anchor.diff:      line.link {
           stroke: #000;
           stroke-width: 1.5px;
  -        fill: green;
  -        stroke-dasharray: 0,2 1;
       }
   
   </style>
  
positive.code: <style>
  
      body {
          overflow:hidden;
          margin:0;
      }
  
      .node circle {
          cursor: pointer;
  
negative.code:         return nodes;
      }
  
      function resize() {
          var w = 900, h = 500;
          svg.attr("width", w).attr("height", h);
  
          force.size([force.size()[0]+(w-width)/zoom.scale(),force.size()[1]+(h-height)/zoom.scale()]).resume();
          width = w;
          height = h;
      }
  
      function dragstart(d) {
          d3.event.sourceEvent.stopPropagation();
          d3.select(this).classed("fixed", d.fixed = true);
      }
  
  </script>
  