I agree with you, Ariel... got your point, doing a test with 'html' can
catch elements within the 'head' or itself, also... :-)
Another example of the utility of a feature like this, Dan:
var uniqueDiv = $('div#unique');
uniqueDiv.length == 1;
uniqueDiv.remove();
uniqueDiv.length == 1; // OK... not an expected behaviour, is it?! ;-)
Ariel, any ideas for using an expando to persist the information, but
without having to traverse through all the childNodes and setting a lot of
properties? Maybe something using $.data(jElement)?
Diogo Baeder
On Sat, Nov 29, 2008 at 3:01 PM, Ariel Flesler <[EMAIL PROTECTED]> wrote:
>
> That's not the described behavior:
>
> var $div = $('<div />');
> $div.inDom() == false;
> $div.appendTo('body');
> $div.inDom() == true;
>
> --
> Ariel Flesler
> http://flesler.blogspot.com
>
> On Nov 29, 2:59 pm, "Dan Switzer" <[EMAIL PROTECTED]> wrote:
> > > I'm new here (and in jQuery), but even though I'd like to propose some
> > > simple but usefull method to the jQuery object (at core.js) to tell
> > > the API user if an element exists in the document. I've tried to build
> > > one as follows:
> >
> > > [CODE]
> > > (function($) {
> >
> > > $.fn.inDOM = function() {
> > > return !!this.parents('body').length;
> > > };
> >
> > > })(jQuery);
> >
> > > jQuery(document).ready(function(){
> > > var jEl = $('.someExistingClass');
> >
> > > // Should be in DOM
> > > console.debug(jEl.inDOM());
> >
> > > // Removing the element
> > > jEl.remove();
> >
> > > // Should NOT be in DOM
> > > console.debug(jEl.inDOM());
> > > });
> > > [/CODE]
> >
> > I'm not sure how useful this would be, since this tells you the same
> thing:
> >
> > var inDOM = $('.someExistingClass').length
> >
> > If the length is 0 it doesn't exist, otherwise it does. Since the
> > number 0 equates to false and a positive integer equates to true, this
> > tells you the exact information.
> >
> > The only thing it potentially does is improve visibility. In that case
> > I'd opt for the name exists() instead of inDOM.
> >
> > And you could just do:
> >
> > jQuery.fn.exists = function (){ return this.length > 0 }
> >
> > (I did a check to return a true boolean of either true or false.)
> >
> > -Dan
> >
>
--
Diogo Baeder
http://www.diogobaeder.com.br
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