border-top-style - CSS（层叠样式表） 编辑

border-top-style CSS 设置元素上边框的 border.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

Note: 此规范并未定义不同样式的边框边角处如何连接。

语法

/* 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;

/* Global values */
border-top-style: inherit;
border-top-style: initial;
border-top-style: unset;

选取以上可用关键字之一作为 border-style 的 border-top-style 属性的值.

形式化语法

<line-style>
where 
<line-style> = none | hidden | dotted | dashed | solid | double | groove | ridge | inset | outset

示例

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: 2px;
  background-color: #52E385;
}
tr, td {
  padding: 3px;
}

/* border-top-style example classes */
.b1 {border-top-style: none;}
.b2 {border-top-style: hidden;}
.b3 {border-top-style: dotted;}
.b4 {border-top-style: dashed;}
.b5 {border-top-style: solid;}
.b6 {border-top-style: double;}
.b7 {border-top-style: groove;}
.b8 {border-top-style: ridge;}
.b9 {border-top-style: inset;}
.b10 {border-top-style: outset;}

输出结果

规则

规则	状态	备注
CSS Backgrounds and Borders Module Level 3 border-top-style	Candidate Recommendation	No significant change.
CSS Level 2 (Revision 1) border-top-style	Recommendation	Initial definition.

初始值	none
适用元素	all elements. It also applies to ::first-letter.
是否是继承属性	否
计算值	as specified
Animation type	discrete

浏览器兼容性

BCD tables only load in the browser

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

相关词条

• The other style-related border properties: border-left-style, border-right-style, border-bottom-style, and border-style.
• The other top-border-related properties: border-top, border-top-color, and border-top-width.