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Newsgroups: pl.comp.lang.javascript
Date: Wed, 18 Nov 2015 00:21:52 -0800 (PST)
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Subject: Re: Operator ||
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Xref: csiph.com pl.comp.lang.javascript:3189

W dniu wtorek, 17 listopada 2015 15:40:55 UTC+1 u=BFytkownik Romek napisa=
=B3:
> Witam,
>=20
> j=EAzyk javascript jest mi zupe=B3nie obcy. Pewne potrzebne mi informacje=
 znalaz=B3em bibliotece jQuery. Poniewa=BF nie rozumiem zapisu prosz=EA o p=
omoc i wyja=B6nienie. W funkcji jest zapis :
>=20
> jQuery.fn.extend({
> 	offset:=20
> [...]
> return {
>  top: box.top + (win.pageYOffset || docElem.scrollTop)-(docElem.clientTop=
 || 0),
>  left: box.left + (win.pageXOffset || docElem.scrollLeft) - (docElem.clie=
ntLeft || 0)
> [...]
>=20
>=20
> jak jest warto=B6=E6 wyra=BFenia (win.pageYOffset || docElem.scrollTop) l=
ub (docElem.clientTop || 0). Z dokumentacji JS wynika, =BFe operator OR zwr=
aca warto=B6ci TRUE, FALSE i nie mog=EA tego dopasowa=E6 do powy=BFszego wy=
ra=BFenie. Czego nie wiem. Prosz=EA o kr=F3tkie wyja=B6nienie.
>=20
> Romek

Zamie=F1 sobie to na cyferki a wszystko ci si=EA rozja=B6ni:

(win.pageYOffset || docElem.scrollTop)

alert(win.pageYOffset)  np. da 200
alert(docElem.scrollTop)  np. da 100

(200 or 100)

Andrzej.