Multipart Sankey Diagrams

Extended from Mike Bostock's original d3.sankey.

npm install d3-sankey-multipart

var sankey = d3.sankey()
    .size([width, height])
    .nodeWidth(15)
    .nodePadding(10)
    .nodes(energy.nodes)
    .links(energy.links)
    .layout(32);

var path = sankey.link();