I have a setInterval function that runs every 5 seconds. I want the code inside that function to only run if the window is infocus. I've tried but it doesnt seem to work.

```
$scope.myFunction = function() {
  var isonfocus = true;  

  window.onblur = function() {  
    isonfocus = false;  
  }  

  window.onfocus = function() {  
    isonfocus = true;  
  }

  if (isonfocus) {   
    console.log("focused!");
  }
}

setInterval(function() {
  $scope.myFunction();
}, 5000);

```