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.endsWith()
+slug: Web/JavaScript/Reference/Global_Objects/String/endsWith
+tags:
+  - JavaScript
+  - Method
+  - Prototype
+  - Reference
+  - String
+  - 原型
+  - 参考
+  - 字符串
+  - 方法
+translation_of: Web/JavaScript/Reference/Global_Objects/String/endsWith
+---
+<p>{{JSRef}}</p>
+
+<p><code><strong>endsWith()</strong></code>方法用来判断当前字符串是否是以另外一个给定的子字符串“结尾”的，根据判断结果返回 <code>true</code> 或 <code>false</code>。</p>
+
+<div>{{EmbedInteractiveExample("pages/js/string-endswith.html")}}</div>
+
+
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox notranslate"><var>str</var>.endsWith(<var>searchString</var>[, <var>length</var>])</pre>
+
+<h3 id="参数">参数</h3>
+
+<dl>
+ <dt><code>searchString</code></dt>
+ <dd>要搜索的子字符串。</dd>
+ <dt><code><var>length</var></code> {{optional_inline}}</dt>
+ <dd>作为 <code>str</code> 的长度。默认值为 <code>str.length</code>。</dd>
+</dl>
+
+<h3 id="返回值">返回值</h3>
+
+<p>如果传入的子字符串在搜索字符串的末尾则返回<strong><code>true</code></strong>；否则将返回 <strong><code>false</code></strong>。</p>
+
+<h2 id="描述">描述</h2>
+
+<p>这个方法帮助你确定一个字符串是否在另一个字符串的末尾。这个方法是大小写敏感的。</p>
+
+<h2 id="Polyfill">Polyfill</h2>
+
+<p>这个方法已经加入到 ECMAScript 6 标准当中，但是可能还没有在所有的  JavaScript 实现中可用。然而，你可以通过如下的代码片段扩展 <code>String.prototype.endsWith()</code> 实现兼容：</p>
+
+<pre class="brush: js notranslate">if (!String.prototype.endsWith) {
+	String.prototype.endsWith = function(search, this_len) {
+		if (this_len === undefined || this_len &gt; this.length) {
+			this_len = this.length;
+		}
+		return this.substring(this_len - search.length, this_len) === search;
+	};
+}
+</pre>
+
+<h2 id="示例">示例</h2>
+
+<h3 id="使用_endsWith">使用 <code>endsWith()</code></h3>
+
+<pre class="brush:js; notranslate">var str = "To be, or not to be, that is the question.";
+
+alert( str.endsWith("question.") );  // true
+alert( str.endsWith("to be") );      // false
+alert( str.endsWith("to be", 19) );  // true
+</pre>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">规范</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-string.prototype.endswith', 'String.prototype.endsWith')}}</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<div class="hidden">
+<p>这个页面上的兼容性表格是通过结构化的数据自动生成的，如果你希望改进这些数据，你可以查看 <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> 并提交你的改进。 </p>
+</div>
+
+<p>{{Compat("javascript.builtins.String.endsWith")}}</p>
+
+<h2 id="参见">参见</h2>
+
+<ul>
+ <li>{{jsxref("String.prototype.startsWith()")}}</li>
+ <li>{{jsxref("String.prototype.includes()")}}</li>
+ <li>{{jsxref("String.prototype.indexOf()")}}</li>
+ <li>{{jsxref("String.prototype.lastIndexOf()")}}</li>
+</ul>
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