I have a vis.js network graph that contains multiple edges between nodes and I am trying to have it setup with a hierarchical layout as well. If I do a normal graph without the hierarchical layout options then multiple lines are shown between nodes, however, once I turn on/place in the hierarchical layout option only one line is drawn.
Below are two plunkers showing what I mean:
https://plnkr.co/edit/c8SuBc0XjDZnn6im2vdg (Plunker with hierarchical layout off)
var options = {
height: '400px',
edges: …