Comments on: the script defer attribute

By: Laurent CAPRANI

Laurent CAPRANI — Mon, 27 Dec 2010 19:45:06 +0000

Follow-up to the preceding comment

&ellip; and there definetly should be a way to write HTML literals within these comments!

In the preceding post, I wanted to mention «script» elements at the bottom of the «body» element.

By: Laurent CAPRANI

Laurent CAPRANI — Fri, 24 Dec 2010 23:47:33 +0000

@Marcel.
Firefox 3.6 ignores defer for any flavor of HTML (HTML 4 or XHTML) that defines it and this is unfortunate.

When they want to specify that a script interpretation must wait until the document is parsed, most developers rely on tricks like
jQuery’s $(document).ready();
onload events or
-bottom .

There definitely should be a uniform and declarative way. With defer introduced in Firefox 3.5, I thought it was it.

By: kn33ch41

kn33ch41 — Tue, 21 Dec 2010 13:15:16 +0000

There should be a defer attribute for images, particularly considering that Opera is currently the only browser that actually fires DOMContentLoaded before images begin downloading; here is a bug report on Chrome that states the issue: http://code.google.com/p/chromium/issues/detail?id=7008

By: Marcel Korpel

Marcel Korpel — Tue, 14 Dec 2010 22:18:50 +0000

@Laurent: that’s the correct behaviour (per HTML 5 spec). Contrary to what the articles says, FF 3.5′s behaviour is incorrect: `defer` on inline scripts should be ignored, so inline deferred scripts should be executed before external deferred scripts, even when those were included before the inline scripts.

By: Laurent CAPRANI

Laurent CAPRANI — Sun, 05 Dec 2010 03:06:15 +0000

The codes do not work in Firefox 3.6 anymore.
It seems that @defer is disabled for inline scripts.

By: Fawad Hassan

Fawad Hassan — Mon, 27 Sep 2010 07:01:22 +0000

This did so to prevent execution of code here

By: henry

henry — Fri, 01 Jan 2010 06:57:52 +0000

Seems the post is invalid.
See bug 518104 : [HTML5] Implement HTML5 changes to (Need to change so that defer is ignored on inline scripts)
at
https://bugzilla.mozilla.org/show_bug.cgi?id=518104

By: Mike Beltzner

Mike Beltzner — Mon, 29 Jun 2009 14:31:36 +0000

We need to convince Google Ads to switch their script so that it uses this tag, including Doubleclick. Need, need, need.

By: Havvy

Havvy — Sat, 27 Jun 2009 23:04:54 +0000

@N: Search and replace is useful in cases like that.

@Blog: We really need to standardize the process of page loads.

By: Henrik Gemal

Henrik Gemal — Sat, 27 Jun 2009 19:35:35 +0000

BrowserSpy can also show you if defer is supported in your browser:
http://browserspy.dk/javascript.php

By: K

Sat, 27 Jun 2009 09:08:55 +0000

Probably WordPress “helping out”; it likes to do that with quotation marks too…

By: N

Sat, 27 Jun 2009 08:47:44 +0000

Hmmm… the sample HTML isn’t valid HTML, it does not use angle brackets but some weird “stylized” brackets. Someone made a big oopsie.