how to tween to height "auto" or "100%"?

[pier]

I'm coding an  accordion and I'd like to tween the height of a submenu so that it grows from 0px to whatever is it's natural height.

I've found that GSAP doesn't tween values between 0 and 100% or auto.

Apart from having a variable record the final size and pass that to the tween, is there a more GSAP oriented way of solving this?

TIA

[Carl]

The trick is to create a tween that tweens from a height of 0. 

Take a look at the demos from Diaco and Rodrigo here: http://greensock.com/forums/topic/11439-accordion-doesnt-work-animating-height-property-with-tweenmax/?hl=height+auto#entry46444

[pier]

Thanks Carl, I've had problems in the past with .from() and delayed calls so I usually avoid it, but in this case it should work.

[Carl]

If you can explain and replicate the problems with from() and delayedCall() feel free to post a little demo.

Would love to help explain what is happening OR assess and fix any bugs.