CSS参考手册
背景和边框 | Backgrounds & Borders
边框样式属性 | border-top-style
border-top-style
CSS属性设置元素的顶部的线条样式border
。
/* 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;
注意:规范没有定义不同风格的边界如何连接角落。
返回值 |
none |
---|---|
适用元素 |
all elements. It also applies to ::first-letter. |
是否是继承属性 |
no |
适用媒体 |
visual |
计算值 |
as specified |
Animation type |
discrete |
正规顺序 |
the unique non-ambiguous order defined by the formal grammar |
语法
该border-top-style
属性被指定为从border-style
属性中选择的单个关键字。
正式语法
<br-style>where
<br-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;}
结果
规范
Specification |
Status |
Comment |
---|---|---|
CSS Backgrounds and Borders Module Level 3The definition of 'border-top-style' in that specification. |
Candidate Recommendation |
No significant change. |
CSS Level 2 (Revision 1)The definition of 'border-top-style' in that specification. |
Recommendation |
Initial definition. |
浏览器兼容性
Feature |
Chrome |
Edge |
Firefox |
Internet Explorer |
Opera |
Safari |
---|---|---|---|---|---|---|
Basic Support |
1 |
(Yes) |
11 |
5.5 |
9.2 |
1 |
Feature |
Android |
Chrome for Android |
Edge mobile |
Firefox for Android |
IE mobile |
Opera Android |
iOS Safari |
---|---|---|---|---|---|---|---|
Basic Support |
? |
? |
(Yes) |
(Yes)1 |
? |
? |
? |
在Firefox 50之前,圆角(带border-radius
)的边框样式总是呈现为好像border-top-style
被设定成solid
一样。这已在Firefox 50中修复。
背景和边框 | Backgrounds & Borders相关
层叠样式表( Cascading Style Sheets )是一种用来表现 HTML 或 XML 等文件样式的计算机语言。CSS 不仅可以静态地修饰网页,还可以配合各种脚本语言动态地对网页各元素进行格式化。