185

I have just started learning Angular JS and created some basic samples however I am stuck with the following problem.

I have created 2 modules and 2 controllers.

shoppingCart -> ShoppingCartController
namesList -> NamesController

There are associated views for each controller. The first View renders fine but second is not rendering. There are no errors.

http://jsfiddle.net/ep2sQ/

Please help me solve this issue.

Also is there any possibility to add console in View to check what values are passed from Controller.

e.g. in the following div can we add console.log and output the controller values

<div ng-app="shoppingCart" ng-controller="ShoppingCartController">
</div>
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5
  • 10
    may be this will help: stackoverflow.com/questions/12860595/… Commented Sep 2, 2013 at 10:48
  • Thank you Cherniv. This is very helpful and I solved the problem using the link you provided. Please could you also provide info on how to use console.log to dump Controller within View/Template {{console.log}} is not working. Commented Sep 2, 2013 at 12:04
  • you welcome. note that you already doing "console" in a views , this: {{item.product_name}} actually "prints" a value from your model Commented Sep 2, 2013 at 12:08
  • 1
    Is there anything wrong with creating multiple apps for a webapp? I have this project where each html page has it's own app, I want to know if performance will be impacted in anyway? Commented Sep 18, 2014 at 15:28
  • While it's possible to bootstrap more than one AngularJS application per page, we don't actively test against this scenario. It's possible that you'll run into problems, especially with complex apps, so caution is advised. See AngularJS Developer Guide - Bootstrap. Commented Mar 17, 2017 at 19:59

13 Answers 13

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194

So basically as mentioned by Cherniv we need to bootstrap the modules to have multiple ng-app within the same page. Many thanks for all the inputs.

var shoppingCartModule = angular.module("shoppingCart", [])
shoppingCartModule.controller("ShoppingCartController",
  function($scope) {
    $scope.items = [{
      product_name: "Product 1",
      price: 50
    }, {
      product_name: "Product 2",
      price: 20
    }, {
      product_name: "Product 3",
      price: 180
    }];
    $scope.remove = function(index) {
      $scope.items.splice(index, 1);
    }
  }
);
var namesModule = angular.module("namesList", [])
namesModule.controller("NamesController",
  function($scope) {
    $scope.names = [{
      username: "Nitin"
    }, {
      username: "Mukesh"
    }];
  }
);
angular.bootstrap(document.getElementById("App2"), ['namesList']);
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.3/angular.min.js"></script>

<div id="App1" ng-app="shoppingCart" ng-controller="ShoppingCartController">
  <h1>Your order</h1>
  <div ng-repeat="item in items">
    <span>{{item.product_name}}</span>
    <span>{{item.price | currency}}</span>
    <button ng-click="remove($index);">Remove</button>
  </div>
</div>

<div id="App2" ng-app="namesList" ng-controller="NamesController">
  <h1>List of Names</h1>
  <div ng-repeat="_name in names">
    <p>{{_name.username}}</p>
  </div>
</div>

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6 Comments

You can create a directive to do this instead stackoverflow.com/a/22898036/984780
The angular documentation says that when manually bootstrapping an app, NOT to use the ngApp directive. So ng-app="namesList" (could/should) be reoved. docs.angularjs.org/guide/bootstrap
For those who have ng-app's in a two seperate js files the below code might help angular.element(document).ready(function() { angular.bootstrap(document.getElementById("App2"), ['namesList']); });
Note : in my app, i had to put this line "angular.bootstrap(document.getElementById("App2"), ['namesList']);" in $(document).ready function
It is not working for me.Only the first ng-app works correctly
|
121

To run multiple applications in an HTML document you must manually bootstrap them using angular.bootstrap()

HTML

<!-- Automatic Initialization -->
<div ng-app="myFirstModule">
    ...
</div>
<!-- Need To Manually Bootstrap All Other Modules -->
<div id="module2">
    ...
</div>

JS

angular.
  bootstrap(document.getElementById("module2"), ['mySecondModule']);

The reason for this is that only one AngularJS application can be automatically bootstrapped per HTML document. The first ng-app found in the document will be used to define the root element to auto-bootstrap as an application.

