February 2015
Intermediate to advanced
664 pages
24h 26m
Polish
Content preview from Programowanie w JavaScript Rusz głową!
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jesteś tutaj
501
Funkcje anonimowe, zasięg i domknięcia
Jak używać funkcji anonimowych?
A zatem chcemy utworzyć funkcję do obsługi zdarzeń
load
, wiemy jednak, że jest to „funkcja
jednorazowa”, gdyż zdarzenie to jest generowane tylko jeden raz podczas całego okresu prezentacji
strony w przeglądarce. Możemy także zauważyć, że we właściwości
window.onload
jest zapisywana
referencja do funkcji — a konkretnie rzecz biorąc, referencja do funkcji
handler
. Ponieważ
jednak funkcja ta jest przeznaczona tylko do jednokrotnego użycia, zatem określanie jej nazwy jest
niepotrzebne, gdyż używamy jej jedynie po to, by zapisać referencję we właściwości
window.onload ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.