how do you set a fixed link distance with d3 v4

Question

All the API examples seem to be for v3 still. I\'m trying to understand how to create a force graph with links of a fixed distance, like: http://bl.ocks.org/d3noob/5141278

Answer 1

you may try without force('center')

let simulation = d3.forceSimulation()
  .force("link", d3.forceLink().id(function(d) { return d.id; }))
  .force("charge", d3.forceManyBody().strength(-150));