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Angularjs - $watch issue


Angularjs - $watch issue

By : Venkataseshan
Date : November 19 2020, 01:01 AM
wish of those help Instead of returning it in anonymous function, apply $watch directly on scope objects-
code :
$scope.$watch('userFormData.cpr',
            function (cprValue) {

                console.log(cprValue);

                //For at scriptet ikke skal faile første gang det bliver loadet
                //tjekker vi om medlemmet har skrevet noget i cpr feltet
                if (cprValue === undefined) {
                    return false;
                }

                //Hent brugerens input og split dem op
                var cpr = cprValue.toString();

                //Hvis cpr undeholder en streg -

                var dd = +cpr.substr(0, 2); // 01
                var mm = +cpr.substr(2, 2); // 02
                var yy = +cpr.substr(4, 2); // 90

                //Calculate if 90 is > 50
                if (yy > 50) {
                    var year = yy + 1900;
                } else {
                    var year = yy + 2000;
                }

                //Sæt fødselsdags datoen sammen så momentJS forstår det
                var final = mm + "/" + dd + "/" + year;

                //Beregn datoen og split resultatet op så vi kun får fødselsdags tallet
                var alder = moment(final, "MM/DD/YYYY").fromNow().split(" ")[0];

                //Vi clear ageToYoung feltet hvis det har været udfyldt
                //og disabler andenBetaler vinduet igen
                $scope.ageToYoung = "";
                $scope.hideSecondpayer = true;


                //Hvis personen er mellem 15 og 18 år så vis andenBetaler boksen
                if ((alder >= 15) && (alder <= 18)) {
                    $scope.hideSecondpayer  = false;
                    $scope.hideRegnrBarn    = true;
                    $scope.hideKontonrBarn  = true;

                } else if (alder <= 14) {

                    //Personen er ikke gammel nok, og vi skriver det derfor til kunden
                    $scope.ageToYoung = "Du skal minimum være 15 år gammel";
                }

            });


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AngularJS : $watch not triggered on change ($scope issue with include page)

AngularJS : $watch not triggered on change ($scope issue with include page)


By : Walter Gibilaro
Date : March 29 2020, 07:55 AM
This might help you In this plunker, I reworked the code to allow the user to select either "Rear" or "Front", and the select list will dynamically update. The selected value is available as $scope.selected.item on the MainCtrl scope. (There was a lot of unnecessary code in the directive that I removed. onChange handlers aren't needed when ng-model is being used.)
code :
<name-value-select selected-item="selected.item" options="filterTypes">
</name-value-select>

app.directive('nameValueSelect', function () {
    return {
        restrict: "E",
        scope: {
            selectedItem: "=",
            options: '='
        },
        template: ...
<name-value-select selected-item="selected.item" choice="choice.type"
 options="myTypes"></name-value-select>

app.directive('nameValueSelect', function () {
    return {
        restrict: "E",
        scope: {
            selectedItem: "=",
            choice:  "=",
            options: "=",
        },
        controller: function($scope)  {
          $scope.$watch('choice', function (selectedType) {
            $scope.selectedItem = '';  // clear selection
            $scope.filterTypes = [];
            angular.forEach($scope.options, function (type) {
              if (type.Type === selectedType) {
                this.push(type);
               }
            }, $scope.filterTypes);
            $scope.filterTypes.sort(function (a, b) {
              return a.Description.localeCompare(b.Description);
            });
          });
        },
        template: '<select ng-model="selectedItem" ' +
         'ng-options="o.Description for o in filterTypes">' +
         '<option value="" selected="selected">Please Select</option>' +
         '</select>'
    };
});
AngularJs $watch issue

AngularJs $watch issue


By : user3009595
Date : March 29 2020, 07:55 AM
hope this fix your issue That's because $watch is just watching the reference of scope.data.nodes, so no matter what you push or pop, the reference will not change.
Instead of using $watch, you can use $watchCollection. It will detect the length of the array.
code :
scope.$watchCollection('data.nodes', function(){
    return scope.render(scope.data, scope.query);
});
AngularJS - $watch <ul> children length issue

AngularJS - $watch <ul> children length issue


By : user3087231
Date : March 29 2020, 07:55 AM
it should still fix some issue I've the following html list : , I finally found, adding this to controller:
code :
$scope.$watch('searchValue', function(){
    $timeout(function(){
        $scope.$apply();
}),1});
AngularJS - Using a comma or other special character in expression to watch with $scope.$watch

AngularJS - Using a comma or other special character in expression to watch with $scope.$watch


By : Diego Félix
Date : March 29 2020, 07:55 AM
Any of those help Since attrs.authIf is invalid expression you may wrap it in a function
code :
scope.$watch(function() { return attrs.authIf; }, checkAuth);
<!DOCTYPE html>
<html ng-app="app">

  <head>
    <script data-require="angular.js@1.4.7" data-semver="1.4.7" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.7/angular.js"></script>

    <script>
      angular
        .module('app', [])
        .controller('appCtrl', function($scope) {
          $scope.dir = 'initial value';
        })
        .directive('dir', function() {
          return {
            restrict: 'A',
            scope: true,
            link: function(scope, element, attrs) {
              scope.$watch(function() {
                return attrs.dir;
              }, function(newValue) {
                scope.custom = 'custom ' + newValue;
              });
            }
          };
        });
    </script>
  </head>

  <body ng-controller="appCtrl">
    <h1>Hello Plunker!</h1>

    <div dir="id=12345;CREATE,READ,UPDATE">
      {{ custom }}
    </div>

    <hr>

    <div dir="{{ dir }}">
      {{ custom }}
    </div>

    <input type="text" ng-model="dir">
  </body>
</html>
Angularjs UI validate watch issue

Angularjs UI validate watch issue


By : Jenandra
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further here i have two input field like password and confirmPassword. Now we want to do some validate like password match in both fields or not. here is the html and js code snipet.
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