---
title: Map.prototype.has()
slug: Web/JavaScript/Reference/Global_Objects/Map/has
tags:
  - ECMAScript 2015
  - JavaScript
  - Map
  - Method
  - Prototype
  - Reference
translation_of: Web/JavaScript/Reference/Global_Objects/Map/has
---
<div>{{JSRef}}</div>

<p><code><strong>has()</strong></code> 메서드는 주어진 키를 가진 요소가 <code>Map</code>에 존재하는지를 반환합니다.</p>

<div>{{EmbedInteractiveExample("pages/js/map-prototype-has.html")}}</div>



<h2 id="구문">구문</h2>

<pre class="syntaxbox"><code><em>myMap</em>.has(<em>key</em>);</code></pre>

<h3 id="매개변수">매개변수</h3>

<dl>
 <dt><code>key</code></dt>
 <dd>존재 여부를 판별할 키값.</dd>
</dl>

<h3 id="반환_값">반환 값</h3>

<p>주어진 키를 가진 요소가 있으면 <code>true</code>, 아니면 <code>false</code>.</p>

<h2 id="예제">예제</h2>

<h3 id="has()_사용하기"><code>has()</code> 사용하기</h3>

<pre class="brush: js">var myMap = new Map();
myMap.set('bar', "foo");

myMap.has('bar');  // returns true
myMap.has('baz');  // returns false
</pre>

<h2 id="명세">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-map.prototype.has', 'Map.prototype.has')}}</td>
   <td>{{Spec2('ES2015')}}</td>
   <td>Initial definition.</td>
  </tr>
  <tr>
   <td>{{SpecName('ESDraft', '#sec-map.prototype.has', 'Map.prototype.has')}}</td>
   <td>{{Spec2('ESDraft')}}</td>
   <td> </td>
  </tr>
 </tbody>
</table>

<h2 id="브라우저_호환성">브라우저 호환성</h2>



<p>{{Compat("javascript.builtins.Map.has")}}</p>

<h2 id="같이_보기">같이 보기</h2>

<ul>
 <li>{{jsxref("Map")}}</li>
 <li>{{jsxref("Map.prototype.set()")}}</li>
 <li>{{jsxref("Map.prototype.get()")}}</li>
</ul>