enhancing feature to enable automatic selection of chosen option

Question

enhancing feature to enable automatic selection of chosen option

I am facing an issue with a dropdown that utilizes ng-options in Angular. There is a default option selected with an empty value, indicated by the "selected" attribute and matching the model's value.

Whenever I add a new element to the ng-options list, even if it does not have an empty value, it automatically becomes selected if the model still has an empty value (which points to the default empty option). The model's value remains empty, but the dropdown displays the newly added option as selected. I even tried setting the default option value to " " instead of just "", but the behavior stays the same.

Is there a way to prevent newly added options from being automatically selected?

<select class="form-control section" ng-model="action.prop">
            <option value="" disabled selected>Select Property</option>
            <option ng-repeat="prop in tr.props| orderBy:prop.name"
            value="{{prop.name}}"> {{prop.name}} </option>
</select>

javascript angularjs

Answer 1

Answer №1

Give this code a try:

<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.4/angular.min.js"></script>

<body>

    <div ng-app="myApp" ng-controller="myCtrl">

        <select ng-model="selectedName" ng-options="x for x in names">

        </select>

        <p>{{selectedName}}</p>

        <button ng-click="add()">Add</button>

    </div>

    <script>
        var app = angular.module('myApp', []);
        app.controller('myCtrl', function($scope) {
            $scope.names = [""];
            $scope.selectedName = $scope.names[0]
            $scope.add = function() {
                $scope.names.push("new");
            }

        });
    </script>


</body>

</html>

Answer 2

Give this code a try:

<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.4/angular.min.js"></script>

<body>

    <div ng-app="myApp" ng-controller="myCtrl">

        <select ng-model="selectedName" ng-options="x for x in names">

        </select>

        <p>{{selectedName}}</p>

        <button ng-click="add()">Add</button>

    </div>

    <script>
        var app = angular.module('myApp', []);
        app.controller('myCtrl', function($scope) {
            $scope.names = [""];
            $scope.selectedName = $scope.names[0]
            $scope.add = function() {
                $scope.names.push("new");
            }

        });
    </script>


</body>

</html>

Answer 3

Answer №2

Before initiating your dropdown function, ensure to assign a default value to your ng-model in the controller as shown below. This will make sure that it is always set to a predefined value.

Controller

$scope.selectOption = {};
$scope.selectOption.value = '';

Answer 4

Before initiating your dropdown function, ensure to assign a default value to your ng-model in the controller as shown below. This will make sure that it is always set to a predefined value.

Controller

$scope.selectOption = {};
$scope.selectOption.value = '';

Answer 5

Answer №3

While both Roth's and Nishant's solutions seemed viable for my issue, I ultimately decided to go with a different approach. Instead of using ng-options and a filter, I opted for an ng-repeat with a condition "ng-if="prop.name != ''". This was necessary because I noticed that there was a brief moment where the latest property with an empty name would show up in the ng-repeat loop, causing issues with setting it as selected due to ng-model being empty.

<select class="form-control section" ng-model="action.prop">
        <option value="" disabled selected>Select Property</option>
        <option ng-if="prop.name != ''" ng-repeat="prop in tr.props| orderBy:prop.name"
        value="{{prop.name}}"> {{prop.name}} </option>
</select>

Answer 6

While both Roth's and Nishant's solutions seemed viable for my issue, I ultimately decided to go with a different approach. Instead of using ng-options and a filter, I opted for an ng-repeat with a condition "ng-if="prop.name != ''". This was necessary because I noticed that there was a brief moment where the latest property with an empty name would show up in the ng-repeat loop, causing issues with setting it as selected due to ng-model being empty.

<select class="form-control section" ng-model="action.prop">
        <option value="" disabled selected>Select Property</option>
        <option ng-if="prop.name != ''" ng-repeat="prop in tr.props| orderBy:prop.name"
        value="{{prop.name}}"> {{prop.name}} </option>
</select>

enhancing feature to enable automatic selection of chosen option

Answer №1

Answer №2

Answer №3

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