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authorFlorian Merz <me@fiji-flo.de>2021-02-11 12:56:40 +0100
committerFlorian Merz <me@fiji-flo.de>2021-02-11 12:56:40 +0100
commit310fd066e91f454b990372ffa30e803cc8120975 (patch)
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parent8260a606c143e6b55a467edf017a56bdcd6cba7e (diff)
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+---
+title: String.prototype.trimRight()
+slug: Web/JavaScript/Reference/Global_Objects/String/TrimRight
+tags:
+ - JavaScript
+ - Method
+ - Prototype
+ - String
+translation_of: Web/JavaScript/Reference/Global_Objects/String/trimEnd
+---
+<div>{{JSRef}}</div>
+
+<p><code><strong>trimEnd()</strong> </code>方法从一个字符串的末端移除空白字符。trimRight() 是这个方法的别名。</p>
+
+<p>{{EmbedInteractiveExample("pages/js/string-trimend.html")}}</p>
+
+<p>The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone <a href="https://github.com/mdn/interactive-examples">https://github.com/mdn/interactive-examples</a> and send us a pull request.</p>
+
+<h2 id="Syntax" name="Syntax">语法</h2>
+
+<pre class="syntaxbox"><code><var>str</var>.trimEnd();
+<var>str</var>.trimRight();</code></pre>
+
+<h3 id="返回值">返回值</h3>
+
+<p>一个新字符串,表示从调用字串的末(右)端除去空白。</p>
+
+<h2 id="Description" name="Description">描述</h2>
+
+<p><code>trimEnd()</code> / <code>trimRight()</code>方法移除原字符串右端的连续空白符并返回,<code>trimEnd()</code> / <code>trimRight()</code>方法并不会直接修改原字符串本身。</p>
+
+<h3 id="别名">别名</h3>
+
+<p>为了与 {{jsxref("String.prototype.padEnd")}} 等函数保持一致,标准方法名称为<code>trimEnd</code>。 但是,出于Web兼容性原因,<code>trimRight</code>仍然是<code>trimEnd</code>的别名。 在某些引擎中,这意味着:</p>
+
+<pre class="brush: js"><code>String.prototype.trimRight.name === "trimEnd";</code>
+</pre>
+
+<h2 id="Examples" name="Examples">示例</h2>
+
+<h3 id="使用trimEnd">使用<code>trimEnd()</code></h3>
+
+<p>下面的例子输出了小写的字符串"   foo":</p>
+
+<pre class="brush:js;highlight:[5]">var str = " foo ";
+
+alert(str.length); // 8
+
+str = str.trimRight(); // 或写成str = str.trimEnd();
+console.log(str.length); // 6
+console.log(str); // ' foo'
+</pre>
+
+<h2 id="Specifications">Specifications</h2>
+
+<table>
+ <thead>
+ <tr>
+ <th scope="col">Specification</th>
+ <th scope="col">Status</th>
+ <th scope="col">Comment</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td><code><a href="https://github.com/tc39/proposal-string-left-right-trim/#stringprototypetrimstart--stringprototypetrimend">String.prototype.{trimStart,trimEnd}</a></code>proposal</td>
+ <td>Stage 4</td>
+ <td>Expected to be part of ES2019</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+<p>The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> and send us a pull request.</p>
+
+<p>{{Compat("javascript.builtins.String.trimEnd")}}</p>
+
+<h2 id="See_also" name="See_also">相关链接</h2>
+
+<ul>
+ <li>{{jsxref("String.prototype.trim()")}}</li>
+ <li>{{jsxref("String.prototype.trimStart()")}}</li>
+</ul>