Someone who can point me into the right direction? Code snippets? Thanks in advance!
I'm using the editMode parameter to detect and display a simple web part admin UI. When the admin clicks a particular button, I want to use CSOM to update the web part's properties for the page it is ...
This might sound a bit extreme, but now that REST / CSOM API's are more fully featured, why not just write web apps in whatever framework you're comfortable with and utilize the REST / CSOM API's ...