DataTree State Object, JavaScript Programming Example of DataTree State Object

//loading from file
var tree = {
  view:"tree",
  id:"tree",
  data:tree_data,
  height:500,
  select:true
};

var buttons = {
  padding:10, rows:[
    { view:"button", width:150, value:"Save state", click:save_state },
    { view:"button", width:150, value:"Restore state", click:restore_state }
  ]
};

webix.ready(function(){
  webix.ui({
     rows:[
      {
        cols:[
          tree,
          buttons
      	]
      }
    ]
  });
});

function save_state(){
  webix.storage.local.put("state", $$("tree").getState());
};

function restore_state(){
  var state = webix.storage.local.get("state");
  if (state)
    $$("tree").setState(state);
};