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diff --git a/files/zh-cn/web/mathml/element/msub/index.html b/files/zh-cn/web/mathml/element/msub/index.html new file mode 100644 index 0000000000..8acea4f5bb --- /dev/null +++ b/files/zh-cn/web/mathml/element/msub/index.html @@ -0,0 +1,197 @@ +--- +title: <msub> +slug: Web/MathML/Element/msub +translation_of: Web/MathML/Element/msub +--- +<div>{{MathMLRef}}</div> + +<p class="summary">MathML<code><strong><msub></strong></code>元素用来为表达式加下标，语法如下：<code><strong><msub> base subscript </msub></strong></code>。</p> + +<h2 id="属性">属性</h2> + +<dl> + <dt id="attr-class-id-style">class, id, style</dt> + <dd>供<a href="/en-US/docs/CSS">样式表</a>使用。</dd> + <dt id="attr-href">href</dt> + <dd>用来设置标签点击后跳转的链接。</dd> + <dt id="attr-mathbackground">mathbackground</dt> + <dd>用来设置标签的背景色，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-mathcolor">mathcolor</dt> + <dd>用来设置标签文字的颜色，同样可以使用<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-subscriptshift">subscriptshift</dt> + <dd>用来设置下标相对于表达式的基线的最小距离，它是一个<a href="/en-US/docs/MathML/Attributes/Values#Lengths">长度值</a>。</dd> +</dl> + +<h2 id="例子">例子</h2> + +<p>下述代码表示：<img alt="x1" src="/files/3202/msub.png" style="margin-left: 10px; vertical-align: middle;"></p> + +<p>您的浏览器的渲染结果： <math> <msub> <mi>X</mi> <mn>1</mn> </msub> </math></p> + +<pre class="brush: html"><math> + + <msub> + <mi>X</mi> + <mn>1</mn> + </msub> + +</math> +</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.msub', 'msub') }}</td> + <td>{{ Spec2('MathML3') }}</td> + <td>Current specification</td> + </tr> + <tr> + <td>{{ SpecName('MathML2', 'chapter3.html#presm.msub', 'msub') }}</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>5.1</td> + </tr> + <tr> + <td><code>href</code></td> + <td>{{CompatNo}}</td> + <td>{{ CompatGeckoDesktop("7.0") }}</td> + <td>{{ CompatNo() }}</td> + <td>{{CompatNo}}</td> + <td>{{CompatNo}}</td> + </tr> + <tr> + <td><code>mathbackground</code></td> + <td>{{CompatNo}}</td> + <td>{{ CompatGeckoDesktop("2.0") }}</td> + <td>{{ CompatNo() }}</td> + <td>{{CompatNo}}</td> + <td>5.1</td> + </tr> + <tr> + <td><code>mathcolor</code></td> + <td>{{CompatNo}}</td> + <td>{{ CompatGeckoDesktop("2.0") }}</td> + <td>{{ CompatNo() }}</td> + <td>{{CompatNo}}</td> + <td>5.1</td> + </tr> + <tr> + <td><code>subscriptshift</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("1.0") }}</td> + <td>{{ CompatNo() }}</td> + <td>{{ CompatNo() }}</td> + <td>{{ CompatNo() }}</td> + </tr> + <tr> + <td><code>href</code></td> + <td>{{ CompatNo() }}</td> + <td>{{ CompatNo() }}</td> + <td>{{ CompatGeckoMobile("7.0") }}</td> + <td>{{ CompatNo() }}</td> + <td>{{ CompatNo() }}</td> + <td>{{ CompatNo() }}</td> + </tr> + <tr> + <td><code>mathbackground</code></td> + <td>{{ CompatNo() }}</td> + <td>{{ CompatNo() }}</td> + <td>{{ CompatGeckoMobile("2.0") }}</td> + <td>{{ CompatNo() }}</td> + <td>{{ CompatNo() }}</td> + <td>{{ CompatNo() }}</td> + </tr> + <tr> + <td><code>mathcolor</code></td> + <td>{{ CompatNo() }}</td> + <td>{{ CompatNo() }}</td> + <td>{{ CompatGeckoMobile("2.0") }}</td> + <td>{{ CompatNo() }}</td> + <td>{{ CompatNo() }}</td> + <td>{{ CompatNo() }}</td> + </tr> + <tr> + <td><code>subscriptshift</code></td> + <td>{{ CompatNo() }}</td> + <td>{{ CompatNo() }}</td> + <td>{{ CompatGeckoMobile("1.0") }}</td> + <td>{{ CompatNo() }}</td> + <td>{{ CompatNo() }}</td> + <td>{{ CompatNo() }}</td> + </tr> + </tbody> +</table> +</div> + +<h2 id="关于Gecko的特殊说明">关于Gecko的特殊说明</h2> + +<ul> + <li>从Gecko 26.0 {{geckoRelease("26")}}开始，不允许使用<none />作为子元素。The rendering has been made more consistent with equivalent configurations of {{MathMLElement("msup")}} and {{MathMLElement("mmultiscripts")}} and a bug with an incorrect application <code>of the </code><code>superscriptshift</code> attribute has been fixed (see {{bug("827713")}} for details).</li> +</ul> + +<h2 id="相关链接">相关链接</h2> + +<ul> + <li>{{ MathMLElement("msup") }} (Superscript)</li> + <li>{{ MathMLElement("msubsup") }} (Subscript-superscript pair)</li> + <li>{{ MathMLElement("mmultiscripts") }} (Prescripts and tensor indices)</li> +</ul> |