In other words, while it is technically possible to have several applications per page, only one ng-app directive will be automatically instantiated and initialized by the Angular framework.

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4 Comments

Only one ngApp directive can be auto-bootloaded per HTML Document but you can have multiple apps as long as you manually bootstrap the subsequent ones.
@CodeHater where is namesList module located then? Could you please update your answer, so that it would be clearer?
This is wrong. You CAN have multiple ng-app. See stackoverflow.com/a/24867989/753632
@AndroidDev, I don't follow. The link you reference does not show multiple ng-app attributes.
42

You can use angular.bootstrap() directly... the problem is you lose the benefits of directives.

First you need to get a reference to the HTML element in order to bootstrap it, which means your code is now coupled to your HTML.

Secondly the association between the two is not as apparent. With ngApp you can clearly see what HTML is associated with what module and you know where to look for that information. But angular.bootstrap() could be invoked from anywhere in your code.

If you are going to do it at all the best way would be by using a directive. Which is what I did. It's called ngModule. Here is what your code would look like using it:

<!DOCTYPE html>
<html>
    <head>
        <script src="angular.js"></script>
        <script src="angular.ng-modules.js"></script>
        <script>
          var moduleA = angular.module("MyModuleA", []);
          moduleA.controller("MyControllerA", function($scope) {
              $scope.name = "Bob A";
          });

          var moduleB = angular.module("MyModuleB", []);
          moduleB.controller("MyControllerB", function($scope) {
              $scope.name = "Steve B";
          });
        </script>
    </head>
    <body>
        <div ng-modules="MyModuleA, MyModuleB">
            <h1>Module A, B</h1>
            <div ng-controller="MyControllerA">
                {{name}}
            </div>
            <div ng-controller="MyControllerB">
                {{name}}
            </div>
        </div>

        <div ng-module="MyModuleB">
            <h1>Just Module B</h1>
            <div ng-controller="MyControllerB">
                {{name}}
            </div>
        </div>
    </body>
</html>

You can get the source code for it at:

http://www.simplygoodcode.com/2014/04/angularjs-getting-around-ngapp-limitations-with-ngmodule/

It's implemented in the same way as ngApp. It simply calls angular.bootstrap() behind the scenes.

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Comments

9

In my case I had to wrap the bootstrapping of my second app in angular.element(document).ready for it to work:

angular.element(document).ready(function() {
  angular.bootstrap(document.getElementById("app2"), ["app2"]);
});
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1 Comment

V1.6 Deprecated: Use angular.element(callback) instead of angular.element(document).ready(callback)). See AngularJS angular.element API Reference. Also github.com/angular/angular.js/commit/…
7

Here's an example of two applications in one html page and two conrollers in one application :

    <div ng-app = "myapp">
      <div  ng-controller = "C1" id="D1">
         <h2>controller 1 in app 1 <span id="titre">{{s1.title}}</span> !</h2>
      </div>

      <div  ng-controller = "C2" id="D2">
         <h2>controller 2 in app 1 <span id="titre">{{s2.valeur}}</span> !</h2>
      </div>
    </div>
    <script>
        var A1 = angular.module("myapp", [])

        A1.controller("C1", function($scope) {
            $scope.s1 = {};
            $scope.s1.title = "Titre 1";
         });

        A1.controller("C2", function($scope) {
            $scope.s2 = {};
            $scope.s2.valeur = "Valeur 2";
         });
    </script>

    <div ng-app="toapp" ng-controller="C1" id="App2">
        <br>controller 1 in app 2
        <br>First Name: <input type = "text" ng-model = "student.firstName">
        <br>Last Name : <input type="text" ng-model="student.lastName">
        <br>Hello : {{student.fullName()}}
        <br>
    </div>

