On Thu, 25 Jan 2007 14:48:35 -0500, David Håsäther <[EMAIL PROTECTED]>
wrote:
Why does the Selectors API define two methods for retrieving nodes?
I understand that there are speed gains by having a method that grabs
just the first node, but how often do you want to do that? Don't you
want to grab the second node as often? Or the last?
How do you mean?
Sorry for not being clear.
What I mean is, why does grabbing the first node deserve its own method?
Is that really a common thing to do, grabbing the first node? More
common than grabbing the second or last node for instance?
Do you have a concrete example? Say that in the following document we want
to get one of the <p> elements:
<html>
<p/>
<p/>
<p/>
</html>
We'd do this as follows:
1. document.getElementBySelector("html > p")
2. document.getElementBySelector("html > p:not(:first-child)")
3. document.getElementBySelector("html > p:last-child")
(Or using an equivalent group of selectors.)
--
Anne van Kesteren
<http://annevankesteren.nl/>
<http://www.opera.com/>
