---
title: border-style
slug: Web/CSS/border-style
tags:
  - CSS
  - CSS 属性
  - CSS 边框
  - Web
  - 参考
  - 布局
translation_of: Web/CSS/border-style
---
<h2 id="概述">概述</h2>

<p>{{ CSSRef("CSS Borders") }}</p>

<p><code>border-style</code> 是一个 <a href="/en-US/docs/CSS" title="CSS">CSS</a> 简写属性，用来设定元素所有边框的样式。</p>

<div class="note"><strong>注意：</strong><code>border-style</code> 默认值是 <code>none</code>，这意味着如果您只修改 {{ Cssxref("border-width") }} 和 {{ Cssxref("border-color") }} 是不会出现边框的。</div>



<p>{{EmbedInteractiveExample("pages/css/border-style.html")}}</p>

<div class="hidden">
<p>The source for this interactiv example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone <a href="https://github.com/mdn/interactive-examples">https://github.com/mdn/interactive-examples</a> and send us a pull request.</p>
</div>



<h2 id="语法">语法</h2>

<pre class="brush: css">/* Apply to all four sides */
border-style: dashed;

/* horizontal | vertical */
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;
</pre>

<h3 id="取值">取值</h3>

<dl>
 <dt><code>&lt;br-style&gt;</code></dt>
 <dd>关键字用于描述边框样式。它可以有以下取值：
 <table class="standard-table">
  <tbody>
   <tr>
    <td style="vertical-align: middle;"><code>none</code></td>
    <td style="vertical-align: middle;">
     <div style="border-width: 3px; margin: 0.5em; width: 3em; height: 3em; background-color: palegreen;"></div>
    </td>
    <td style="vertical-align: middle;">和关键字 <code>hidden</code> 类似，不显示边框。在这种情况下，如果没有设定背景图片，{{ cssxref("border-width") }} 计算后的值将是 <code>0</code>，即使先前已经指定过它的值。在单元格边框重叠情况下，<code>none</code> 值优先级最低，意味着如果存在其他的重叠边框，则会显示为那个边框。</td>
   </tr>
   <tr>
    <td style="vertical-align: middle;"><code>hidden</code></td>
    <td style="vertical-align: middle;">
     <div style="border-width: 3px; border-style: hidden; margin: 0.5em; width: 3em; height: 3em; background-color: palegreen;"></div>
    </td>
    <td style="vertical-align: middle;">和关键字 <code>none</code> 类似，不显示边框。<span style="font-size: 13.63636302948px; line-height: 19.0909080505371px;">在这种情况下，如果没有设定背景图片，{{ cssxref("border-width") }} 计算后的值将是 </span><code style="font-style: normal; font-size: 13.63636302948px; line-height: 19.0909080505371px;">0</code><span style="font-size: 13.63636302948px; line-height: 19.0909080505371px;">，即使先前已经指定过它的值。在单元格边框重叠情况下，</span><code>hidden</code> 值优先级最高，意味着如果存在其他的重叠边框，边框不会显示。</td>
   </tr>
   <tr>
    <td style="vertical-align: middle;"><code>dotted</code></td>
    <td style="vertical-align: middle;">
     <div style="border-width: 3px; border-style: dotted; margin: 0.5em; width: 3em; height: 3em; background-color: palegreen;"></div>
    </td>
    <td style="vertical-align: middle;">显示为一系列圆点。标准中没有定义两点之间的间隔大小，<span style="font-size: 13.63636302948px; line-height: 19.0909080505371px;">视不同实现而定</span>。圆点半径是 {{ cssxref("border-width") }} 计算值的一半。</td>
   </tr>
   <tr>
    <td style="vertical-align: middle;"><code>dashed</code></td>
    <td style="vertical-align: middle;">
     <div style="border-width: 3px; border-style: dashed; margin: 0.5em; width: 3em; height: 3em; background-color: palegreen;"></div>
    </td>
    <td style="vertical-align: middle;">显示为一系列短的方形虚线。标准中没有定义线段的长度和大小，视不同实现而定。</td>
   </tr>
   <tr>
    <td style="vertical-align: middle;"><code>solid</code></td>
    <td style="vertical-align: middle;">
     <div style="border-width: 3px; border-style: solid; margin: 0.5em; width: 3em; height: 3em; background-color: palegreen;"></div>
    </td>
    <td style="vertical-align: middle;">显示为一条实线。</td>
   </tr>
   <tr>
    <td style="vertical-align: middle;"><code>double</code></td>
    <td style="vertical-align: middle;">
     <div style="border-width: 3px; border-style: double; margin: 0.5em; width: 3em; height: 3em; background-color: palegreen;"></div>
    </td>
    <td style="vertical-align: middle;">显示为一条双实线，宽度是 {{ cssxref("border-width") }} 。</td>
   </tr>
   <tr>
    <td style="vertical-align: middle;"><code>groove</code></td>
    <td style="vertical-align: middle;">
     <div style="border-width: 3px; border-style: groove; margin: 0.5em; width: 3em; height: 3em; background-color: palegreen;"></div>
    </td>
    <td style="vertical-align: middle;">显示为有雕刻效果的边框，样式与 <code>ridge</code> 相反。</td>
   </tr>
   <tr>
    <td style="vertical-align: middle;"><code>ridge</code></td>
    <td style="vertical-align: middle;">
     <div style="border-width: 3px; border-style: ridge; margin: 0.5em; width: 3em; height: 3em; background-color: palegreen;"></div>
    </td>
    <td style="vertical-align: middle;">显示为有浮雕效果的边框，样式与 <code>groove</code> 相反。</td>
   </tr>
   <tr>
    <td style="vertical-align: middle;"><code>inset</code></td>
    <td style="vertical-align: middle;">
     <div style="border-width: 3px; border-style: inset; margin: 0.5em; width: 3em; height: 3em; background-color: palegreen;"></div>
    </td>
    <td style="vertical-align: middle;">显示为有陷入效果的边框，样式与 <code>outset</code> 相反。当它指定到 {{ cssxref("border-collapse") }} 为 <code>collapsed</code> 的单元格时，会显示为 <code>groove</code> 的样式。</td>
   </tr>
   <tr>
    <td style="vertical-align: middle;"><code>outset</code></td>
    <td style="vertical-align: middle;">
     <div style="border-width: 3px; border-style: outset; margin: 0.5em; width: 3em; height: 3em; background-color: palegreen;"></div>
    </td>
    <td style="vertical-align: middle;">
     <p>显示为有突出效果的边框，样式与 <code>inset</code> 相反。当它指定到 {{ cssxref("border-collapse") }} 为 <code>collapsed</code> 的单元格时，会显示为 <code>ridge</code> 的样式。</p>
    </td>
   </tr>
  </tbody>
 </table>
 </dd>
</dl>

