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+---
+title: class
+slug: Web/JavaScript/Reference/Statements/class
+tags:
+  - Classes
+  - Declaration
+  - ECMAScript6
+  - Referensi
+translation_of: Web/JavaScript/Reference/Statements/class
+---
+<div>{{jsSidebar("Statements")}}</div>
+
+<p>Deklarasi <strong>class</strong> digunakan untuk membuat class baru dengan nama menggunakan turunan berbasis prototype.</p>
+
+<div class="noinclude">
+<p>Anda juga bisa mendefinisikan kelas menggunakan{{jsxref("Operators/class", "class expression", "", 1)}}.</p>
+</div>
+
+<h2 id="Sintaks">Sintaks</h2>
+
+<pre class="brush: js">class <em>name</em> [extends] {
+  // class body
+}
+</pre>
+
+<h2 id="Deskripsi">Deskripsi</h2>
+
+<p>Seperti halnya dengan ekspresi class,  pembentuk (body) class dari deklarasi class di jalankan pada <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Strict_mode">strict mode</a>.</p>
+
+<p>Deklarasi class bukanlah {{Glossary("Hoisting", "hoisted")}} (Tidak seperti <a href="/en-US/docs/Web/JavaScript/Reference/Statements/function">function declarations</a>).</p>
+
+<h2 id="Contoh">Contoh</h2>
+
+<h3 id="Dasar_deklarasi_class">Dasar deklarasi class</h3>
+
+<p>Pada contoh, hal pertama yang kita lakukan adalah mendefinisikan class dengan nama Polygon, kemudian membentangkannya ( extend ) untuk membuat class bernama Square. Perlu diperhatikan bahwa super(), digunakan pada constructor, hanya dapat digunakan di konstruktor dan harus dipanggil setelah keyword 'this' dapat digunakan.</p>
+
+<pre class="brush: js">class Polygon {
+  constructor(height, width) {
+    this.name = 'Polygon';
+    this.height = height;
+    this.width = width;
+  }
+}
+
+class Square extends Polygon {
+  constructor(length) {
+    super(length, length);
+    this.name = 'Square';
+  }
+}</pre>
+
+<h2 id="Spesifikasi">Spesifikasi</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Spesifikasi</th>
+   <th scope="col">Status</th>
+   <th scope="col">Comment</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES6', '#sec-class-definitions', 'Class definitions')}}</td>
+   <td>{{Spec2('ES6')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-class-definitions', 'Class definitions')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td> </td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Kompabilitas_Browser">Kompabilitas Browser</h2>
+
+<p>{{CompatibilityTable}}</p>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Fitur</th>
+   <th>Chrome</th>
+   <th>Firefox (Gecko)</th>
+   <th>Internet Explorer</th>
+   <th>Opera</th>
+   <th>Safari</th>
+  </tr>
+  <tr>
+   <td>Dukungan dasar</td>
+   <td>{{CompatChrome(42.0)}}</td>
+   <td>{{CompatGeckoDesktop(45)}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+  </tr>
+  <tr>
+   <td>Array subclassing</td>
+   <td>{{CompatChrome(43.0)}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+  </tr>
+  <tr>
+   <td>Allowed in sloppy mode</td>
+   <td>{{CompatChrome(49.0)}}</td>
+   <td> </td>
+   <td> </td>
+   <td> </td>
+   <td> </td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Fitur</th>
+   <th>Android</th>
+   <th>Android Webview</th>
+   <th>Firefox Mobile (Gecko)</th>
+   <th>IE Mobile</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+   <th>Chrome for Android</th>
+  </tr>
+  <tr>
+   <td>Dukungan dasar</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatChrome(42.0)}}</td>
+   <td>{{CompatGeckoMobile(45)}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatChrome(42.0)}}</td>
+  </tr>
+  <tr>
+   <td>Array subclassing</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatChrome(43.0)}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatChrome(43.0)}}</td>
+  </tr>
+  <tr>
+   <td>Allowed in sloppy mode</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatChrome(49.0)}}</td>
+   <td> </td>
+   <td> </td>
+   <td> </td>
+   <td> </td>
+   <td>{{CompatChrome(49.0)}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="Lihat_Juga">Lihat Juga</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Web/JavaScript/Reference/Statements/function"><code>function</code> declaration</a></li>
+ <li><a href="/en-US/docs/Web/JavaScript/Reference/Operators/class"><code>class</code> expression</a></li>
+ <li><a href="/en-US/docs/Web/JavaScript/Reference/Classes">Classes</a></li>
+</ul>