Example of TnT Board showing how to configure tooltips on track elements.
Modified http://d3js.org/d3.v3.min.js to a secure url
Modified http://tntvis.github.io/tnt.board/build/tnt.board.min.js to a secure url
Modified http://tntvis.github.io/tnt.tooltip/build/tnt.tooltip.min.js to a secure url
https://d3js.org/d3.v3.min.js
https://tntvis.github.io/tnt.board/build/tnt.board.min.js
https://tntvis.github.io/tnt.tooltip/build/tnt.tooltip.min.js