    <script>
        var A2 = angular.module("toapp", []);
        A2.controller("C1", function($scope) {
            $scope.student={
                firstName:"M",
                lastName:"E",
                fullName:function(){
                    var so=$scope.student;
                    return so.firstName+" "+so.lastName;
                }
            };
        });
        angular.bootstrap(document.getElementById("App2"), ['toapp']);
    </script>
<style>
    #titre{color:red;}
    #D1{ background-color:gray; width:50%; height:20%;}
    #D2{ background-color:yellow; width:50%; height:20%;}
    input{ font-weight: bold; }
</style>

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Comments

6

You can merge multiple modules in one rootModule , and assign that module as ng-app to a superior element ex: body tag.

code ex:

    <!DOCTYPE html>
<html>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>
<script src="namesController.js"></script>
<script src="myController.js"></script>
<script>var rootApp = angular.module('rootApp', ['myApp1','myApp2'])</script>
<body ng-app="rootApp">

<div ng-app="myApp1" ng-controller="myCtrl" >
First Name: <input type="text" ng-model="firstName"><br>
Last Name: <input type="text" ng-model="lastName"><br>
<br>
Full Name: {{firstName + " " + lastName}}
</div>

<div ng-app="myApp2" ng-controller="namesCtrl">
<ul>
  <li ng-bind="first">{{first}}
  </li>
</ul>
</div>

</body>
</html>
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1 Comment

You are nesting two different apps inside the rootApp, Angular does not allow nesting of apps
4 

         var shoppingCartModule = angular.module("shoppingCart", [])
          shoppingCartModule.controller("ShoppingCartController",
           function($scope) {
             $scope.items = [{
               product_name: "Product 1",
               price: 50
             }, {
               product_name: "Product 2",
               price: 20
             }, {
               product_name: "Product 3",
               price: 180
             }];
             $scope.remove = function(index) {
               $scope.items.splice(index, 1);
             }
           }
         );
         var namesModule = angular.module("namesList", [])
          namesModule.controller("NamesController",
           function($scope) {
             $scope.names = [{
               username: "Nitin"
             }, {
               username: "Mukesh"
             }];
           }
         );


         var namesModule = angular.module("namesList2", [])
          namesModule.controller("NamesController",
           function($scope) {
             $scope.names = [{
               username: "Nitin"
             }, {
               username: "Mukesh"
             }];
           }
         );


         angular.element(document).ready(function() {
           angular.bootstrap(document.getElementById("App2"), ['namesList']);
           angular.bootstrap(document.getElementById("App3"), ['namesList2']);
         });
<!DOCTYPE html>
<html>

<head>
  <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>

</head>

<body>

  <div id="App1" ng-app="shoppingCart" ng-controller="ShoppingCartController">
    <h1>Your order</h1>
    <div ng-repeat="item in items">
      <span>{{item.product_name}}</span>
      <span>{{item.price | currency}}</span>
      <button ng-click="remove($index);">Remove</button>
    </div>
  </div>

  <div id="App2" ng-app="namesList" ng-controller="NamesController">
    <h1>List of Names</h1>
    <div ng-repeat="_name in names">
      <p>{{_name.username}}</p>
    </div>
  </div>
  <div id="App3" ng-app="namesList2" ng-controller="NamesController">
    <h1>List of Names</h1>
    <div ng-repeat="_name in names">
      <p>{{_name.username}}</p>
    </div>
  </div>


</body>

</html>

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2 Comments

Just an extension to have multiple ng-app's in a single page I had to just combine both saeb-amini and @Nithin Mukesh code -- Thank you both
This concept is working for me. angular.element(document).ready(function() { angular.bootstrap(document.getElementById("App2"), ['namesList']); angular.bootstrap(document.getElementById("App3"), ['namesList2']); });
3 

// root-app
const rootApp = angular.module('root-app', ['app1', 'app2E']);

// app1
const app11aa = angular.module('app1', []);
app11aa.controller('main', function($scope) {
  $scope.msg = 'App 1';
});

