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+---
+title: Array.prototype.fill()
+slug: Web/JavaScript/Reference/Global_Objects/Array/fill
+tags:
+  - Array
+  - ECMAScript 2015
+  - JavaScript
+  - Method
+  - Prototype
+  - polyfill
+translation_of: Web/JavaScript/Reference/Global_Objects/Array/fill
+---
+<div>{{JSRef}}</div>
+
+<p><code><strong>fill()</strong></code> 메서드는 배열의 시작 인덱스부터 끝 인덱스의 이전까지 정적인 값 하나로 채웁니다.</p>
+
+<p>{{EmbedInteractiveExample("pages/js/array-fill.html")}}</p>
+
+<h2 id="Syntax" name="Syntax">구문</h2>
+
+<pre class="syntaxbox"><code><var>arr</var>.fill(<var>value</var>[, <var>start<var>[, <var>end</var>]])</var></var></code></pre>
+
+<h3 id="Parameters" name="Parameters">매개변수</h3>
+
+<dl>
+ <dt><code>value</code></dt>
+ <dd>배열을 채울 값.</dd>
+ <dt><code>start</code> {{optional_inline}}</dt>
+ <dd>시작 인덱스, 기본 값은 0.</dd>
+ <dt><code>end</code> {{optional_inline}}</dt>
+ <dd>끝 인덱스, 기본 값은 <code>this.length</code>.</dd>
+</dl>
+
+<h3 id="반환_값">반환 값</h3>
+
+<p>변형한 배열.</p>
+
+<h2 id="Description" name="Description">설명 </h2>
+
+<p><code>fill</code> 메서드는 <code>value</code>, <code>start</code>, <code>end</code>의 3개 인자를 가집니다. <code>start</code>와 <code>end</code> 인자는 선택 사항으로써 기본값으로 각각 <code>0</code>과, <code>this</code> 객체의 <code>length</code>를 가집니다.</p>
+
+<p><code>length</code>가 배열의 길이일 때, <code>start</code>가 음수이면 시작 인덱스는 <code>length+start</code>입니다. <code>end</code>가 음수이면 끝 인덱스는 <code>length+end</code>입니다.</p>
+
+<p><code>fill</code>은 일반 함수이며, <code>this</code> 값이 배열 객체일 필요는 없습니다.</p>
+
+<p><code>fill</code> 메서드는 변경자 메서드로, 복사본이 아니라 <code>this</code> 객체를 변형해 반환합니다.</p>
+
+<p><code>value</code>에 객체를 받을 경우 그 참조만 복사해서 배열을 채웁니다.</p>
+
+<h2 id="Examples" name="Examples">예제</h2>
+
+<pre class="brush: js">[1, 2, 3].fill(4);               // [4, 4, 4]
+[1, 2, 3].fill(4, 1);            // [1, 4, 4]
+[1, 2, 3].fill(4, 1, 2);         // [1, 4, 3]
+[1, 2, 3].fill(4, 1, 1);         // [1, 2, 3]
+[1, 2, 3].fill(4, 3, 3);         // [1, 2, 3]
+[1, 2, 3].fill(4, -3, -2);       // [4, 2, 3]
+[1, 2, 3].fill(4, NaN, NaN);     // [1, 2, 3]
+[1, 2, 3].fill(4, 3, 5);         // [1, 2, 3]
+Array(3).fill(4);                // [4, 4, 4]
+[].fill.call({ length: 3 }, 4);  // {0: 4, 1: 4, 2: 4, length: 3}
+
+// Objects by reference.
+var arr = Array(3).fill({}); // [{}, {}, {}]
+arr[0].hi = "hi"; // [{ hi: "hi" }, { hi: "hi" }, { hi: "hi" }]
+</pre>
+
+<h2 id="Polyfill" name="Polyfill">폴리필</h2>
+
+<pre><code>if (!Array.prototype.fill) {
+  Object.defineProperty(Array.prototype, 'fill', {
+    value: function(value) {
+
+      // Steps 1-2.
+      if (this == null) {
+        throw new TypeError('this is null or not defined');
+      }
+
+      var O = Object(this);
+
+      // Steps 3-5.
+      var len = O.length &gt;&gt;&gt; 0;
+
+      // Steps 6-7.
+      var start = arguments[1];
+      var relativeStart = start &gt;&gt; 0;
+
+      // Step 8.
+      var k = relativeStart &lt; 0 ?
+        Math.max(len + relativeStart, 0) :
+        Math.min(relativeStart, len);
+
+      // Steps 9-10.
+      var end = arguments[2];
+      var relativeEnd = end === undefined ?
+        len : end &gt;&gt; 0;
+
+      // Step 11.
+      var final = relativeEnd &lt; 0 ?
+        Math.max(len + relativeEnd, 0) :
+        Math.min(relativeEnd, len);
+
+      // Step 12.
+      while (k &lt; final) {
+        O[k] = value;
+        k++;
+      }
+
+      // Step 13.
+      return O;
+    }
+  });
+}</code></pre>
+
+<h2 id="Specifications" name="Specifications">명세</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('ES2015', '#sec-array.prototype.fill', 'Array.prototype.fill')}}</td>
+   <td>{{Spec2('ES2015')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-array.prototype.fill', 'Array.prototype.fill')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td> </td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility" name="Browser_compatibility">브라우저 호환성</h2>
+
+<div>{{Compat("javascript.builtins.Array.fill")}}</div>
+
+<h2 id="같이_보기">같이 보기</h2>
+
+<ul>
+ <li>{{jsxref("Array")}}</li>
+ <li>{{jsxref("TypedArray.prototype.fill()")}}</li>
+</ul>