border-width
Borders
Sets only the border thickness.
| How to write it | border-width: 0; |
|---|---|
| Common values | 0, 1px, thin |
| Inherited | No — it stops at this element |
| Part of | border |
| Category | Borders |
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 border-width property?
Sets only the border thickness.
Q. How do you write border-width?
As border-width: 0; Common values include 0, 1px, thin.
Q. Is border-width inherited?
No. It applies only where you write it, so each element needs its own declaration.
Q. Which shorthand sets border-width?
border can set it in one line.