Edit Nevermind, I actually got it figured out.
Sorry to necro this, but I was just looking into this repo when I came across this post. I have a wordpress site and I wanted to embed my NodeBB forum into it. I have it embeded, I was just looking for a way to resize the frame automatically when I found this. I have the wordpress side of things setup, I was just trying to see if there were any examples of this forum being in the iframe as opposed to a frame being within a post on the board.
Was anything ever figured out, or were you able to make it work at all with the way you were attempting to do it, here?
Oops. Didn't see this one. Try what @pitaj said and hopefully it should work. IIRC the hooks in that plugin should still be valid in the current release, I just haven't updated the nbb package manager version for 0.8.2 yet