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+---
+title: Document.registerElement()
+slug: Web/API/Document/registerElement
+translation_of: Web/API/Document/registerElement
+---
+<p>{{APIRef("DOM")}}</p>
+
+<p>{{draft()}}</p>
+
+<p>Метод <code><strong>Document.registerElement()</strong></code> регистрирует новый кастомный элемент (<a href="/en-US/docs/Web/Web_Components/Custom_Elements">custom element</a>) в браузере и возвращает конструктор для этого нового элемента.</p>
+
+<div class="note">
+<p><strong>Примечание:</strong> Это экспериментальная технология . Браузер который вы используете должен поддерживать Вэб Компоненты (Web Components). Смотри больше: <a href="/en-US/docs/Web/Web_Components#Enabling_Web_Components_in_Firefox">Enabling Web Components in Firefox</a>.</p>
+</div>
+
+<h2 id="Syntax">Syntax</h2>
+
+<pre class="syntaxbox">var <em>constructor</em> = document.registerElement(<em>tag-name</em>, <em>options</em>);</pre>
+
+<h3 id="Parameters">Parameters</h3>
+
+<dl>
+ <dt><em>tag-name</em></dt>
+ <dd>Имя кастомного элемента. Имя должно содержать символ дефиса (-), например: <code>my-tag</code>.</dd>
+ <dt><em>options {{optional_inline}}</em></dt>
+ <dd>An object that names the prototype to base the custom element on, and an existing tag to extend. Both of these are optional.</dd>
+</dl>
+
+<h2 id="Example">Example</h2>
+
+<p>Here is a very simple example:</p>
+
+<pre class="brush: js">var Mytag = document.registerElement('my-tag');
+</pre>
+
+<p>Now the new tag is registered in the browser. The <code>Mytag</code> variable holds a constructor that you can use to create a <code>my-tag</code> element in the document as follows:</p>
+
+<pre class="brush: js">document.body.appendChild(new Mytag());</pre>
+
+<p>This inserts an empty <code>my-tag</code> element that will be visible if you use the browser's developer tools. It will not be visible if you use the browser's view source capability. And it won't be visible in the browser unless you add some content to the tag. Here is one way to add content to the new tag:</p>
+
+<pre class="brush: js">var mytag = document.getElementsByTagName("my-tag")[0];
+mytag.textContent = "I am a my-tag element.";
+</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('Custom Elements')}}</td>
+   <td>{{Spec2('Custom Elements')}}</td>
+   <td>Initial definition</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+<p>{{CompatibilityTable}}</p>
+
+<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>35</td>
+   <td>31 (behind a flag)</td>
+   <td>{{CompatNo}}</td>
+   <td>25</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>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>4.4.4</td>
+   <td>31 (behind a flag)</td>
+   <td>{{CompatNo}}</td>
+   <td>25</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li> </li>
+</ul>