---
title: Node.isConnected
slug: Web/API/Node/isConnected
translation_of: Web/API/Node/isConnected
---
<p>{{APIRef("DOM")}}</p>

<p>The <strong><code>isConnected</code></strong> read-only property of the {{domxref("Node")}} interface returns a boolean indicating whether the Node is connected (directly or indirectly) to the context object, for example the {{domxref("Document")}} object in the case of the normal DOM, or the {{domxref("ShadowRoot")}} in the case of a shadow DOM.</p>

<h2 id="Синтаксис">Синтаксис</h2>

<pre class="syntaxbox">var isItConnected = nodeObjectInstance.isConnected</pre>

<h3 id="Return_value">Return value</h3>

<p>A {{domxref("Boolean")}} that is <code>true</code> if the node is connected to its relevant context object, and <code>false</code> if not.</p>

<h2 id="Пример">Пример</h2>

<p>Стандартный DOM пример:</p>

<pre class="brush: js"><code class="language-html">let test = document.createElement('p');
console.log(test.isConnected); // returns false
document.body.appendChild(test);</code>
<code class="language-html">console.log(test.isConnected); // returns true</code>
</pre>

<p>A shadow DOM example:</p>

<pre class="brush: js">// Create a shadow root
var shadow = this.attachShadow({mode: 'open'});

// Create some CSS to apply to the shadow dom
var style = document.createElement('style');
console.log(style.isConnected); // returns false

style.textContent = '.wrapper {' +
                       'position: relative;' +
                    '}' +

                     '.info {' +
                        'font-size: 0.8rem;' +
                        'width: 200px;' +
                        'display: inline-block;' +
                        'border: 1px solid black;' +
                        'padding: 10px;' +
                        'background: white;' +
                        'border-radius: 10px;' +
                        'opacity: 0;' +
                        'transition: 0.6s all;' +
                        'position: absolute;' +
                        'bottom: 20px;' +
                        'left: 10px;' +
                        'z-index: 3;' +
                      '}' +

// attach the created style element to the shadow dom

shadow.appendChild(style);
console.log(style.isConnected); // returns true</pre>

<p> </p>

<h2 id="Спецификация">Спецификация</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('DOM WHATWG','#dom-node-isconnected','isConnected')}}</td>
   <td>{{Spec2('DOM WHATWG')}}</td>
   <td>Initial definition.</td>
  </tr>
 </tbody>
</table>

<h2 id="Поддержка_Браузерами">Поддержка Браузерами</h2>

<div>


<p>{{Compat("api.Node.isConnected")}}</p>
</div>