The Comments widget is a ready-made solution for managing comments in an app. Comments will be a good extension for project management applications, e.g. Kanban boards, and big data components like Spreadsheet. Comments can display message text, date & time, user info and an action menu.
Actions with Comments
All comments sent by the user can be edited or removed. Both actions are available in the context menu.
Hover a pointer over a comment by 'Me' and click the icon to the right of the date
Comments can be either linked to users, or not. In the latter case they all become editable and can be added by anyone.
Showing User Statuses
If knowing who is online is important for your users, you can enable displaying the user status.
Changing the Look
You can completely change the look of the Comments widget. Define your own comment box, change the comment details shown next to it, add icons, style avatars -- all this is in your hands.