CSS transform-origin property

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The transform-origin CSS property sets the origin for an element's transformations.

Initial value	50% 50% 0
Applies to	transformable elements

  
transform-origin: top right;

x-offset

Is a or a describing how far from the left edge of the box the origin of the transform is set.

offset-keyword

Is one of the left, right, top, bottom, or center keyword describing the corresponding offset.

y-offset

Is a or a describing how far from the top edge of the box the origin of the transform is set.

x-offset-keyword

Is one of the left, right, or center keyword describing how far from the left edge of the box the origin of the transform is set.

y-offset-keyword

Is one of the top, bottom, or center keyword describing how far from the top edge of the box the origin of the transform is set.

Is a (and never a which would make the statement invalid) describing how far from the user eye the z=0 origin is set.