AngularJS Multiple ng-app within a page

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>

标签： angularjs

13条回答

听够珍惜

2楼-- · 2018-12-31 04:59

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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不流泪的眼

3楼-- · 2018-12-31 05:02

// 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']);

<!-- angularjs@1.7.0 -->
<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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姐姐魅力值爆表

4楼-- · 2018-12-31 05:03

<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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后来的你喜欢了谁

5楼-- · 2018-12-31 05:05

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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梦醉为红颜

6楼-- · 2018-12-31 05:05

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

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

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

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皆成旧梦

7楼-- · 2018-12-31 05:07

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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