vis.js node,edge show/hide

showhide.js

var nodes = new vis.DataSet([
  {id: 2696, label: "2696", hidden: false}, 
  {id: 1205, label: "1205", hidden: false}, 
  {id: 2697, label: "2697", hidden: false},
  {id: 2021, label: "2021", hidden: true},
  {id: 2047, label: "2047", hidden: true}
]);

var edges = new vis.DataSet([
  {id: 'e1', from: 2696, to: 2697, hidden: false}, 
  {id: 'e2', from: 2696, to: 1205, hidden: false},
  {id: 'e3', from: 1205, to: 2021, hidden: true},
  {id: 'e4', from: 1205, to: 2047, hidden: true}
]);

var container = document.getElementById('mynetwork');
var data = {
  nodes: nodes,
  edges: edges
};

var network = new vis.Network(container, data, {});

// true=hide; false=show
var toggle = false;
network.on("click", function(e) {
  tw_id = 1205;
  if (e.nodes[0] == tw_id) {
    nodes.update([
      {id: 2021, hidden: toggle},
      {id: 2047, hidden: toggle}
    ]);
    edges.update([
      {id: 'e3', hidden: toggle},
      {id: 'e4', hidden: toggle}
    ]);
    network.fit();
    // switch toggle
    toggle = !toggle;
  }
});