column-rule
Layout
Draws a line between columns; it takes up no space of its own.
| How to write it | column-rule: 1px solid #ccc; |
|---|---|
| Common values | 1px solid #ccc, none |
| 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 column-rule property?
Draws a line between columns; it takes up no space of its own.
Q. How do you write column-rule?
As column-rule: 1px solid #ccc; Common values include 1px solid #ccc, none.
Q. Is column-rule inherited?
No. It applies only where you write it, so each element needs its own declaration.
Q. What group does column-rule belong to?
The layout group.