mask-size
Effects
Sets the size of the mask image, using the same values as background-size.
| How to write it | mask-size: auto; |
|---|---|
| Common values | auto, cover, contain, 100% 100% |
| Inherited | No — it stops at this element |
| Category | Effects |
How to read this
- An inherited property only needs writing once on the parent — every child picks it up. Most text properties work this way.
- A shorthand resets whatever you leave out. Writing background: red alone also wipes a background image you set earlier.
- When rules collide, the more specific selector wins; only when specificity ties does source order decide.
- Animate transform and opacity for smoothness. Changing width or top forces the layout to be recalculated.
Frequently asked questions
Q. What is the CSS mask-size property?
Sets the size of the mask image, using the same values as background-size.
Q. How do you write mask-size?
As mask-size: auto; Common values include auto, cover, contain, 100% 100%.
Q. Is mask-size inherited?
No. It applies only where you write it, so each element needs its own declaration.
Q. What group does mask-size belong to?
The effects group.