How can I avoid getting a message saying an object is not defined?

Question

I have code that does this:

$scope.grid.data = null;

However it could be the case that $scope.grid has not yet been defined. If that's the case then how could I avoid trying to do this assignment?

Answer 1

if($scope.grid){
  $scope.grid.data = null;
}

Can find more elaborate response here: JavaScript object detection: dot syntax versus 'in' keyword