Link fix distanceFunction global var leak

examples/js/src/example-papaparsing/linkForce.js

@@ -12,8 +12,8 @@ function startLinkSimulation() {
 
   if (tweakedVerOfLink) {
     force = d3.forceLinkFullyConnected()
-              .distance(function (n) {
-                return distanceFunction(n.source, n.target, props, norm);
+              .distance(function (n, m) {
+                return distanceFunction(n, m, props, norm);
               });
   }
   else {

src/link.js

@@ -47,7 +47,7 @@ export default function() {
     if (!nodes) return;
     for (let i = 1, n = nodes.length; i < n; i++) {
       for (let j = 0; j < i; j++) {
-        distances.push(distanceFunction(nodes[i], nodes[j], props, norm));
+        distances.push(distance(nodes[i], nodes[j]));
       }
     }
   }