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+---
+title: CustomElementRegistry.get()
+slug: Web/API/CustomElementRegistry/get
+tags:
+  - CustomElementRegistry
+  - Experimental
+  - Web Components
+  - custom elements
+translation_of: Web/API/CustomElementRegistry/get
+---
+<p>{{APIRef("CustomElementRegistry")}}</p>
+
+<p><span class="seoSummary"> {{domxref("CustomElementRegistry")}} 的<code><strong>get()</strong></code>方法返回以前定义自定义元素的构造函数.</span></p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox"><em>constructor</em> = customElements.get(<em>name</em>);
+</pre>
+
+<h3 id="参数">参数</h3>
+
+<dl>
+ <dt>name</dt>
+ <dd>你想要返回引用的构造函数的自定义元素的名字。</dd>
+</dl>
+
+<h3 id="返回值">返回值</h3>
+
+<p>指定名字的自定义元素的构造函数，如果没有使用该名称的自定义元素定义，则为<code>undefined</code>。</p>
+
+<h2 id="例子">例子</h2>
+
+<pre class="brush: js">customElements.define('my-paragraph',
+  class extends HTMLElement {
+    constructor() {
+      super();
+      let template = document.getElementById('my-paragraph');
+      let templateContent = template.content;
+
+      const shadowRoot = this.attachShadow({mode: 'open'})
+        .appendChild(templateContent.cloneNode(true));
+  }
+})
+
+// Return a reference to the my-paragraph constructor
+<span class="message-body-wrapper"><span class="message-flex-body"><span class="devtools-monospace message-body">let ctor = customElements.get('my-paragraph');</span></span></span>
+</pre>
+
+<h2 id="规范">规范</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("HTML WHATWG", "custom-elements.html#dom-customelementregistry-get", "customElements.get()")}}</td>
+   <td>{{Spec2("HTML WHATWG")}}</td>
+   <td>Initial definition.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<div>
+
+
+<p>{{Compat("api.CustomElementRegistry.get")}}</p>
+</div>