From 33058f2b292b3a581333bdfb21b8f671898c5060 Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Tue, 8 Dec 2020 14:40:17 -0500
Subject: initial commit

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+---
+title: String.prototype.sup()
+slug: Web/JavaScript/Reference/Global_Objects/String/sup
+tags:
+  - String.prototype.sup()
+translation_of: Web/JavaScript/Reference/Global_Objects/String/sup
+---
+<div>{{JSRef}} {{deprecated_header}}</div>
+
+<p><strong><code>sup()</code></strong>方法创建 一个{{HTMLElement("sup")}}HTML 元素，使字符串显示为上标。</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox"><code><var>str</var>.sup()</code></pre>
+
+<h3 id="返回值">返回值</h3>
+
+<p>包含{{HTMLElement("sup")}} HTML 元素的字符串。</p>
+
+<h2 id="描述">描述</h2>
+
+<p><code>sup()</code> 方法将字符串嵌入 <code>&lt;sup&gt;</code> 标签中：<code>"&lt;sup&gt;str&lt;/sup&gt;"</code>.</p>
+
+<h2 id="示例">示例</h2>
+
+<h3 id="使用sub()和sup()方法">使用<code>sub()</code>和<code>sup()</code>方法</h3>
+
+<p>下面的示例使用了{{jsxref("String.prototype.sub()", "sub()")}}和<code>sup()</code>方法来格式化字符串：</p>
+
+<pre class="brush: js">var superText = 'superscript';
+var subText = 'subscript';
+
+console.log('This is what a ' + superText.sup() + ' looks like.');
+// "这就是&lt;sup&gt;superscript&lt;/sup&gt;的样子。"
+
+console.log('This is what a ' + subText.sub() + ' looks like.');
+// "这就是&lt;sub&gt;subscript&lt;/sub&gt;的样子。"
+</pre>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Status</th>
+   <th scope="col">Comment</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES6', '#sec-string.prototype.sup', 'String.prototype.sup')}}</td>
+   <td>{{Spec2('ES6')}}</td>
+   <td>初始定义。在 JavaScript 1.0 中实现。在（规范性）附件 B 中定义为用于 Web 浏览器的 ECMAScript 附加特性。</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-string.prototype.sup', 'String.prototype.sup')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td>在（规范性）附件 B 中定义为用于 Web 浏览器的 ECMAScript 附加特性。</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<div>{{CompatibilityTable}}</div>
+
+<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>{{CompatVersionUnknown}}</td>
+   <td>{{CompatGeckoDesktop("1.0")}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</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>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatGeckoMobile("1.0")}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="另见">另见</h2>
+
+<ul>
+ <li>{{jsxref("String.prototype.sub()")}}</li>
+</ul>
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