Animate hiding contained borders

Reported by:	leo@banyanbranch.com	Owned by:
Priority:	low	Milestone:	1.next
Component:	effects	Version:	1.5.1
Keywords:		Cc:
Blocked by:		Blocking:

Description

Click on "go" on...

http://jsfiddle.net/kG3dD/

Repro'd on jquery v1.5.1 and 1.4.2.

Two nested divs of the same size, with inner set to 100%. Inner div is yellow with a blue border. Animating the size of the outer div clips the bottom and right blue border during animation, and then restores them when done.

I'd expect the blue border to remain in tact during the animation. Maybe this is deliberate for some other reason, but the behavior certainly seems buggy.

Attachments (0)

Change History (5)

Changed March 14, 2011 02:48PM UTC by rwaldron comment:1

component:	unfiled → effects
owner:	→ gnarf
priority:	undecided → low
status:	new → assigned

Changed March 14, 2011 06:10PM UTC by gnarf comment:2

_comment0:	This bug doesn't surprise me much, http://jsfiddle.net/gnarf/kG3dD/1/ \ \ If you take a look at that fiddle, you'll see that the outer container is applied an {{{ overflow: hidden }}}... This causes the inside box to fall outside because {{{width: 100%}}} doesn't take into account the borders on the element. \ \ See also http://jsfiddle.net/gnarf/kG3dD/2/ → 1300128459359905

This bug doesn't surprise me much, http://jsfiddle.net/gnarf/kG3dD/1/

If you take a look at that fiddle, you'll see that the outer container is applied an

 overflow: hidden

... This causes the inside box to fall outside because

width: 100%

doesn't take into account the borders on the element.

See also http://jsfiddle.net/gnarf/kG3dD/3/ for a "working" version of your fiddle...

Changed March 22, 2011 11:02PM UTC by leo@banyanbranch.com comment:3

In the simplified example, it's easy to do the math yourself on the boxes and make them fit. In the real world where this came from that doesn't work.

Adding .css('overflow', 'visible') after the .animate() call is a fairly good workaround, i.e. http://jsfiddle.net/q3j3R/

Changed May 24, 2011 06:53AM UTC by gnarf comment:4

owner:	gnarf
status:	assigned → open

You could also just use

 box-sizing: border-box

where supported... https://developer.mozilla.org/en/CSS/box-sizing

Changed July 25, 2012 12:50AM UTC by dmethvin comment:5

resolution:	→ invalid
status:	open → closed

We can't do anything about this, it's the default CSS box model. As gnarf says, you could use box-sizing: border-box when possible.

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#8515 closed bug (invalid)