It does. Comments have a little "[-]" next to them - click on that and the comment and its tree of descendants collapses. It was implemented nearly four months ago - here's the announcement:
If you have Javascript enabled, you should be able to now. It was implemented a few months ago. It even remembers which comments you collapsed, so it's actually better than reddit's implementation.
It does. Comments have a little "[-]" next to them - click on that and the comment and its tree of descendants collapses. It was implemented nearly four months ago - here's the announcement:
https://news.ycombinator.com/item?id=12073675