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Newsgroups: pl.comp.lang.javascript
Date: Sat, 21 Nov 2015 07:42:52 -0800 (PST)
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Subject: newbie: problem z keyup() z jQuery
From: jivanmukta@poczta.onet.pl
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Xref: csiph.com pl.comp.lang.javascript:3197

Ucz=EA si=EA JavaScriptu. Na razie jestem kiepski. Mam na formularzu (nazwa=
nym formName) pole textarea (nazwane 'Opis:') i chcia=B3bym =BFeby u=BFytko=
wnik mia=B3 informacj=EA ile znak=F3w mo=BFe jeszcze wprowadzi=E6. Robi=EA =
to tak (u=BFywam jQuery na stronie bo jest mi potrzebne do innych rzeczy):

$('form#' + formName + ' textarea#message').keyup(function () { return onKe=
yUpAtTextArea('contact', 'message'); });
...
function maxLengthOfArea(textarea, counter) {
    if (textarea.getAttribute('maxlength') >=3D textarea.value.length) {
        counter.innerHTML =3D textarea.getAttribute('maxlength') - textarea=
.value.length;
        return true;
    }
    return false;
}
...
function onKeyUpAtTextArea(controller, elemId) {
    'use strict';
    var formName =3D getCurrentFormName(controller);
    var currentForm =3D getCurrentForm(controller);
    var textarea =3D getFormElement(currentForm, elemId);
    var counter =3D $('form#' + formName + ' span#' + elemId + '_left')[0];
    return maxLengthOfArea(textarea, counter);
}

Problem w tym, =BFe funkcja onKeyUpAtTextArea nie jest wo=B3ana przy nacisk=
aniu klawisza w polu textarea. Debugguj=B1c JavaScript zauwa=BFy=B3em, =BFe=
 przy wykonywaniu kodu jQuery:

	// Handle event binding
	jQuery.fn[ name ] =3D function( data, fn ) {
		return arguments.length > 0 ?
			this.on( name, null, data, fn ) :
			this.trigger( name );
	};

mam:

fn =3D=3D /\r?\n/g
data =3D=3D "ReferenceError: data is not defined"
name =3D=3D ""
jQuery.fn.name =3D=3D undefined

Czy to mo=BFe by=E6 przyczyn=B1 tego =BFe onKeyUpAtTextArea nie jest wywo=
=B3ywana?
Rozwi=B1zanie mi dzia=B3a=B3o, ale po przerobieniu strony na responsywn=B1 =
przesta=B3o dzia=B3a=E6.
Jak rozwi=B1za=E6 problem?