Angular - the utilization of expressions in view templates

Exploring Angular for the first time and attempting to create a Single Page Application (SPA). I have included the route module, which seems to be functioning properly. However, the templates are not interpreting Angular expressions as expected - for example, when including " {{ 1 + 2 }}", it simply displays the same expression instead of evaluating to "3."

Is there an additional step required to make the templates process expressions correctly?

Here is my code:

<!HTML>
<head>
    <script src="angular.min.js"></script>
    <script src="angular.route.js"></script>
</head>
<body ng-app="Prueba">
    <div class="Contenido" ng-view></div>
</body>
<script>
    angular.module('Prueba', ['ngRoute'])
    .config(function($routeProvider){
    $routeProvider.when('/', {
        templateUrl: 'vista2.html',
        controller: 'prCtrl'        
    })
});
</script>
</HTML>

vista2.html

<div>{{ 1+2 }}</div>

Answer №1

Your syntax is correct. Make sure to define prCtrl as a controller and everything should work smoothly. Examples of valid expressions in Angular include:

  • 1+2
  • a+b
  • user.name
  • items[index]

These expressions can be used within {{ }} brackets. The issue you're facing is likely due to not having the proper controller defined, causing the expressions to not be parsed correctly.

Learn more about expressions here.

Answer №2

To successfully implement the functionality, you will need to establish a 'prCtrl' controller within your code. To achieve this, simply append the following line at the conclusion of your script:

angular.module('Testing').controller('prCtrl', function($scope){});

Once this is done, your program should run smoothly.

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