February 2015
Intermediate to advanced
664 pages
24h 26m
Polish
Content preview from Programowanie w JavaScript Rusz głową!
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Piszemy prawdziwy kod
Jak działa funkcja prompt?
Przeglądarka udostępnia wbudowaną funkcję pozwalającą na pobieranie danych od
użytkowników; nosi ona nazwę
prompt
. W dużym stopniu przypomina funkcję
alert
—
podobnie jak ona, powoduje wyświetlenie okna dialogowego z podanym komunikatem.
Jednak oprócz tego w oknie znajduje się pole tekstowe, w którym użytkownik może coś
wpisać. Ta odpowiedź użytkownika, w formie łańcucha znaków, jest przekazywana jako
wynik wywołania funkcji
prompt
. Jeśli jednak użytkownik zamknie okno dialogowe lub
niczego w nim nie wpisze, zwrócona zostanie wartość
null
.
guess = prompt("*otöw, cel, pal! (podaj lic ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.