This module is not yet implemented in D3 4.0, but I’m working on it.
For consistency with [*arc*.padAngle](https://github.com/d3/d3-shape#arc_padAngle), *chord*.padding has also been renamed to [*ribbon*.padAngle](https://github.com/d3/d3-chord#ribbon_padAngle).
* d3.svg.chord ↦ d3.ribbon
* d3.layout.chord ↦ d3.chord
A new [*ribbon*.context](https://github.com/d3/d3-chord#ribbon_context) method lets you render chord diagrams to Canvas! See also [d3-path](#paths-d3-path).