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---
title: MutationObserverInit.childList
slug: Web/API/MutationObserverInit/childList
translation_of: Web/API/MutationObserverInit/childList
---
<div>{{APIRef("DOM WHATWG")}}</div>
<p><span class="seoSummary">The <strong>{{domxref("MutationObserverInit")}}</strong> dictionary's optional <strong><code>childList</code></strong> property indicates whether or not to monitor the specified node or nodes for the addition or removal of new child nodes.</span></p>
<p>If <code>childList</code> is <code>false</code> (the default), adding or removing new nodes does not trigger mutation callbacks. By setting <code>childList</code> to <code>true</code>, your callback will be invoked any time nodes are added to or removed from the DOM node or nodes being watched.</p>
<h2 id="Syntax">Syntax</h2>
<pre class="syntaxbox">var <em>options</em> = {
<em>childList</em>: true | false
}
</pre>
<h3 id="Value">Value</h3>
<p>A Boolean value indicating whether or not to invoke the callback function when new nodes are added to or removed from the section of the DOM being monitored.. If {{domxref("MutationObserverInit.subtree", "subtree")}} is <code>false</code>, only the node indicated by the observer's target node is monitored for changes. Setting <code>subtree</code> to <code>true</code> causes addition or removal of nodes anywhere within the subtree rooted at <code>target</code> to be reported.</p>
<h2 id="Example">Example</h2>
<h2 id="Specifications" name="Specifications">Specifications</h2>
<table class="standard-table">
<thead>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
</thead>
<tbody>
<tr>
<td>{{SpecName('DOM WHATWG', '#dom-mutationobserverinit-childlist', 'MutationObserverInit.childList')}}</td>
<td>{{ Spec2('DOM WHATWG') }}</td>
<td> </td>
</tr>
</tbody>
</table>
<h2 id="Browser_compatibility">Browser compatibility</h2>
<div>
<p>{{Compat("api.MutationObserverInit.childList")}}</p>
</div>
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