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What does : and ? mean in Javascript?

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Feb 03.2009

hi,
im busy learning javascript and I encountered a line of code that i cannot somehow understand (although it works ?).

I would like to know what “?” means and what “:” means. and an explanation for the line of code below.

var elem = (document.all) ? document.all(elemID) : document.getElementById(elemID);

Thanks in advvance!

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JavaScript

2 Comments(s) ↴

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@voidvectorFeb 03.2009 — It is simply a type of conditional statement. The statement you provided can be rewritten as

[CODE]
if (document.all)
var elem = document.all(elemID);
else
var elem = document.getElementById(elemID);
[/CODE]

Wikipedia article on this operator expression
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@liliputauthorFeb 03.2009 — thanks alot for your help ?
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