I hope this sequel will help you to understand how a d3-transition works, specifically when it is applied on multiple elements.
The main objective of this sequel is to illustrate that:
This sequel also illustrates:
This sequel uses D3 v3.5.5.
forked from Kcnarf's block: D3.selectAll(...).transition() Explained
Modified http://d3js.org/d3.v3.min.js to a secure url
https://d3js.org/d3.v3.min.js