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+---
+title: Element.openOrClosedShadowRoot
+slug: Web/API/Element/openOrClosedShadowRoot
+translation_of: Web/API/Element/openOrClosedShadowRoot
+---
+<div>{{APIRef("Shadow DOM")}}{{Draft}}{{non-standard_header}}
+<div class="note"><strong>Note:</strong> This API is available only to <a href="https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions">WebExtensions</a>.</div>
+</div>
+
+<p><span class="seoSummary"><code>Element.openOrCloseShadowRoot</code> 是一个只读属性。represents the shadow root hosted by the element, regardless if its {{DOMxRef("ShadowRoot.mode", "mode")}} is <code>open</code> or <code>closed</code>.</span> Use {{DOMxRef("Element.attachShadow()")}} to add a shadow root to an existing element.</p>
+
+<h2 id="Syntax" name="Syntax">Syntax</h2>
+
+<pre class="syntaxbox notranslate">var <em>shadowroot =</em><em> element</em>.shadowRoot;
+</pre>
+
+<h3 id="Value">Value</h3>
+
+<p>A {{DOMxRef("ShadowRoot")}} object instance, regardless if its {{DOMxRef("ShadowRoot.mode", "mode")}} is set to <code>open</code> or <code>closed</code>, or <code>null</code> if no shadow root is present. (See {{DOMxRef("Element.attachShadow()")}} for further details).</p>
+
+<h2 id="Specifications">Specifications</h2>
+
+<p><em>This property is not part of any specification.</em></p>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+
+
+<p>{{Compat("api.Element.openOrClosedShadowRoot")}}</p>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li>{{DOMxRef("Element.shadowRoot")}}</li>
+</ul>