// app2
const app2 = angular.module('app2E', []);
app2.controller('mainB', function($scope) {
  $scope.msg = 'App 2';
});

// bootstrap
angular.bootstrap(document.querySelector('#app1a'), ['app1']);
angular.bootstrap(document.querySelector('#app2b'), ['app2E']);
<!-- [email protected] -->
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.7.0/angular.min.js"></script>

<!-- root-app -->
<div ng-app="root-app">

  <!-- app1 -->
  <div id="app1a">
    <div ng-controller="main">
      {{msg}}
    </div>
  </div>

  <!-- app2 -->
  <div id="app2b">
    <div ng-controller="mainB">
      {{msg}}
    </div>
  </div>

</div>

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Comments

2

Only one app is automatically initialized. Others have to manually initialized as follows:

Syntax:

angular.bootstrap(element, [modules]);

Example:

<!DOCTYPE html>
<html>

<head>
  <script src="https://code.angularjs.org/1.5.8/angular.js" data-semver="1.5.8" data-require="[email protected]"></script>
  <script data-require="[email protected]" data-semver="0.2.18" src="//cdn.rawgit.com/angular-ui/ui-router/0.2.18/release/angular-ui-router.js"></script>
  <link rel="stylesheet" href="style.css" />
  <script>
    var parentApp = angular.module('parentApp', [])
  .controller('MainParentCtrl', function($scope) {
    $scope.name = 'universe';
  });



var childApp = angular.module('childApp', ['parentApp'])
  .controller('MainChildCtrl', function($scope) {
    $scope.name = 'world';
  });


angular.element(document).ready(function() {
  angular.bootstrap(document.getElementById('childApp'), ['childApp']);
});
    
  </script>
</head>

<body>
  <div id="childApp">
    <div ng-controller="MainParentCtrl">
      Hello {{name}} !
      <div>
        <div ng-controller="MainChildCtrl">
          Hello {{name}} !
        </div>
      </div>
    </div>
  </div>
</body>

</html>

AngularJS API

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Comments

1

You can define a Root ng-App and in this ng-App you can define multiple nd-Controler. Like this

    <!DOCTYPE html>
    <html>
    <script src = "https://ajax.googleapis.com/ajax/libs/angularjs/1.3.3/angular.min.js"></script>

<style>
         table, th , td {
            border: 1px solid grey;
            border-collapse: collapse;
            padding: 5px;
         }

         table tr:nth-child(odd) {
            background-color: #f2f2f2;
         }

         table tr:nth-child(even) {
            background-color: #ffffff;
         }
      </style>

     <script>
      var mainApp = angular.module("mainApp", []);

      mainApp.controller('studentController1', function ($scope) {
      $scope.student = {
      firstName: "MUKESH",
      lastName: "Paswan",

      fullName: function () {
         var studentObject;
         studentObject = $scope.student;
         return studentObject.firstName + " " + studentObject.lastName;
                     }
                 };
             });

             mainApp.controller('studentController2', function ($scope) {
                 $scope.student = {
                     firstName: "Mahesh",
                     lastName: "Parashar",
                     fees: 500,

                     subjects: [
                        { name: 'Physics', marks: 70 },
                        { name: 'Chemistry', marks: 80 },
                        { name: 'Math', marks: 65 },
                        { name: 'English', marks: 75 },
                        { name: 'Hindi', marks: 67 }
                     ],

                     fullName: function () {
                         var studentObject;
                         studentObject = $scope.student;
                         return studentObject.firstName + " " + studentObject.lastName;
                     }
                 };
             });
          </script>

    <body>
    <div ng-app = "mainApp">
    <div id="dv1"  ng-controller = "studentController1">
    Enter first name: <input type = "text" ng-model = "student.firstName"><br/><br/> Enter last name: <input type = "text" ng-model = "student.lastName"><br/>
    <br/>
     You are entering: {{student.fullName()}}
    </div>

