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border-style CSS 프로퍼티는 요소의 4면 경계 줄 스타일을 설정하는 단축 속성 이다.

/* Keyword values */
border-top-style: none;
border-top-style: hidden;
border-top-style: dotted;
border-top-style: dashed;
border-top-style: solid;
border-top-style: double;
border-top-style: groove;
border-top-style: ridge;
border-top-style: inset;
border-top-style: outset;

/* 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;
Note: border-style 의 기본 값은 none이다. 만약 border-width와 border-color를 바꾼다면, 이 프로퍼티를 none 이나 hidden 이 아닌 다른걸로 바꾸지 않는 이상 경계를 볼 수 없다. 

초기값as each of the properties of the shorthand:
적용대상all elements. It also applies to ::first-letter.
상속no
Mediavisual
Computed valueas each of the properties of the shorthand:
Animation typediscrete
Canonical orderthe unique non-ambiguous order defined by the formal grammar

Syntax

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

  • When one value is specified, it applies the same style to all four sides.
  • When two values are specified, the first style applies to the top and bottom, the second to the left and right.
  • When three values are specified, the first style applies to the top, the second to the left and right, the third to the bottom.
  • When four values are specified, the styles apply to the top, right, bottom, and left in that order (clockwise).

Each value is a keyword chosen from the list below.

Values

<br-style>
Describes the style of the border. It can have the following values:
none
 
Like the hidden keyword, displays no border. Unless a background-image is set, the calculated value of border-top-width will be 0, even if the specified value is something else. In the case of table cell and border collapsing, the none value has the lowest priority: if any other conflicting border is set, it will be displayed.
hidden
 
Like the none keyword, displays no border. Unless a background-image is set, the calculated value of border-top-width will be 0, even if the specified value is something else. In the case of table cell and border collapsing, the hidden value has the highest priority: 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-top-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 size defined by border-width or border-top-width.
groove
 
Displays a border with a carved appearance. It is the opposite of ridge.
ridge
 
Displays a border with an extruded appearance. It is the opposite of groove.
inset
 
Displays a border that makes the element 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 element appear 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

<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

/* 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

Specification Status Comment
CSS Backgrounds and Borders Module Level 3
The definition of 'border-style' in that specification.
Candidate Recommendation No change.
CSS Level 2 (Revision 1)
The definition of 'border-style' in that specification.
Recommendation Adds hidden keyword value.
CSS Level 1
The definition of 'border-style' in that specification.
Recommendation Initial definition.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support1121143.51
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
Basic support2.6 ?12417 Yes3

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

See also

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