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JavaScript

Travis Thompson
Travis Thompson
12,976 Points
Posted by Travis Thompson
Travis Thompson
12,976 Points

Within your link function's body, set up a conditional to test whether ngModelCtrl - STUMPED

Not sure why this is not passing. The conditional seems to be setup correctly.

Question is: Within your link function's body, set up a conditional to test whether ngModelCtrl (which you should have set up as the 4th parameter) is defined. If it isn't, the function should return immediately. If it is defined, call console.log('my model', ngModelCtrl).

My Code: 

angular.module('treehouseCourse', [])
  .directive('sometimesTwoWay', function() {
    return {
      // YOUR CODE HERE
      require: '?ngModel',
      link: function($scope, $element, $attrs, ngModelCtrl) {
        if (ngModelCtrl === undefined) {
          return;
        } else {
          console.log('my model', ngModelCtrl);
        }
      }
    }
  });

1 Answer

Chris Shaw
Chris Shaw
26,676 Points
Chris Shaw
Chris Shaw
26,676 Points

Hi Travis,

Your code won't work because undefined refers to variables that that psychically doesn't exist which isn't the case here since ngModelCtrl is defined as a parameter, instead all you need to do is use the bang ! operator to check if the value is anything other than true.

Also I prefer not to have else statements where a return statement exists as it's redundant since a return in-between execution is already explicit.

angular.module('treehouseCourse', [])
  .directive('sometimesTwoWay', function() {
    return {
      // YOUR CODE HERE
      require: '?ngModel',
      link: function($scope, $element, $attrs, ngModelCtrl) {
        if (!ngModelCtrl) {
          return;
        }

        console.log('my model', ngModelCtrl);
      }
    }
  });

Happy coding!