On Mon, 08 Feb 2010 23:06:07 +0100, Steve Souders <st...@souders.org>
wrote:
I'd like to propose the addition of a POSTONLOAD attribute to the SCRIPT
tag.
The behavior would be similar to DEFER, but instead of delaying
downloads until after parsing they would be delayed until after the
window's load event. Similar to DEFER, this new attribute would ensure
scripts were executed in the order they appear in the document, although
it could be combined with ASYNC to have them execute as soon as the
response is received.
Developers can do this now using JavaScript, but it's complex and
errorprone. For example, how should the script be added to the document?
People typically append to the 'head' element, but some pages don't have
a 'head' element and some browsers don't create a default one. And
'documentElement' doesn't work in all browsers either. The safest path
I've seen is to append to ( head || body ). Whether everyone agrees this
is best, it reveals the complexity developers will have to consider.
Adding this attribute would lower the bar promoting this best practice
for making web pages faster.
Which browsers do not create a <head> element? I thought we fixed our bug.
Also, introducing new features mainly to work around existing bugs is
generally not a good idea. We'd only increase the potential for
interoperability issues.
--
Anne van Kesteren
http://annevankesteren.nl/