    <div id="dv2" ng-controller = "studentController2">
     <table border = "0">
                <tr>
                   <td>Enter first name:</td>
                   <td><input type = "text" ng-model = "student.firstName"></td>
                </tr>

                <tr>
                   <td>Enter last name: </td>
                   <td>
                      <input type = "text" ng-model = "student.lastName">
                   </td>
                </tr>

                <tr>
                   <td>Name: </td>
                   <td>{{student.fullName()}}</td>
                </tr>

                <tr>
                   <td>Subject:</td>

                   <td>
                      <table>
                         <tr>
                            <th>Name</th>.
                            <th>Marks</th>
                         </tr>

                         <tr ng-repeat = "subject in student.subjects">
                            <td>{{ subject.name }}</td>
                            <td>{{ subject.marks }}</td>
                         </tr>

                      </table>
                   </td>

                </tr>
             </table>

          </div>
    </div>

    </body>
    </html>
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Comments

0

I have modified your jsfiddle, can make top most module as rootModule for rest of the modules. Below Modifications updated on your jsfiddle.

  1. Second Module can injected in RootModule.
  2. In Html second defined ng-app placed inside the Root ng-app.

Updated JsFiddle: http://jsfiddle.net/ep2sQ/1011/

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2 Comments

Any idea why this is only evaluating the first ng-app? jsfiddle.net/vwcbtzdg
First only automatically initialized, other have to manually initialize
0

Use angular.bootstrap(element, [modules], [config]) to manually start up AngularJS application (for more information, see the Bootstrap guide).

See the following example:

// root-app
const rootApp = angular.module('root-app', ['app1', 'app2']);

// app1
const app1 = angular.module('app1', []);
app1.controller('main', function($scope) {
  $scope.msg = 'App 1';
});

// app2
const app2 = angular.module('app2', []);
app2.controller('main', function($scope) {
  $scope.msg = 'App 2';
});

// bootstrap
angular.bootstrap(document.querySelector('#app1'), ['app1']);
angular.bootstrap(document.querySelector('#app2'), ['app2']);
<!-- [email protected] -->
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.7.0/angular.min.js"></script>

<!-- root-app -->
<div ng-app="root-app">

  <!-- app1 -->
  <div id="app1">
    <div ng-controller="main">
      {{msg}}
    </div>
  </div>

  <!-- app2 -->
  <div id="app2">
    <div ng-controller="main">
      {{msg}}
    </div>
  </div>

</div>

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Comments

-5 
<html>
<head>
    <script src="angular.min.js"></script>
</head>
<body>
<div ng-app="shoppingCartParentModule" >
     <div ng-controller="ShoppingCartController">
        <h1>Your order</h1>
        <div ng-repeat="item in items">
            <span>{{item.product_name}}</span>
            <span>{{item.price | currency}}</span>
            <button ng-click="remove($index);">Remove</button>
        </div>
    </div>

    <div ng-controller="NamesController">
        <h1>List of Names</h1>
        <div ng-repeat="name in names">
            <p>{{name.username}}</p>
        </div>
    </div>
</div>
</body>
<script>
var shoppingCartModule = angular.module("shoppingCart", [])
            shoppingCartModule.controller("ShoppingCartController",
                function($scope) {
                    $scope.items = [
                        {product_name: "Product 1", price: 50},
                        {product_name: "Product 2", price: 20},
                        {product_name: "Product 3", price: 180}
                    ];
                    $scope.remove = function(index) {
                        $scope.items.splice(index, 1);
                    }
                }
            );
            var namesModule = angular.module("namesList", [])
            namesModule.controller("NamesController",
                function($scope) {
                    $scope.names = [
                        {username: "Nitin"},
                        {username: "Mukesh"}
                    ];
                }
            );
   angular.module("shoppingCartParentModule",["shoppingCart","namesList"])
</script>
</html>
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2 Comments

Add description to your answer what you have posted
Needs comments explaining whats' going on ! Nice try!

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