<h3 id="正式语法">正式语法</h3>

{{csssyntax}}

<h2 id="示例">示例</h2>

<h3 id="Table_with_all_property_values" name="Table_with_all_property_values">包含所有属性取值的表格</h3>

<p>以下是一个所有取值的例子</p>

<h4 id="HTML">HTML</h4>

<pre class="brush: html">&lt;table&gt;
    &lt;tr&gt;
        &lt;td class="b1"&gt;none&lt;/td&gt;
        &lt;td class="b2"&gt;hidden&lt;/td&gt;
        &lt;td class="b3"&gt;dotted&lt;/td&gt;
        &lt;td class="b4"&gt;dashed&lt;/td&gt;
    &lt;/tr&gt;
    &lt;tr&gt;
        &lt;td class="b5"&gt;solid&lt;/td&gt;
        &lt;td class="b6"&gt;double&lt;/td&gt;
        &lt;td class="b7"&gt;groove&lt;/td&gt;
        &lt;td class="b8"&gt;ridge&lt;/td&gt;
    &lt;/tr&gt;
    &lt;tr&gt;
        &lt;td class="b9"&gt;inset&lt;/td&gt;
        &lt;td class="b10"&gt;outset&lt;/td&gt;
    &lt;/tr&gt;
&lt;/table&gt;</pre>

<h4 id="CSS">CSS</h4>

<pre class="brush: css">/* 定义表格外观 */
table {
    border-width: 3px;
    background-color: #52E396;
}
tr, td {
    padding: 2px;
}

/* border-style 示例 */
.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;}</pre>

<h4 id="输出">输出</h4>

<p>{{ EmbedLiveSample('Table_with_all_property_values', 300, 200) }}</p>

<h2 id="规范">规范</h2>

<table class="standard-table" style="font-family: lucida grande,lucida sans unicode,dejavu sans,lucida,arial,helvetica,sans-serif; font-size: 14px; font-weight: normal; line-height: 1.572;">
 <thead>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</th>
  </tr>
 </thead>
 <tbody>
  <tr>
   <td>{{ SpecName('CSS3 Backgrounds', '#border-style', 'border-style') }}</td>
   <td>{{ Spec2('CSS3 Backgrounds') }}</td>
   <td>No change</td>
  </tr>
  <tr>
   <td>{{ SpecName('CSS2.1', 'box.html#propdef-border-style', 'border-style') }}</td>
   <td>{{ Spec2('CSS2.1') }}</td>
   <td>Added the 2-, 3- and 4-value syntaxes</td>
  </tr>
  <tr>
   <td>{{ SpecName('CSS1', '#border-style', 'border-style') }}</td>
   <td>{{ Spec2('CSS1') }}</td>
   <td></td>
  </tr>
 </tbody>
</table>

<h2 id="浏览器兼容性">浏览器兼容性</h2>

<p>{{Compat("css.properties.border-style")}}</p>



<div id="compat-mobile"></div>

<h2 id="另请参阅">另请参阅</h2>

<ul>
 <li>和边框有关的 CSS 简写属性：{{ Cssxref("border") }}, {{ Cssxref("border-width") }}, {{ Cssxref("border-color") }}, {{ Cssxref("border-radius") }}</li>
</ul>