We have used the Code editor market place module to edit CSS, Less & JS in Sitecore 8.1 content editor, this module downloaded from the marketplace. It was working perfectly fine in our old Sitecore 8.1 version thanks to Michael West. Now we are in the process of migrating our solution to Sitecore 9.3 and facing issue
(Method not found: 'Boolean PageMode.get_IsPageEditorEditing()')
this issue due to obsolete methods in the new version of Sitecore. is there anyone who faced a similar issue? how you overcome this? did you find an alternate solution (or) any upgraded module?
Thanks for reading, looking for your input. hope Michael West can provide a better answer for this.