:04 +0200
Re: addEventListener question Luuk <luuk@invalid.lan> - 2018-08-11 14:28 +0200
Re: addEventListener question Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-08-11 14:53 +0100
Re: addEventListener question "Christoph M. Becker" <cmbecker69@arcor.de> - 2018-08-11 16:27 +0200
Re: addEventListener question Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-08-12 17:49 +0200
Re: addEventListener question "Christoph M. Becker" <cmbecker69@arcor.de> - 2018-08-12 18:05 +0200
Re: addEventListener question Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-08-12 18:42 +0200
Re: addEventListener question "Christoph M. Becker" <cmbecker69@arcor.de> - 2018-08-12 19:38 +0200
Re: addEventListener question Julio Di Egidio <julio@diegidio.name> - 2018-08-12 11:12 -0700
Re: addEventListener question James Kirk <noneya.invalid@gmail.com> - 2018-08-12 22:36 -0400
Re: addEventListener question Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-09-06 08:17 +0200
Re: addEventListener question "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2018-08-13 11:50 +0200
Re: addEventListener question Luuk <luuk@invalid.lan> - 2018-08-18 16:50 +0200
Re: addEventListener question "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2018-08-11 16:58 +0200
Re: addEventListener question Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-08-12 02:40 +0100
Re: addEventListener question "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2018-08-12 09:07 +0200
Re: addEventListener question Luuk <luuk@invalid.lan> - 2018-08-11 19:17 +0200
Re: addEventListener question "Christoph M. Becker" <cmbecker69@arcor.de> - 2018-08-11 16:30 +0200
Re: addEventListener question Luuk <luuk@invalid.lan> - 2018-08-11 19:12 +0200
Re: addEventListener question Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-08-12 17:46 +0200
Re: addEventListener question "Christoph M. Becker" <cmbecker69@arcor.de> - 2018-08-12 18:06 +0200
Re: addEventListener question "Christoph M. Becker" <cmbecker69@arcor.de> - 2018-08-12 18:12 +0200
Re: addEventListener question Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-08-12 18:33 +0200
Re: addEventListener question Luuk <luuk@invalid.lan> - 2018-08-18 17:01 +0200
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