[jQuery] Re: data cache and tag attributes

[Paul Carey]

I explored this in a little more detail (specifically, adding non
standard attributes to HTML markup), and wrote up my thoughts.

http://pa.ulcarey.com/articles/2008/09/04/illegally-embedding-attributes-for-fun-and-profit

On Sep 2, 8:33 am, Paul Carey [EMAIL PROTECTED] wrote:
 Very helpful, thanks for the response.
 Paul

 On Aug 28, 12:16 pm, Richard D. Worth [EMAIL PROTECTED] wrote:

  Some downsides to using expandos (arbitrary attribute key/value pairs on
  DOMElements):

  1) possible memory leaks
  2) keyname choice is limited because of built in attributes/properties
  3) have to be careful about what you stick in there (see 1). Best to stick
  with simple values, ints and strings

  jQuery solves these by putting at most 1expandoon each element. The value
  is an int, so it's safe from memory leaks. The attribute key is prefixed
  with 'jquery' so there's no naming collision. Then the object store/cacheis
  completely external to the DOMElement itself. It's as easy to use as
  .attr(); just substitute .data().

  - Richard

[jQuery] Re: data cache and tag attributes

[Paul Carey]

Very helpful, thanks for the response.
Paul

On Aug 28, 12:16 pm, Richard D. Worth [EMAIL PROTECTED] wrote:
 Some downsides to using expandos (arbitrary attribute key/value pairs on
 DOMElements):

 1) possible memory leaks
 2) keyname choice is limited because of built in attributes/properties
 3) have to be careful about what you stick in there (see 1). Best to stick
 with simple values, ints and strings

 jQuery solves these by putting at most 1 expando on each element. The value
 is an int, so it's safe from memory leaks. The attribute key is prefixed
 with 'jquery' so there's no naming collision. Then the object store/cache is
 completely external to the DOMElement itself. It's as easy to use as
 .attr(); just substitute .data().

 - Richard

[jQuery] Re: callback executed before effect ended

[Paul Carey]

 problem is that next element appears while current element is still
 fading out, any idea what i'm doing wrong?

Maybe you could add display:none;  to the current css class.

Paul

[jQuery] data cache and tag attributes

[Paul Carey]

Hi

I've been setting arbitrary attributes on my html tags, and using
jQuery to make AJAX requests based on their values. These has worked
well so far as writing out arbitrary attributes from the backend is
trivial.

But I'm about to start using per element attributes more intensively,
and now I'm questioning my approach. I'm aware that jQuery UI makes
heavy use of the data cache and I assume it does so with good reason.

At what point does it make more sense to use the data cache rather
than just set html attributes? I'm thinking when closures or rich
JavaScript objects are required? If my needs are met by key / value
pairs are there any downsides to arbitrary attributes that I should be
aware of?

Many thanks

Paul