Ticket #10539 (closed bug: fixed)
animate() might cause error in IE6-8
| Reported by: | abiao.chen | Owned by: | |
|---|---|---|---|
| Priority: | low | Milestone: | 1.8 |
| Component: | effects | Version: | 1.6.4 |
| Keywords: | Cc: | ||
| Blocking: | Blocked by: |
Description
On IE 6-8, some page will throw an error when calling
$("ul").animate({"left":"0%"}, 500)
After debugging, I found the animate() function(For 1.6.4, Line8286-8288) will compute start value by moving the element and testing the pixelLeft attribute.
jQuery.style( this, p, (end || 1) + unit); start = ((end || 1) / e.cur()) * start; jQuery.style( this, p, start + unit);
The first line will call
elem.style["left"]="1%"
to set the elem position. In IE6-8, this might NOT modify the pixelLeft attribute, for example the width of the containing block is 0. Thus, the e.cur() in the second line returns 0, and start value becomes NaN, which causes error in the later step( for 1.6.4, Line 8296).
For better robustness, I suggest to test the e.cur() return value in the second line, likes:
start = (e.cur() == 0) ? 0 : ((end || 1) / e.cur()) * start;
here is the test HTML.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<!--[bchen8]2011-9-22-->
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Page Title</title>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.6.4.js"></script>
<script>
function move() {
$("ul").animate({"left":"0%"}, 500);
}
</script>
</head>
<body>
<a href='javascript:move()' style="left:0"><tr>click</tr></a>
<div style="width:0">
<ul style="left: 0%;">
</ul>
</div>
</body>
</html>
Change History
comment:1 Changed 19 months ago by dmethvin
- Priority changed from undecided to low
- Status changed from new to open
- Component changed from unfiled to effects
comment:2 Changed 17 months ago by BiAiB
This bug has the side effect of not setting the timerId to false, which will block any further animate call. I think it's because of this line (8397):
if ( t() && jQuery.timers.push(t) && !timerId ) {
this totally freeze the application I work on. Here's my fix (~8207~8213 on v1.6.2):
// We need to compute starting value
if ( unit !== "px" ) {
jQuery.style( this, p, (end || 1) + unit);
//bugfix IScope http://bugs.jquery.com/ticket/10539#comment:1
//start = ((end || 1) / e.cur()) * start;
var cur = e.cur();
start = cur==0?0:(((end || 1) / cur) * start);
jQuery.style( this, p, start + unit);
}
Please follow the bug reporting guidlines and use jsFiddle when providing test cases and demonstrations instead of pasting the code in the ticket.