I have placed a resizable in the middle of a container div, by giving it absolute position and manually setting the top and left values. When I set the resizable's containment to the container div, the resizing acts strange. I am not able to resize it down or to the right. When I resize it up or to the left sometimes it changes position instead of just changing size. And I am able to resize it out of the container div. I am attaching a demo page.