Collecting User Input Within an NgRepeat Directive Using AngularJS

Question

Collecting User Input Within an NgRepeat Directive Using AngularJS

I am working on an AngularJS application with an ngRepeat directive. Within this directive, there is a textbox that allows users to input numeric values. I want to capture this user input and perform actions based on it whenever the textbox changes. How can I successfully pass the user input into the ngChange event?

<table>
  <tr ng-repeat="d in vm.data">
    <td><input type="number" value="{{ d }}" ng-change="vm.onChange(userInput)" /></td> <!-- How can I access the user input within this element? -->
  </tr>
</table>


(function () {
  var app = angular.module('TestApp', []);
  app.controller('TestCtrl', [function () {
    var vm = this;
    vm.data = [1, 2, 3];

    vm.onChange = function (inputValue) {
      // handle the change event here...
    };

  }]);
})();

javascript angularjs angularjs-directive angularjs-ng-repeat

Answer 1

Answer №1

Insights

Make sure to include the model in the $scope like this: $scope.data = [1, 2, 3];.
The ng-change directive should be used with the ng-model directive on each input element, for example:
```
<input ng-model='d' ng-change='onChange(d)' type="number" value="{{ d }}">
```

Take a look at this code snippet:

var app = angular.module('TestApp', []);
app.controller('TestCtrl', ['$scope', function($scope) {
  $scope.data = [1, 2, 3];

  $scope.onChange = function(inputValue) {
    console.log(inputValue);
  };
}]);

<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.8/angular.min.js"></script>

<div ng-app='TestApp'>
  <table ng-controller="TestCtrl">
    <tr ng-repeat="d in data">
      <td>
        <input ng-model='d' ng-change='onChange(d)' type="number" value="{{ d }}">
      </td>
      <!-- How can I get the user input here? -->
    </tr>
  </table>
</div>

By following this structure, the onChange function will be triggered whenever there is a change in the input field.

Answer 2

Insights

Make sure to include the model in the $scope like this: $scope.data = [1, 2, 3];.
The ng-change directive should be used with the ng-model directive on each input element, for example:
```
<input ng-model='d' ng-change='onChange(d)' type="number" value="{{ d }}">
```

Take a look at this code snippet:

var app = angular.module('TestApp', []);
app.controller('TestCtrl', ['$scope', function($scope) {
  $scope.data = [1, 2, 3];

  $scope.onChange = function(inputValue) {
    console.log(inputValue);
  };
}]);

<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.8/angular.min.js"></script>

<div ng-app='TestApp'>
  <table ng-controller="TestCtrl">
    <tr ng-repeat="d in data">
      <td>
        <input ng-model='d' ng-change='onChange(d)' type="number" value="{{ d }}">
      </td>
      <!-- How can I get the user input here? -->
    </tr>
  </table>
</div>

By following this structure, the onChange function will be triggered whenever there is a change in the input field.

Answer 3

Answer №2

First and foremost, make sure to add the missing ">" in your input syntax.
Additionally, don't forget to include ng-model on your input element.

Here's the code snippet:

<tr ng-repeat="d in vm.data">
    <td><input type="number" ng-change="vm.onChange(d.val)" ng-model="d.val"></td> 
</tr>

var vm = this;
    vm.data = [{val:1}, {val:2}, {val:3}];

    vm.onChange = function (val) {
      console.log(val);
    };

Answer 4

First and foremost, make sure to add the missing ">" in your input syntax.
Additionally, don't forget to include ng-model on your input element.

Here's the code snippet:

<tr ng-repeat="d in vm.data">
    <td><input type="number" ng-change="vm.onChange(d.val)" ng-model="d.val"></td> 
</tr>

var vm = this;
    vm.data = [{val:1}, {val:2}, {val:3}];

    vm.onChange = function (val) {
      console.log(val);
    };

Answer 5

Answer №3

To properly link the value to a component in the VM, you can follow this example:

(function () {
  var app = angular.module('TestApp', []);
  app.controller('TestCtrl', [function () {
    var vm = this;
    vm.data = [1, 2, 3];
    vm.nums = [];

    vm.onChange = function (i) {
      console.log(nums[i]);
    };
  }]);
})();

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<table ng-cotroller="TestCtrl">
  <tr ng-repeat="d in vm.data">
    <td>
      <input type="number" ng-model="vm.nums[$index]"
             ng-change="vm.onChange($index)">
    </td>
  </tr>
</table>

Answer 6

To properly link the value to a component in the VM, you can follow this example:

(function () {
  var app = angular.module('TestApp', []);
  app.controller('TestCtrl', [function () {
    var vm = this;
    vm.data = [1, 2, 3];
    vm.nums = [];

    vm.onChange = function (i) {
      console.log(nums[i]);
    };
  }]);
})();

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<table ng-cotroller="TestCtrl">
  <tr ng-repeat="d in vm.data">
    <td>
      <input type="number" ng-model="vm.nums[$index]"
             ng-change="vm.onChange($index)">
    </td>
  </tr>
</table>

Collecting User Input Within an NgRepeat Directive Using AngularJS

Answer №1

Insights

Answer №2

Answer №3

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