border-style

The border-style property is a shorthand property for setting the line style for all four sides of the element´s border.

/* Apply to all four sides */
border-style: dashed;
/* vertical | horizontal */
border-style: dotted solid;
/* top | horizontal | bottom */
border-style: hidden double dashed;
/* top | right | bottom | left */
border-style: none solid dotted dashed; 
/* Global values */
border-style: inherit;
border-style: initial;
border-style: unset;

Syntax

The border-style property may be specified using one, two, three, or four values.

• One value applies to all four sides.
• Two values apply first to top and bottom, the second one to left and right.
• Three values apply first to top, second to left and right and third to bottom.
• Four values apply to top, right, bottom and left in that order (clockwise).

Each value is a keyword chosen from the list below.

Values

<br-style>

Is a keyword describing the style of the bottom border. It can have the following values:

none		Like for the hidden keyword, displays no border. In that case, except if a background image is set, the calculated values of border-width will be 0, even if specified otherwise through the property. In case of table cell and border collapsing, the none value has the lowest priority: it means that if any other conflicting border is set, it will be displayed.
hidden		Like for the none keyword, displays no border. In that case, except if a background image is set, the calculated values of border-width will be 0, even if specified otherwise through the property. In case of table cell and border collapsing, the hidden value has the highest priority: it means that if any other conflicting border is set, it won't be displayed.
dotted		Displays a series of rounded dots. The spacing of the dots is not defined by the specification and is implementation-specific. The radius of the dots is half the calculated border-width.
dashed		Displays a series of short square-ended dashes or line segments. The exact size and length of the segments are not defined by the specification and are implementation-specific.
solid		Displays a single, straight, solid line.
double		Displays two straight lines that add up to the pixel amount defined as border-width .
groove		Displays a border leading to a carved effect. It is the opposite of ridge.
ridge		Displays a border with a 3D effect, like if it is coming out of the page. It is the opposite of groove.
inset		Displays a border that makes the box appear embedded. It is the opposite of outset. When applied to a table cell with border-collapse set to collapsed, this value behaves like groove.
outset		Displays a border that makes the box appear in 3D, embossed. It is the opposite of inset. When applied to a table cell with border-collapse set to collapsed, this value behaves like ridge.

Formal syntax

<br-style>{1,4}
where 
<br-style> = none | hidden | dotted | dashed | solid | double | groove | ridge | inset | outset

Examples

Table with all property values

Here is an example of all the property values

HTML Content

<table>
    <tr>
        <td class="b1">none</td>
        <td class="b2">hidden</td>
        <td class="b3">dotted</td>
        <td class="b4">dashed</td>
    </tr>
    <tr>
        <td class="b5">solid</td>
        <td class="b6">double</td>
        <td class="b7">groove</td>
        <td class="b8">ridge</td>
    </tr>
    <tr>
        <td class="b9">inset</td>
        <td class="b10">outset</td>
    </tr>
</table>

CSS Content

/* Define look of the table */
table {
    border-width: 3px;
    background-color: #52E396;
}
tr, td {
    padding: 2px;
}
/* border-style example classes */
.b1 {border-style:none;}
.b2 {border-style:hidden;}
.b3 {border-style:dotted;}
.b4 {border-style:dashed;}
.b5 {border-style:solid;}
.b6 {border-style:double;}
.b7 {border-style:groove;}
.b8 {border-style:ridge;}
.b9 {border-style:inset;}
.b10 {border-style:outset;}

Output

Specific​ations

Browser compatibility

[1] Prior to Firefox 50, border styles of rounded corners (with border-radius) were always rendered as if border-style was solid. This has been fixed in Firefox 50.

See also

• The border-related shorthand CSS properties: border, border-width, border-color, border-radius