$('#id').length is the old school, and most widely used, technique.
This is probably the fastest.
$('#id').is('*') does make sense semantically (expresses the intent),
and is more flexible.
Larry
On Dec 25, 12:33 am, "Alexey Blinov" <[EMAIL PROTECTED]> wrote:
> Yep... my code have size(). Forgot to point it...
> And thanks for info about more efficient way - using length.
> So... which way is better than?
>
> 1. $('#id').length > 0
>
> 2. $('#id').length() !== 0
>
> 3. $('#id').is('*') //never try it... but look pretty
>
> - Alexey
>
> On Dec 25, 2007 5:39 AM, Michael Geary <[EMAIL PROTECTED]> wrote:
>
>
>
> > $('#id').size !== 0 would not work. I'll bet that your actual code has
> > .size() instead of .size without the parentheses, right? The size property
> > is a method, so the !== 0 test would always return true (since a function
> > reference is never equal to 0).
>
> > .length is slightly more efficient than .size() - look at the source code
> > for the .size method:
>
> > size: function() {
> > return this.length;
> > }
>
> > The only reason the size method exists at all is for compatibility with
> > very old jQuery code that may have used it back in the days when there was
> > no .length property.
>
> > -Mike- Hide quoted text -
>
> - Show quoted text -
