Another slideToggle jump effect

[anonymous]

A div contains a UL with LIs floated left and with percentage widths. When slideToggle shows the div, sometimes there's a jump at the end of the animation.

This ​jsfiddle has 12 examples demonstrating the effect.

Giving the UL a width removes the jump, possibly making this a duplicate of ​#8370 and ​#9513. And the behavior is similar to ​#10662.

But it appears if the LI widths add up to 100%, the animation is smooth, which can be seen in the first and second examples.

And when the LI widths don't add up to 100%, there's a jump at the end of the animation.

And confounding things further, in the 10th example, the LI widths do add up to 100% yet there's a jump at the end of the animation.

This inconsistency in behavior may indicate a bug.

[Rick Waldron]

@gnarf can you take a look at this?

[mikesherov]

This is working on edge: ​http://jsfiddle.net/r5L6U/1/

All hail the great, mysterious effects rewrite!

[scottgonzalez]

If it only works in edge shouldn't that be fixed and not worksforme?

[mikesherov]

I suppose. I had seen a few times where we close as WFM when we don't know what fixed it, just that it now works. I can change to just fixed.

[gnarf]

I'd like to try to figure out what was broken at least and write a unit for the fact that we fixed it....

[mikesherov]

feel free to reopen and write a test. I was just trying to triage open tixx. I seem to have failed :-\

[gnarf]

Nah - it definitely closed now, but I'm going to reopen because we don't have a unit covering it, and I want to make sure we can't regress on this one, whatever magic it was that fixed it...

[mikesherov]

gnarf, I haven't found a good way to test this. I'm inclined to just close as fixed. If you'd like to tackle it, please do, other resolve as fixed.