aspect-ratio
Layout
Locks the width-to-height ratio; set one side and the other follows.
| How to write it | aspect-ratio: auto; |
|---|---|
| Common values | auto, 1 / 1, 16 / 9 |
| Inherited | No — it stops at this element |
| Category | Layout |
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 aspect-ratio property?
Locks the width-to-height ratio; set one side and the other follows.
Q. How do you write aspect-ratio?
As aspect-ratio: auto; Common values include auto, 1 / 1, 16 / 9.
Q. Is aspect-ratio inherited?
No. It applies only where you write it, so each element needs its own declaration.
Q. What group does aspect-ratio belong to?
The layout group.