Data Binding in AngularJS appears to be non-functional

Experimenting with AngularJS, I created a small code snippet that doesn't seem to bind data properly. Here is the HTML and JS code for those who prefer not to visit the provided link:

first.html

<!doctype html>
<html ng-app="firstApp">
<head>
    <title>First Angular JS</title>
    <script src="/lib/angular.min.js"></script>
    <script src="/js/first.js"></script>
</head>
<body>
    <div ng-controller="FirstController">
        <span>Name:</span>
        <input type="text" ng-model="first">    
        <input type="text" ng-model="last">
        <button ng-click='updateMessage()'>Message</button>
        <hr>{{heading + message}}
    </div>

</body>
</html>

first.js

var firstApp = angular.module('firstApp',[]);
firstApp.controller = ('FirstController',function($scope)
{
  $scope.first = "Some";
  $scope.last = "one";
  $scope.heading = "Message: ";
  $scope.updateMessage = function()
    {
      $scope.message = 'Hello' + $scope.first + ' ' + $scope.last + '!';
    };
  });

The HTML file uses express to redirect calls as needed.

node_server.js

var express = require('express');
var app = express();
app.use('/', express.static('./static')).
    use('/images',express.static('./images')).
    use('/lib',express.static('./lib/angular-1.2.22'));
app.listen(8080);

The output currently displays {{message + heading}}. Any suggestions on how to fix this issue?

Answer №1

The problem lies in the manner in which you are defining your controller.

Instead of:

firstApp.controller = ('FirstController',function($scope) ...

You should have:

firstApp.controller('FirstController', function($scope) ...

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