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+---
+title: <mspace>
+slug: Web/MathML/Element/mspace
+translation_of: Web/MathML/Element/mspace
+---
+<div>{{MathMLRef}}</div>
+
+<p class="summary">MathML&lt;mspace&gt;元素用来表示一段空白，空白的大小由它自身的属性决定。</p>
+
+<h2 id="属性">属性</h2>
+
+<dl>
+ <dt id="attr-class-id-style">class, id, style</dt>
+ <dd>用来供<a href="/en-US/docs/CSS">样式表</a>使用。</dd>
+ <dt id="attr-depth">depth</dt>
+ <dd>空白在基线下方的高度 (参阅 <a href="/en-US/docs/MathML/Attributes/Values#Lengths">length</a>).</dd>
+ <dt id="attr-height">height</dt>
+ <dd>空白在基线上方的高度 (参阅 <a href="/en-US/docs/MathML/Attributes/Values#Lengths">length</a>).</dd>
+ <dt id="attr-linebreak">linebreak</dt>
+ <dd>Indicates a line-break at the space. Possible values: <code>auto</code> (default value), <code>newline</code>, <code>nobreak</code>, <code>goodbreak</code>, <code>badbreak</code>.<br>
+ Starting with MathML 3, it is preferred to use {{ MathMLElement("mo") }} to control linebreaking.</dd>
+ <dt id="attr-mathbackground">mathbackground</dt>
+ <dd>用来设置背景色，可以使用<code><strong>#rgb</strong></code>、<strong><code>#rrggbb</code></strong>或者<a href="/zh-CN/docs/Web/CSS/color_value">HTML颜色名</a>。</dd>
+ <dt id="attr-width">width</dt>
+ <dd>空白的宽度 (参阅 <a href="/en-US/docs/MathML/Attributes/Values#Lengths">length</a>).</dd>
+</dl>
+
+<p>注意，一些像<code>mathcolor</code>、<code>mathvariant</code>或<code>dir</code>这种常用的属性在<code>&lt;mspace&gt;</code>上是无效的。</p>
+
+<h2 id="例子">例子</h2>
+
+<pre class="brush: html">&lt;math&gt;
+
+  &lt;mspace depth="40px" height="20px" /&gt;
+
+  &lt;mspace width="100px" /&gt;
+
+&lt;/math&gt;
+</pre>
+
+<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('MathML3', 'chapter3.html#presm.mspace', 'mspace') }}</td>
+   <td>{{ Spec2('MathML3') }}</td>
+   <td>Current specification</td>
+  </tr>
+  <tr>
+   <td>{{ SpecName('MathML2', 'chapter3.html#presm.mspace', 'mspace') }}</td>
+   <td>{{ Spec2('MathML2') }}</td>
+   <td>Initial specification</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</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</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatNo}}</td>
+   <td>{{ CompatGeckoDesktop("1.0") }}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+  <tr>
+   <td><code>linebreak</code></td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+  <tr>
+   <td><code>depth</code>, <code>height</code>, <code>width</code></td>
+   <td>{{CompatNo}}</td>
+   <td>{{ CompatGeckoDesktop("1.0") }}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Android</th>
+   <th>Chrome for Android</th>
+   <th>Firefox Mobile (Gecko)</th>
+   <th>IE Mobile</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{ CompatGeckoMobile("1.9.2") }}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+  <tr>
+   <td><code>linebreak</code></td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+  <tr>
+   <td><code>depth</code>, <code>height</code>, <code>width</code></td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{ CompatGeckoMobile("1.9.2") }}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="Gecko说明">Gecko说明</h2>
+
+<ul>
+ <li><a class="external" href="http://www.w3.org/TR/MathML3/chapter3.html#presm.lbindent.attrs" title="http://www.w3.org/TR/MathML3/chapter3.html#presm.lbindent.attrs">Indentation attributes</a> 暂时没有实现 (for Gecko see {{ bug("534962") }}).</li>
+ <li>从Gecko 23.0 {{geckoRelease("23.0")}}开始实现了对<code>width</code>属性负值的支持。</li>
+</ul>
+
+<h2 id="相关链接">相关链接</h2>
+
+<ul>
+ <li>{{ MathMLElement("mpadded") }}</li>
+ <li>{{ MathMLElement("mphantom") }}</li>
+</ul>