TransformOrigin on Height transform?

[sorciereus 5 Likes (Newbie)]

Hi there. This seems rather simple but actually might not be as a simple of a solution as I was hoping for. I'm trying to transform the height of a div:

 

#mountain
{
position: absolute;
top: 175px;
left: 18px; 
width:123px;
height:46px;
background-image:url(mountain.png);
}

Using this GSAP

TweenMax.from('#mountain', .5, {height:0, transformOrigin:"bottom"});

On 

<div id="mountain"></div>

However it does transforms the height, it scales the div from the top down regardless of the transformOrigin setting. What am I missing? I suspect transformOrigin does not cover height? Can you suggest a workaround for what I'm trying to accomplish? 

 

Thanks. 

 

[Rodrigo 2,662 Likes (Superhero)]

Hi,

 

The issue is that according to the box model spec, the height and width are considered from the top/left corner of the element. Also keep in mind that the transform origin property is for... you got it!! transforms and not size animations, such as width and height. The transform origin will take effect using scales. So you could scale your element in the Y axis from 0 using that transform origin string:

TweenLite.from(element, 1, {scaleY:0, transformOrigin:"center bottom"});

Another option is the solution Shaun posted in this thread:

 

http://greensock.com/forums/topic/12283-expand-div-from-bottom-to-top/

[sorciereus 5 Likes (Newbie)]

Hi thanks while the ScaleY isn't what I was looking for neither was Shaun's solution, however that Thread led me to this: 

See the Pen OVeeQa by ohem (@ohem) on CodePen

 

And this: 

See the Pen KmLjr by GreenSock (@GreenSock) on CodePen

which is what I was looking for.  

 

Thanks!