files/zh-cn/web/css/outline-offset/index.html


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

<h2 id="概要">概要</h2>

<p><strong><code>outline-offset</code></strong> CSS 属性用于设置 {{ cssxref("outline") }} 与一个元素边缘或边框之间的间隙。</p>

<p>outline是元素的轮廓，悬浮在元素边框之上。元素和其轮廓之间是透明的。也就是说，它们之间的颜色会继承父元素的背景色。</p>

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

<p>The space will be transparent (the parent will determine the background).</p>

<h2 id="Syntax" name="Syntax">Syntax</h2>

<pre class="brush:css">/* &lt;length&gt; values */
outline-offset: 3px;
outline-offset: 0.2em;

/* Global values */
outline-offset: inherit;
outline-offset: initial;
outline-offset: unset;
</pre>

<h3 id="Values">Values</h3>

<dl>
 <dt><code>&lt;length&gt;</code></dt>
 <dd>元素和轮廓间的宽度. 详见 {{cssxref("&lt;length&gt;")}} . 负值将轮廓绘制在元素之内.</dd>
</dl>

<h3 id="Formal_syntax">Formal syntax</h3>

{{csssyntax}}

<h2 id="Examples">Examples</h2>

<pre class="brush: css">p {
  outline: dashed thin;
  /* Move the outline 10px away from the border */
  outline-offset: 10px;
  border:1px solid black;
}
</pre>

<p>Html</p>

<pre class="brush: html">&lt;p&gt;outline: offset 10px. Border is solid and outline is dashed&lt;/p&gt;</pre>

<p>上面的代码将产生以下效果:</p>

<p>{{ EmbedLiveSample('Examples', '', '', '') }}</p>

<p>另一个例子:</p>

<p><span style="outline-offset: 1px; outline: green solid 3px;"><span style="outline-offset: 1px; outline: blue solid 3px;">outline: multiple offsets;</span></span></p>

<h2 id="Specifications">Specifications</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 Transitions', '#animatable-css', 'outline-offset') }}</td>
   <td>{{ Spec2('CSS3 Transitions') }}</td>
   <td>Defines <code>outline-offset</code> as animatable.</td>
  </tr>
  <tr>
   <td>{{ SpecName('CSS3 Basic UI', '#outline-offset', 'outline-offset') }}</td>
   <td>{{ Spec2('CSS3 Basic UI') }}</td>
   <td>Initial definition</td>
  </tr>
 </tbody>
</table>

<h2 id="Browser_Compatibility" name="Browser_Compatibility">Browser compatibility</h2>

<p>{{ CompatibilityTable() }}</p>

<div id="compat-desktop">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Chrome</th>
   <th>Firefox (Gecko)</th>
   <th>Internet Explorer</th>
   <th>Opera</th>
   <th>Safari (WebKit)</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>1.0</td>
   <td>{{CompatGeckoDesktop("1.8")}}</td>
   <td>{{ CompatNo() }}</td>
   <td>9.5</td>
   <td>1.2</td>
  </tr>
 </tbody>
</table>
</div>

<div id="compat-mobile">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Android</th>
   <th>Firefox Mobile (Gecko)</th>
   <th>IE Phone</th>
   <th>Opera Mobile</th>
   <th>Safari Mobile</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{ CompatUnknown() }}</td>
   <td>{{ CompatUnknown() }}</td>
   <td>{{ CompatUnknown() }}</td>
   <td>{{ CompatUnknown() }}</td>
   <td>{{ CompatUnknown() }}</td>
  </tr>
 </tbody>
</table>
</div>