controller.js

angular.module('plunker', [])

  .controller('MainCtrl', function($scope) {
    $scope.myModel = {};
    $scope.myModel.to = "init-";
    
    //AT THE END OF EXECUTION
    //What i expect to have is something like
    $scope.myModel.to = "init-something-to-slug";
    $scope.myModel.from = "Something to slug";
    
  });

view.html

  <slug from="myModel.from" to="myModel.to"></slug>
  <p ng-model="myModel.to">{{myModel.to}}</p>
  <input type="text" ng-model="myModel.from">