JavaScript Error: 'Failed to execute 'removeChild' on 'Node': The node to be removed is not a child of this node'

This error occurs when you attempt to remove a node from its parent node in JavaScript, but the node you're targeting is not actually a child of that parent node.

For instance, imagine you have a div element with the id 'parent', and you want to remove a child element with the id 'child'. If 'child' isn't actually a descendant of 'parent', you'll encounter this error when trying to remove it using the removeChild() method.

To resolve this error, ensure that the node you're trying to remove is indeed a child of the parent node. You can verify this using the contains() method, which checks whether the parent node contains the child node before attempting removal.