AngularJS directive $scope.$watch for two way binding doesn't working











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I am trying to detect changes on two way binding scope in AngularJS (1.7.2) directive.



// pagination.js (directive)
app.directive("pagination", ($rootScope) => {
return {
templateUrl: "/shared/filters/pagination/pagination.html",
scope: {
filter: "="
},
link: function($scope, element, attrs) {

$scope.$watch("filter", value => {
console.log(value); // first time works, later it's undefined
});

}
}
});

// parent.html
<pagination filter="filter"></pagination>

// parent.js
$scope.filter = {
status: "All"
};


The $scope.filter is getting changed via function, which also locate in the parent.js file:



$scope.someFunction = () => {
$scope.filter.status = "Pending";
// this should fire the $scope.$watch event in the pagination.js (directive)
// however this doesn't get applied
};


How to make the scope to be listened to changes that are coming from other directives?










share|improve this question




























    up vote
    3
    down vote

    favorite












    I am trying to detect changes on two way binding scope in AngularJS (1.7.2) directive.



    // pagination.js (directive)
    app.directive("pagination", ($rootScope) => {
    return {
    templateUrl: "/shared/filters/pagination/pagination.html",
    scope: {
    filter: "="
    },
    link: function($scope, element, attrs) {

    $scope.$watch("filter", value => {
    console.log(value); // first time works, later it's undefined
    });

    }
    }
    });

    // parent.html
    <pagination filter="filter"></pagination>

    // parent.js
    $scope.filter = {
    status: "All"
    };


    The $scope.filter is getting changed via function, which also locate in the parent.js file:



    $scope.someFunction = () => {
    $scope.filter.status = "Pending";
    // this should fire the $scope.$watch event in the pagination.js (directive)
    // however this doesn't get applied
    };


    How to make the scope to be listened to changes that are coming from other directives?










    share|improve this question


























      up vote
      3
      down vote

      favorite









      up vote
      3
      down vote

      favorite











      I am trying to detect changes on two way binding scope in AngularJS (1.7.2) directive.



      // pagination.js (directive)
      app.directive("pagination", ($rootScope) => {
      return {
      templateUrl: "/shared/filters/pagination/pagination.html",
      scope: {
      filter: "="
      },
      link: function($scope, element, attrs) {

      $scope.$watch("filter", value => {
      console.log(value); // first time works, later it's undefined
      });

      }
      }
      });

      // parent.html
      <pagination filter="filter"></pagination>

      // parent.js
      $scope.filter = {
      status: "All"
      };


      The $scope.filter is getting changed via function, which also locate in the parent.js file:



      $scope.someFunction = () => {
      $scope.filter.status = "Pending";
      // this should fire the $scope.$watch event in the pagination.js (directive)
      // however this doesn't get applied
      };


      How to make the scope to be listened to changes that are coming from other directives?










      share|improve this question















      I am trying to detect changes on two way binding scope in AngularJS (1.7.2) directive.



      // pagination.js (directive)
      app.directive("pagination", ($rootScope) => {
      return {
      templateUrl: "/shared/filters/pagination/pagination.html",
      scope: {
      filter: "="
      },
      link: function($scope, element, attrs) {

      $scope.$watch("filter", value => {
      console.log(value); // first time works, later it's undefined
      });

      }
      }
      });

      // parent.html
      <pagination filter="filter"></pagination>

      // parent.js
      $scope.filter = {
      status: "All"
      };


      The $scope.filter is getting changed via function, which also locate in the parent.js file:



      $scope.someFunction = () => {
      $scope.filter.status = "Pending";
      // this should fire the $scope.$watch event in the pagination.js (directive)
      // however this doesn't get applied
      };


      How to make the scope to be listened to changes that are coming from other directives?







      angularjs angularjs-directive angularjs-scope






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Nov 11 at 23:26









      georgeawg

      32.4k104966




      32.4k104966










      asked Nov 11 at 19:35









      Raz

      21411




      21411
























          1 Answer
          1






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          up vote
          2
          down vote



          accepted










          Use a deeper watch depth:



            $scope.$watch("filter", value => {
          console.log(value); // first time works, later it's undefined
          ̶}̶)̶;̶̶
          }, true);




          For information, see AngularJS Developer Guide - $scope Watch Depths.






          share|improve this answer























          • The link details you provided is great.
            – Raz
            Nov 12 at 10:19











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          1 Answer
          1






          active

          oldest

          votes








          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes








          up vote
          2
          down vote



          accepted










          Use a deeper watch depth:



            $scope.$watch("filter", value => {
          console.log(value); // first time works, later it's undefined
          ̶}̶)̶;̶̶
          }, true);




          For information, see AngularJS Developer Guide - $scope Watch Depths.






          share|improve this answer























          • The link details you provided is great.
            – Raz
            Nov 12 at 10:19















          up vote
          2
          down vote



          accepted










          Use a deeper watch depth:



            $scope.$watch("filter", value => {
          console.log(value); // first time works, later it's undefined
          ̶}̶)̶;̶̶
          }, true);




          For information, see AngularJS Developer Guide - $scope Watch Depths.






          share|improve this answer























          • The link details you provided is great.
            – Raz
            Nov 12 at 10:19













          up vote
          2
          down vote



          accepted







          up vote
          2
          down vote



          accepted






          Use a deeper watch depth:



            $scope.$watch("filter", value => {
          console.log(value); // first time works, later it's undefined
          ̶}̶)̶;̶̶
          }, true);




          For information, see AngularJS Developer Guide - $scope Watch Depths.






          share|improve this answer














          Use a deeper watch depth:



            $scope.$watch("filter", value => {
          console.log(value); // first time works, later it's undefined
          ̶}̶)̶;̶̶
          }, true);




          For information, see AngularJS Developer Guide - $scope Watch Depths.







          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited Nov 12 at 13:51

























          answered Nov 11 at 20:02









          georgeawg

          32.4k104966




          32.4k104966












          • The link details you provided is great.
            – Raz
            Nov 12 at 10:19


















          • The link details you provided is great.
            – Raz
            Nov 12 at 10:19
















          The link details you provided is great.
          – Raz
          Nov 12 at 10:19




          The link details you provided is great.
          – Raz
          Nov 12 at 10:19


















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