border-top-style

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

border-top-style CSS 设置元素上边框的 border.

尝试一下

备注: 此规范并未定义不同样式的边框边角处如何连接。

语法

css
/* 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-styleborder-top-style 属性的值。

形式语法

border-top-style = 
<line-style>

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

示例

HTML

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

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

规范

Specification
CSS Backgrounds and Borders Module Level 3
# the-border-style
初始值none
适用元素所有元素. It also applies to ::first-letter.
是否是继承属性
计算值as specified
动画类型离散值

浏览器兼容性

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
border-top-style

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
See implementation notes.

参见