Constrain tests

.Constrain

renders 1:1

supports dynamic, inline ratios

.Constrain--contain

contains image within block

.Constrain--5by4

renders 5:4

.Constrain--4by3

renders 4:3

.Constrain--3by2

renders 3:2

.Constrain--8by5 / Constrain--16by10

renders 16:10

.Constrain--16by9

renders 16:9

.Constrain--top

image gravitates towards top edge

.Constrain--bottom

image gravitates towards bottom edge

.Constrain--left

image gravitates towards left edge

.Constrain--right

image gravitates towards right edge

.Constrain--topLeft

image gravitates towards top left corner

.Constrain--topRight

image gravitates towards top right corner

.Constrain--bottomLeft

image gravitates towards bottom left corner

.Constrain--bottomRight

image gravitates towards bottom right corner