template/html/d3-graph.js
function onNodeMouseOverOut(nodes, links, enter, targetNode)
   {
      // If there is an existing selected node then exit early.
      if (isNodeSelected()) { return; }

      // Select / highlight related nodes or remove attributes based on enter state.
      fadeRelatedNodes(targetNode, enter, nodes, links);
   }
function onNodeMouseOverOut(nodes, links, enter, targetNode)
   {
      // If there is an existing selected node then exit early.
      if (isNodeSelected()) { return; }

      // Select / highlight related nodes or remove attributes based on enter state.
      fadeRelatedNodes(targetNode, enter, nodes, links);
   }
Handles fading related nodes to the given `targetNode` if there is no currently selected node.

@param {Array}    nodes - All graph nodes.
@param {Array}    links - All graph links.
@param {boolean}  enter - true when mouse entering / false when mouse exiting.
@param {object}   targetNode - The target node.