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MutationObserverInit.childList

The MutationObserverInit dictionary's optional childList property indicates whether or not to monitor the specified node or nodes for the addition or removal of new child nodes.

If childList is false (the default), adding or removing new nodes does not trigger mutation callbacks. By setting childList to true, your callback will be invoked any time nodes are added to or removed from the DOM node or nodes being watched.

Syntax

var options = {
  childList: true | false
}

Value

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 subtree is false, only the node indicated by the observer's target node is monitored for changes. Setting subtree to true causes addition or removal of nodes anywhere within the subtree rooted at target to be reported.

Example

Specifications

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 26
26
18 — 26
Prefixed
Prefixed Requires the vendor prefix: webkit
Yes 14 11 15 7
7
6 — 7
Prefixed
Prefixed Requires the vendor prefix: webkit
Mobile
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support ? 26
26
18 — 26
Prefixed
Prefixed Requires the vendor prefix: webkit
? 14 15 7
7
6 — 7
Prefixed
Prefixed Requires the vendor prefix: webkit
?

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https://developer.mozilla.org/en-US/docs/Web/API/MutationObserverInit/childList