viewport and grid sizing

Hello,



I have a problem with viewport that contains several panels in anchor layout including a grid.

According to docs:

"The Viewport renders itself to the document body, and automatically sizes itself to the size of the browser viewport and manages window resizing."

However when I put many rows into the grid it stretches the viewport.

I would expect that it will cropped and scroll with appear.

How could I achieve such effect?



Here is my sample on the fiddle:

http://ift.tt/1DQlZi9



Regards,

Godfryd

viewport and grid sizing