The ng2-alfresco-search component that is described here: https://github.com/Alfresco/alfresco-ng2-components/tree/master/ng2-components/ng2-alfresco-search#events-1
has the following description for nodeDbClick event:
"Emitted when user acts upon files or folders with double click only when navigation-mode is set to false, giving more freedom then just simply previewing the file"
should change to something like this:
"Emitted when a user acts upon files or folders with double click and wants to execute some other functionality than the default preview. This only works when the [navigate] property is set to 'false' and when the (nodeDbClick) event handler is implemented in the component"
Sample component code: