JAVASCRIPT

Prevent the wiping of an Array after routing Angular.js

ou can try something similar

// Untested code

app.factory("chartService", function() {
    var chartData;

    function saveData(data) {
      chartData = data;          
    }

    function getData() {
      return chartData;
    }

    return {
      saveData: saveData,
      getData: getData
    };
});

app.controller("chartCtrl", function($rootScope, $scope, $interval, chartService) {
    var data = chartService.getData();       
    if (data) {
      // Navigating back
      $scope.data = data;
    } else {
       // First visit of the session
       $scope.data = [[],[],[]];
    }
    
     // interval code ...

    $scope.$on('$destroy', function() {
          chartService.saveData($scope.data);
          $interval.cancel(stopChart);
    });
});