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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:42:17 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:42:17 -0500
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+---
+title: Generator.prototype.next()
+slug: Web/JavaScript/Reference/Global_Objects/Generator/next
+translation_of: Web/JavaScript/Reference/Global_Objects/Generator/next
+---
+<div>{{JSRef}}</div>
+
+<p> <code><strong>next</strong></code><strong><code>()</code></strong> 메소드는 <code>done</code>과 <code>value</code> <code>프로퍼티를 가진 객체를 반환한다</code>. 또한 <code><strong>next</strong></code><strong><code>()</code> </strong><code>메소드를 호출할 때 매개변수를 제공하여 그 값을 generator에 전달할 수 있다.</code></p>
+
+<h2 id="문법">문법</h2>
+
+<pre class="syntaxbox"><code><var>gen</var>.next(value)</code></pre>
+
+<h3 id="매개_변수">매개 변수</h3>
+
+<dl>
+ <dt><code>value</code></dt>
+ <dd>Generator에 전달할 값</dd>
+</dl>
+
+<h3 id="반환값">반환값</h3>
+
+<p>두 개의 프로퍼티를 가진 <code><a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object">객체</a></code>:</p>
+
+<ul>
+ <li><code>done</code> (boolean)
+
+ <ul>
+ <li>Iterator(반복자)가 마지막 반복 작업을 마쳤을 경우 <code>true</code>. 만약 iterator(반복자)에 <em>return 값</em>이 있다면 <code>value</code>의 값으로 지정된다.</li>
+ <li>Iterator(반복자)의 작업이 남아있을 경우 <code>false</code>. Iterator(반복자)에 <code>done</code> 프로퍼티 자체를 특정짓지 않은 것과 동일하다.</li>
+ </ul>
+ </li>
+ <li><code>value</code> - Iterator(반복자)으로부터 반환되는 모든 자바스크립트 값이며 <code>done</code>이 <code>true</code>일 경우 생략될 수 있다.</li>
+</ul>
+
+<h2 id="예제">예제</h2>
+
+<h3 id="next()_사용하기"><code>next()</code> 사용하기</h3>
+
+<p>아래의 예시는 간단한 generator와 <code>next</code> 메소드를 통해서 반환되는 객체이다:</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="Generator에_값_전달하기">Generator에 값 전달하기</h3>
+
+<p>이 예시에서는 <code>next</code>가 값과 함께 호출되었다. 첫 번째 호출이 아무것도 출력하지 않은 것은 Generator가 아직 아무런 값도 <code>yield</code> 하지않았기 때문이다. (두 번째 호출과 함께 전달된 정수 2는 Generator 내부의 <code>yield</code> 키워드에 전달되어 <code>value</code>로 할당되었고 <code>console.log</code>로 출력되었다)</p>
+
+<pre class="brush: js">function* gen() {
+ while(true) {
+ var value = yield null;
+ console.log(value);
+ }
+}
+
+var g = gen();
+g.next(1);
+// "{ value: null, done: false }"
+g.next(2);
+// "{ value: null, done: false }"
+// 2
+</pre>
+
+<h2 id="Specifications">Specifications</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>Initial definition.</td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ESDraft', '#sec-generator.prototype.next', 'Generator.prototype.next')}}</td>
+ <td>{{Spec2('ESDraft')}}</td>
+ <td> </td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</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>{{CompatUnknown}}</td>
+ <td>{{CompatGeckoDesktop(26)}}</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatUnknown}}</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>{{CompatUnknown}}</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatGeckoMobile(26)}}</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatUnknown}}</td>
+ </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li><code><a href="/en-US/docs/Web/JavaScript/Reference/Statements/function*">function*</a></code></li>
+ <li><a href="/en-US/docs/Web/JavaScript/Guide/Iterators_and_Generators">Iterators and generators</a></li>
+</ul>