Most of the B2B Application will need an Document Editor embedded in the web application. Client asks you to develop an Document Management application where user can edit the document template or create a new document. user can also drag and drop different components like heading,title and Table etc.
Save the Document in Database and load it after page refresh. you can also use web sockets to make it real time.
Develop an Application with the above problem scenario. take PandaDoc for reference