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The Node.hasChildNodes() method returns a Boolean value indicating whether the current Node has child nodes or not.
node.hasChildNodes()The next example removes the first child node inside the element with the id "foo" if foo has child nodes.
var foo = document.getElementById("foo");
if ( foo.hasChildNodes() ) {
foo.removeChild( foo.childNodes[0] );
}
NodeNode.appendChild()Node.cloneNode()Node.compareDocumentPosition()Node.contains()Node.getUserData()Node.hasChildNodes()Node.insertBefore()Node.isDefaultNamespace()Node.isEqualNode()Node.isSameNode()Node.isSupported()Node.lookupNamespaceURI()Node.lookupPrefix()Node.normalize()Node.removeChild()Node.replaceChild()Node.setUserData()AttrCDATASectionCharacterDataChildNodeCommentCustomEventDOMConfigurationDOMErrorDOMErrorHandlerDOMExceptionDOMImplementationDOMImplementationListDOMImplementationRegistryDOMImplementationSourceDOMLocatorDOMObjectDOMStringDOMTimeStampDOMTokenListDOMUserDataDocumentDocumentFragmentDocumentTypeElementElementTraversalEntityEntityReferenceEventEventTargetHTMLCollectionMutationObserverNodeFilterNodeIteratorNodeListNonDocumentTypeChildNodeProcessingInstructionRangeTextTimeRangesTreeWalkerXMLDocument