How well do browsers support defer?

[dAEk]

According to W3:

The SCRIPT element
<!ELEMENT SCRIPT - - %Script;          -- script statements -->
<!ATTLIST SCRIPT
  charset     %Charset;      #IMPLIED  -- char encoding of linked resource --
  type        %ContentType;  #REQUIRED -- content type of script language --
  src         %URI;          #IMPLIED  -- URI for an external script --
  defer       (defer)        #IMPLIED  -- UA may defer execution of script --
  >

Attribute definitions:
[...]
defer [CI]
When set, this boolean attribute provides a hint to the user agent that the script is not going to generate any document content (e.g., no "document.write" in javascript) and thus, the user agent can continue parsing and rendering.

I'm wondering how well different browsers support the defer attribute for script tags. I've never used 'em and now I am having trouble seeing when defer can be useful... large javascript libraries perhaps?

Cheers,

[Mittineague]

Interesting. I have never heard of the defer attribute before. It seems that it's only supported in IE 4+ Windows and is most useful for compressed external js files.
http://www.websiteoptimization.com/speed/tweak/defer/

[Dan Schulz]

I have. I was exposed to it for the first time last month when I was working on a site for a client that had posted an ad in the Looking to Hire board of the Marketplace. It's handy.

http://www.htmlhelp.com/reference/ht...al/script.html

[dAEk]

I'll have a look at the links tomorrow. Thanks for your replies.