I am experiencing some issues with my AngularJS JavaScript code. The root scope is updating correctly, but the other two scopes are not working as expected. Can

My attempt at writing AngularJS JavaScript code seems to be malfunctioning.

While the root scope updates properly, the other two scopes FirstCtrl and SecondCtrl do not update as expected when the root scope is updated. I would like all three scopes to update synchronously, but my current implementation does not achieve this.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8>
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.4/angular.min.js"></script>
    <link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.4/angular-animate.js"></script>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
    <title>AngularJS</title>
</head>
<body>
    <div ng-app="">
        <input type="text" ng-model="data.message">
        <h1>{{data.message}}</h1>
        <div ng-controller="FirstCtrl">
            <input type="text" ng-model="data.message">
            <h1>{{ data.message}}</h1>
        </div>
            <div ng-controller="SecondCtrl">
            <input type="text" ng-model="data.message">
            <h1>{{ data.message}}</h1>
        </div>
    </div>

    <script type = "text/javascript" src="main.js"></script>
</body>
</html>

The content of main.js file:

function FirstCtrl($scope){
}
function SecondCtrl($scope){
}

Answer №1

var app = angular.module('myApp', []);
app.controller('FirstCtrl', function($scope) {
});
app.controller('SecondCtrl', function($scope) {
});
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.4/angular.min.js"></script>
<div ng-app="myApp">
  <input type="text" ng-model="message">
  <h1>{{message}}</h1>
  <div ng-controller="FirstCtrl">
      <input type="text" ng-model="message1">
      <h1>{{ message1}}</h1>
  </div>
      <div ng-controller="SecondCtrl">
      <input type="text" ng-model="message2">
      <h1>{{ message2}}</h1>
  </div>
</div>

Create controllers within the module to establish separate scopes for each controller.

Answer №2

In order to use scope properties, they must be defined within the controller of your AngularJS application. Make sure you have an app declared first and then declare your controllers within that app.

<!DOCTYPE html>
<html lang="en>
<head>
    <meta charset="UTF-8>
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.4/angular.min.js"></script>
    <link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.4/angular-animate.js"></script>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
    <title>AngularJS</title>
</head>
<body>
    <div ng-app="myApp">
        <input type="text" ng-model="data.message">
        <h1>{{data.message}}</h1>
        <div ng-controller="FirstCtrl">
            <input type="text" ng-model="data.message">
            <h1>{{ data.message}}</h1>
        </div>
            <div ng-controller="SecondCtrl">
            <input type="text" ng-model="data.message">
            <h1>{{ data.message}}</h1>
        </div>
    </div>

    <script type = "text/javascript" src="main.js"></script>
</body>
</html>

main.js :

    var app=angular.module("myApp",[]);
    app.controller("FirstCtrl",function($scope){
   });
 app.controller("SecondCtrl",function($scope){
   });

Answer №3

Here is a suggested approach:

angular.module('myApp'[])
  .controller('FirstCtrl',FirstCtrl)
  .controller('SecondCtrl',SecondCtrl);

function FirstCtrl($scope){
}
function SecondCtrl($scope){
}

In your index.html file, Include main.js and specify the application name

<body ng-app="myApp">

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