This is a simple graph demonstrating the addition of tooltips with a hyperlink in a graph. This was written using d3.js v4 and is a follow on to the simple scatter plot example with tooltips here.
This graph is part of the code samples for the update to the book D3 Tips and Tricks to version 4 of d3.js.
forked from d3noob's block: Tooltip with link in v4
https://d3js.org/d3.v4.min.js