On Jun 19, 2009, at 2:10 PM, Brandon! wrote:
So I've always had a couple questions about forms and jQuery, so I
thought I'd finally ask and see if I can get a straight answer
(they're all pretty simple).
First question: When selecting a form element by it's attribute(s),
what's the proper format? Do I need the @ or not basically: input
[...@type="text"] or input[type="text"] I know that both formats work,
but I don't know which is preferred.
Without the @. It was deprecated in 1.2 and removed in 1.3.
Second question: In regards to performance, is there a "best" order to
put attributes in? inp...@name^="line_id"]...@type="checkbox"] vs input
[...@type="checkbox"]...@name^="line_id"] Any good rule of thumb, or is
the outcome negligible?
$(':checkbox[name^=line_id]')
Not sure about performance. Probably negligible.
Third and final question: jQuery().attr('checked', true) or jQuery
().attr('checked', 'checked')? I see it both ways, but I wasn't sure
if it makes a difference. XHTML tells us we want checked="checked",
but I wasn't sure.
Here, .attr() is a bit of a misnomer, because it's really looking at
DOM properties, not (x)HTML attributes. I'm pretty sure either one
works, but I use .attr('checked', true)
Actually, when I can get away with avoiding .attr() I usually do. For
example, I would do:
this.checked = true;
rather than:
$(this).attr('checked', true);
--Karl
____________
Karl Swedberg
www.englishrules.com
www.learningjquery.com
