Adobe allows usage of Node.js in CEP extensions, if activated through the manifest.xml. I followed all steps and tried to reproduce this example from Davide Barranca: http://www.davidebarranca.com/2017/10/html-panel-tips-25-cc-2018-survival-guide/#comment-202966
But cep_node just stays undefined, whatever I do.
Already solved it myself through the manifest. Make sure that 1. The tag and have the attribute Version="7.0" 2. Make sure the required tag with its child is within the tag. In some Adobe example it's wrong.