Bug Tracker

#4015 closed bug (invalid)

Opened January 28, 2009 06:49PM UTC

Closed August 12, 2010 01:35AM UTC

Animation causes repeated div background image requests in IE6

Reported by: dcartoon Owned by:
Priority: major Milestone: 1.3.2
Component: effects Version: 1.3.1
Keywords: background-image, multiple, requests, IE6 Cc:
Blocked by: Blocking:
Description

Scenario: A page has a div with a background-image. An event triggers animation of the div's properties e.g. size or position.

Problem: In IE6, the background-image for the div is requested repeatedly while animation is in progress. Additional images within the div are not affected(i.e. the problem appears to only occur with background images)

Expected: The background-image is requested once when the div is loaded and then no further requests are made.

I have tested this in Firefox 3(Vista), Firefox 2(XP), Safari(Vista) and IE7 (Vista) with no repro.

The repeated requests end up impacting responsiveness since the browser has to potentially make dozens of unnecessary image requests.

This problem also occurs with strict and loose doctypes and affects at least jQuery 1.3.1 and 1.2.6(haven't tested other versions)

I have attached an example page based on one of the jQuery Effects demo pages. The page contains a div which has a background image(the jQuery logo) and an additional image(from the jQuery UI homepage).

I have also attached a snapshot of a session from my debugging proxy which shows the repeated image requests.

Attachments (2)
  • jquery_test.html (0.9 KB) - added by dcartoon January 28, 2009 06:50PM UTC.

    A simple page that causes the problem to repro in IE6

  • request_list.jpg (96.6 KB) - added by dcartoon January 28, 2009 06:50PM UTC.

    Snapshot of requests that occur in IE6 while animating

Change History (3)

Changed April 10, 2009 04:35PM UTC by gabrimonfa comment:1

I can confirm that also on jquery-1.3.2

Changed April 10, 2009 04:41PM UTC by gabrimonfa comment:2

This happens when IE6 "Internet Options" > "Temporary Files" is set on "Every time the page is opened".

At each movement IE is trying to reload the page and asks the background image again, resulting in many many requests on each animation.

Setting it on "Automatically" solves the problem.

So maybe it turns out to be a IE6 bug, instead of a jquery bug...

Changed August 12, 2010 01:35AM UTC by dmethvin comment:3

resolution: → invalid
status: new → closed

This appears to be a IE bug caused by incorrect settings.