List Booster works as an add-on on your regular out of the box Share Point list views (any lists and document libraries).
It allows you to style your list, apply color schemes, manage font-styles and colors - all on top of you regular Share Point user interface.
You can still use different Java Script hacks (i.e.
But you don't want to delete things that still have a useful life after the add-in is gone: if a list or website created by your App Installed handler is still going to be used, don't delete it in your App Uninstalling handler.
The App Upgraded event runs immediately after Share Point has finished everything that it needs to do when the add-in is updated to a new version, but before the user is notified that updating is complete.
Share Point-hosted Share Point Add-ins do not support event handling, but you can turn a workflow into a kind of list or list item event handler by setting an event to trigger the workflow. Workflows cannot be triggered by add-in events, so add-in events cannot be handled with a Share Point-hosted add-in.
To handle list and list item events, you create remote event receivers (RERs), which are web services that run externally to the Share Point farm or Share Point Online.