border-style property allows you to set the border style on all sides of an element.
You can supply from one to four values. Each value specifies the style for each side of the element.
For example, if four values are provided, they will apply to the top, right, bottom and left borders (in that order). Supplying one value applies the style to all four sides. Supplying three values applies the styles to top, left and right, and bottom (in that order).
Details on these values below.
No border. Color and width are ignored. Therefore, the border's width is
0, and the initial value of
border-image-widthwill also resolve to zero.
- A series of round dots.
- A series of square-ended dashes.
- A single line segment.
- Two parallel solid lines with some space between them. When using this value, the
border-widthvalue determines the sum of the lines and the space between them.
- Looks as if it were carved in the canvas.
- Looks as if it were coming out of the canvas.
- Looks as if the content on the inside of the border is sunken into the canvas. Treated as
ridgein the collapsing border model.
- Looks as if the content on the inside of the border is coming out of the canvas. Treated as
groovein the collapsing border model.
In addition, all CSS properties also accept the following CSS-wide keyword values as the sole component of their property value:
- Represents the value specified as the property's initial value.
- Represents the computed value of the property on the element's parent.
- This value acts as either
initial, depending on whether the property is inherited or not. In other words, it sets all properties to their parent value if they are inheritable or to their initial value if not inheritable.
- Initial Value
none(based on the intial value of the individual properties).
- Applies To
- All elements.
- CSS Backgrounds and Borders Module Level 3 (W3C Candidate Recommendation 9 September 2014)
- CSS Level 2.1 (W3C Recommendation 07 June 2011)
- CSS Level 1 (W3C Recommendation 17 Dec 1996)