---
title: outline-style
slug: Web/CSS/outline-style
tags:
  - outline-style
translation_of: Web/CSS/outline-style
---
<div>{{CSSRef}}</div>

<h2 id="概要">概要</h2>

<p><strong><code>outline-style</code></strong> CSS 属性被用于设置一个元素轮廓的样式。</p>

<p>元素轮廓是绘制于元素周围的一条线，位于{{cssxref("border")}}的外围，使元素突出</p>

<p>大多时候使用{{cssxref("outline")}}而不是<code> outline-style</code>,<code> outline-width <font face="Open Sans, arial, x-locale-body, sans-serif"><span style="background-color: #ffffff;">和</span></font></code><code> outline-color</code>会更方便.</p>

<p>{{cssinfo}}</p>

<h2 id="语法">语法</h2>

<pre class="brush:css">/* 关键字 值 */
outline-style: auto;
outline-style: none;
outline-style: dotted;
outline-style: dashed;
outline-style: solid;
outline-style: double;
outline-style: groove;
outline-style: ridge;
outline-style: inset;
outline-style: outset;

/* 全局 值*/
outline-style: inherit;
outline-style: initial;
outline-style: unset;
</pre>

<h2 id="取值">取值</h2>

<p><code>&lt;br-style&gt; </code>可为以下这些值:</p>

<dl>
 <dt>none</dt>
 <br>
 <dd>无轮廓 ({{Cssxref("outline-width")}} 为<code> 0</code>).</dd>
 <dt>dotted</dt>
 <br>
 <dd style="outline: 10px dotted red;">轮廓为一系列点.</dd>
 <dt>dashed</dt>
 <br>
 <dd style="outline: 10px dashed red;">轮廓为一系列短线.</dd>
 <dt>solid</dt>
 <br>
 <dd style="outline: 10px solid red;">轮廓为实线.</dd>
 <dt>double</dt>
 <br>
 <dd style="outline: 10px double red;">轮廓为两根有空隙的线. {{Cssxref("outline-width")}} 为线与空间的总和.</dd>
 <dt>groove</dt>
 <br>
 <dd style="outline: 10px groove red;">轮廓呈凹下状.</dd>
 <dt>ridge</dt>
 <br>
 <dd style="outline: 10px ridge red;">与<code> groove相反</code>: 轮廓呈凸起状.</dd>
 <dt>inset</dt>
 <br>
 <dd style="outline: 10px inset red;">轮廓呈嵌入状.</dd>
 <dt>outset</dt>
 <br>
 <dd style="outline: 10px outset red;">与<code> inset相反</code>: 轮廓呈突出状.</dd>
</dl>

<h3 id="正式语法">正式语法</h3>

{{csssyntax}}

<h2 id="Example_1_-_dotted_and_dashed" name="Example_1_-_dotted_and_dashed">示例 1  <code>dotted</code> 和 <code>dashed</code></h2>

<h3 id="HTML">HTML</h3>

<pre class="brush: html">&lt;div&gt;
  &lt;div class="dotted"&gt;
    &lt;p class="dashed"&gt;Outline Demo&lt;/p&gt;
  &lt;/div&gt;
&lt;/div&gt; </pre>

<h3 id="CSS">CSS</h3>

<pre class="brush: css">.dotted {
  outline-style: dotted; /* 于 "outline: dotted"等价 */
}
.dashed {
  outline-style: dashed;
}

/* 让效果更清楚 */
* { outline-width: 10px; padding: 15px; } </pre>

<p>{{ EmbedLiveSample('Example_1_-_dotted_and_dashed') }}</p>

<h2 id="Example_2_-_solid_and_double" name="Example_2_-_solid_and_double">示例 2 - <code>solid</code> 和 <code>double</code></h2>

<h3 id="HTML_2">HTML</h3>

<pre class="brush: html">&lt;div&gt;
  &lt;div class="solid"&gt;
    &lt;p class="double"&gt;Outline Demo&lt;/p&gt;
  &lt;/div&gt;
&lt;/div&gt; </pre>

<h3 id="CSS_2">CSS</h3>

<pre class="brush: css">.solid {
  outline-style: solid;
}
.double {
  outline-style: double;
}

/* 让效果更清楚 */
* { outline-width: 10px; padding: 15px; } </pre>

<p>{{ EmbedLiveSample('Example_2_-_solid_and_double') }}</p>

<h2 id="Example_3_-_groove_and_ridge" name="Example_3_-_groove_and_ridge">示例 3 - <code>groove</code> 和 <code>ridge</code></h2>

<h3 id="HTML_3">HTML</h3>

<pre class="brush: html">&lt;div&gt;
  &lt;div class="groove"&gt;
    &lt;p class="ridge"&gt;Outline Demo&lt;/p&gt;
  &lt;/div&gt;
&lt;/div&gt;</pre>

<h3 id="CSS_3">CSS</h3>

<pre class="brush: css">.groove {
  outline-style: groove;
}
.ridge {
  outline-style: ridge;
}

/* 让效果更清楚 */
* { outline-width: 10px; padding: 15px; }</pre>

<p>{{ EmbedLiveSample('Example_3_-_groove_and_ridge') }}</p>

<h2 id="Example_4_-_inset_and_outset" name="Example_4_-_inset_and_outset">示例 4 - <code>inset</code> 和 <code>outset</code></h2>

<h3 id="HTML_4">HTML</h3>

<pre class="brush: html">&lt;div&gt;
  &lt;div class="inset"&gt;
    &lt;p class="outset"&gt;Outline Demo&lt;/p&gt;
  &lt;/div&gt;
&lt;/div&gt;</pre>

<h3 id="CSS_4">CSS</h3>

<pre class="brush: css">.inset {
  outline-style: inset;
}
.outset {
  outline-style: outset;
}

/* 让效果更清楚 */
* { outline-width: 10px; padding: 15px; }</pre>

<p>{{ EmbedLiveSample('Example_4_-_inset_and_outset') }}</p>

<h2 id="规范">规范</h2>

<table class="standard-table">
 <thead>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</th>
  </tr>
 </thead>
 <tbody>
  <tr>
   <td>{{SpecName('CSS3 Basic UI', '#outline-style', 'outline-style')}}</td>
   <td>{{Spec2('CSS3 Basic UI')}}</td>
   <td>Added <code>auto</code> value</td>
  </tr>
  <tr>
   <td>{{SpecName('CSS2.1', 'ui.html#propdef-outline-style', 'outline-style')}}</td>
   <td>{{Spec2('CSS2.1')}}</td>
   <td>Initial definition</td>
  </tr>
 </tbody>
</table>

<h2 id="浏览器兼容性">浏览器兼容性</h2>

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

{{Compat("css.properties.outline-style")}}