Example of different label types in TnT Tree.
Modified http://d3js.org/d3.v3.min.js to a secure url
Modified http://tntvis.github.io/tnt.tree/build/tnt.tree.min.js to a secure url
https://d3js.org/d3.v3.min.js
https://tntvis.github.io/tnt.tree/build/tnt.tree.min.js