Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
What makes unread count updated in header when I red one of the unread topics?
This code: https://github.com/NodeBB/NodeBB/blob/a9ca035e1e3d54fc457569196116871bfc8c3ba5/src/topics/unread.js#L118-L145
