Margin, padding and border

Margin affects the space around the outside of a node. A node with margin offsets itself from the bounds of its parent and also pushes its siblings. Margin contributes to the size of an auto-sized parent. Margins can be "auto", which absorbs free space along the main axis.

Padding affects the size of the node it is applied to. Since nodes use box-sizing: border-box, padding does not add to the size of a node with an explicit size. For auto-sized nodes, padding grows the node and offsets its children.

Border behaves exactly like padding during layout. It only exists as a separate property so that a renderer knows how thick a border to draw.

node.setMargin(Edge.All, 5);
node.setMargin(Edge.Left, "auto");
node.setPadding(Edge.Horizontal, 20);
node.setBorder(Edge.Bottom, 2);