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: Generator.prototype.next()
+slug: Web/JavaScript/Reference/Global_Objects/Generator/next
+tags:
+  - ECMAScript 2015
+  - Generator
+  - JavaScript
+  - 原型
+  - 参考
+  - 方法
+  - 生成器
+translation_of: Web/JavaScript/Reference/Global_Objects/Generator/next
+---
+<div>{{JSRef}}</div>
+
+<p><code><strong>next</strong></code><strong><code>()</code></strong> 方法返回一个包含属性 <code>done</code> 和 <code>value</code> 的对象。该方法也可以通过接受一个参数用以向生成器传值。</p>
+
+<h2 id="Syntax" name="Syntax">语法</h2>
+
+<pre class="syntaxbox"><code><var>gen</var>.next(value)</code></pre>
+
+<h3 id="Parameters" name="Parameters">参数</h3>
+
+<dl>
+ <dt><code>value</code></dt>
+ <dd>向生成器传递的值.</dd>
+</dl>
+
+<h3 id="返回值">返回值</h3>
+
+<p>返回的<code><a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object">对象</a></code>包含两个属性:</p>
+
+<ul>
+ <li><code>done</code> (布尔类型)
+
+  <ul>
+   <li>如果迭代器超过迭代序列的末尾，则值为 <code>true</code>。 在这种情况下，<code>value</code>可选地指定迭代器的返回值。</li>
+   <li>如果迭代器能够生成序列中的下一个值，则值为<code>false</code>。 这相当于没有完全指定<code>done</code>属性。</li>
+  </ul>
+ </li>
+ <li><code>value</code> - 迭代器返回的任意的Javascript值。当 <code>done</code> 的值为 <code>true </code>时可以忽略该值。</li>
+</ul>
+
+<h2 id="示例">示例</h2>
+
+<h3 id="Example_Using_test" name="Example:_Using_test">使用 <code>next()方法</code></h3>
+
+<p>下面的例子展示了一个简单的生成器, 以及调用 <code>next</code> 后方法的返回值:</p>
+
+<pre class="brush: js">function* gen() {
+  yield 1;
+  yield 2;
+  yield 3;
+}
+
+var g = gen(); // "Generator { }"
+g.next();      // "Object { value: 1, done: false }"
+g.next();      // "Object { value: 2, done: false }"
+g.next();      // "Object { value: 3, done: false }"
+g.next();      // "Object { value: undefined, done: true }"
+</pre>
+
+<h3 id="向生成器传值">向生成器传值</h3>
+
+<p>在此示例中，使用值调用<code>next</code>。 请注意，第一次调用没有记录任何内容，因为生成器最初没有产生任何结果。</p>
+
+<pre><code>function* gen() {
+  while(true) {
+    var value = yield null;
+    console.log(value);
+  }
+}
+
+var g = gen();
+g.next(1);
+// "{ value: null, done: false }"
+g.next(2);
+// 2
+// "{ value: null, done: false }"</code>
+</pre>
+
+<h2 id="Specifications" name="Specifications">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-generator.prototype.next', 'Generator.prototype.next')}}</td>
+   <td>{{Spec2('ES6')}}</td>
+   <td>初始定义</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-generator.prototype.next', 'Generator.prototype.next')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td>草案</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility" name="Browser_compatibility">浏览器兼容性</h2>
+
+<div>{{CompatibilityTable}}</div>
+
+<div>
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Chrome</th>
+   <th>Edge</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>13</td>
+   <td>{{CompatGeckoDesktop(26)}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatSafari(10)}}</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>5.1</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatGeckoMobile(26)}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>10</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+</div>
+
+<h2 id="See_also" name="See_also">相关链接</h2>
+
+<ul>
+ <li><code><a href="/en-US/docs/Web/JavaScript/Reference/Statements/function*">function*</a></code></li>
+ <li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Iterators_and_Generators">Iterators and generators</a></li>
+</ul>
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