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+---
+title: <display-outside>
+slug: Web/CSS/display-outside
+translation_of: Web/CSS/display-outside
+---
+<div>{{CSSRef}}</div>
+
+<p class="summary">The <code>&lt;display-outside&gt;</code> keywords specify the element’s outer {{CSSxRef("display")}} type, which is essentially its role in flow layout. These keywords are used as values of the <code>display</code> property, and can be used for legacy purposes as a single keyword, or as defined in the Level 3 specification alongside a value from the {{CSSxRef("&lt;display-inside&gt;")}} keywords.</p>
+
+<h2 id="语法">语法</h2>
+
+<p> <code>&lt;display-outside&gt;</code> 的可用值：</p>
+
+<dl>
+ <dt><code>block</code></dt>
+ <dd>这个值会生成一个块级元素盒子，同时在该元素之前和之后打断（换行）。简单来说就是，这个值会将该元素变成<a href="https://developer.mozilla.org/zh-CN/docs/Web/HTML/Block-level_elements">块级元素</a>。</dd>
+ <dt><code>inline</code></dt>
+ <dd>这个值会生成一个行内元素盒子，该元素之前和之后不会打断（换行）。如果空间充足，该元素后的元素将会在同一行显示。简单来说就是，这个值会将该元素变成<a href="https://developer.mozilla.org/zh-CN/docs/Web/HTML/Inline_elements">行内元素</a>。</dd>
+ <dt><code>run-in</code> {{Experimental_Inline}}</dt>
+ <dd>这个值生成一个run-in盒子。如果其后的兄弟元素是块级盒子，那么这个run-in盒子就会以兄弟元素的第一个行内元素盒子的形式存在；如果其后的兄弟元素是行内元素，那么这个run-in盒子会变成块级元素。</dd>
+ <dd>run-in元素的存在形式取决于相邻的元素，如果它的内部存在block box，那么它会变成块级元素盒子。</dd>
+</dl>
+
+<div class="note">
+<p><strong>Note</strong>: Browsers that support the two value syntax, on finding the outer value only, such as when <code>display: block</code> or <code>display: inline</code> is specified, will set the inner value to <code>flow</code>. This will result in expected behavior; for example if you specify an element to be block, you would expect that the children of that element would participate in block and inline normal flow layout.</p>
+</div>
+
+<h2 id="举例">举例</h2>
+
+<p>In the following example, span elements (normally displayed as inline elements) are set to <code>display: block</code> and so break onto new lines and expand to fill their container in the inline dimension.</p>
+
+<h3 id="HTML">HTML</h3>
+
+<pre class="brush: html notranslate">&lt;span&gt;span 1&lt;/span&gt;
+&lt;span&gt;span 2&lt;/span&gt;</pre>
+
+<h3 id="CSS">CSS</h3>
+
+<pre class="brush: css notranslate">span {
+    display: block;
+    border: 1px solid rebeccapurple;
+}</pre>
+
+<h3 id="Result">Result</h3>
+
+<p>{{EmbedLiveSample("Examples", 300, 60)}}</p>
+
+<h2 id="Specifications" name="Specifications">Specifications</h2>
+
+<table class="standard-table">
+ <thead>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Status</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td>{{SpecName('CSS3 Display', '#typedef-display-outside', 'display-outside')}}</td>
+   <td>{{Spec2('CSS3 Display')}}</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<div class="hidden">The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out <a class="external" href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> and send us a pull request.</div>
+
+<p>{{Compat("css.properties.display.display-outside", 10)}}</p>
+
+<h2 id="其它">其它</h2>
+
+<ul>
+ <li>{{CSSxRef("display")}}
+  <ul>
+   <li>{{CSSxRef("&lt;display-inside&gt;")}}</li>
+   <li>{{CSSxRef("&lt;display-listitem&gt;")}}</li>
+   <li>{{CSSxRef("&lt;display-internal&gt;")}}</li>
+   <li>{{CSSxRef("&lt;display-box&gt;")}}</li>
+   <li>{{CSSxRef("&lt;display-legacy&gt;")}}</li>
+  </ul>
+ </li>
+ <li><a href="/en-US/docs/Web/CSS/CSS_Flow_Layout/Block_and_Inline_Layout_in_Normal_Flow">Block and Inline layout in Normal Flow</a></li>
+ <li><a href="/en-US/docs/Web/CSS/CSS_Flow_Layout/Formatting_Contexts_Explained">Formatting Contexts explained</a></li>
+</ul>