How do you change the origin of a transform, and what effect does it have on rotation?

How do you change the origin of a transform, and what effect does it have on rotation?

• A. transform-origin: x y; e.g., transform-origin: 0 0; rotates around top-left.
• B. transform-origin: 0 0; rotates around the center.
• C. origin: top left
• D. rotate-origin: center

Answer: (A)

Transform-origin determines the point in the element that acts as the pivot for transforms like rotate (and scale). When you set it to 0 0, you’re placing that pivot at the top-left corner of the element, so rotations happen around that corner rather than the center. If you want the rotation to occur around the center, you’d use 50% 50% (or omit transform-origin, since that’s the default). Values can be lengths or percentages, giving you precise control over where the pivot sits within the element’s box. There isn’t a separate origin or rotate-origin property, so the correct approach is to use transform-origin with the desired coordinates.

Transform-origin determines the point in the element that acts as the pivot for transforms like rotate (and scale). When you set it to 0 0, you’re placing that pivot at the top-left corner of the element, so rotations happen around that corner rather than the center. If you want the rotation to occur around the center, you’d use 50% 50% (or omit transform-origin, since that’s the default). Values can be lengths or percentages, giving you precise control over where the pivot sits within the element’s box. There isn’t a separate origin or rotate-origin property, so the correct approach is to use transform-origin with the desired coordinates.