AngularJS页面内的多个ng-app

时间：2013-09-02 10:43:27

标签： angularjs

我刚开始学习Angular JS并创建了一些基本样本，但我遇到了以下问题。

我创建了2个模块和2个控制器。

shoppingCart -> ShoppingCartController
namesList -> NamesController

每个控制器都有相关的视图。第一个视图呈现正常，但第二个不呈现。没有错误。

http://jsfiddle.net/ep2sQ/

请帮我解决这个问题。

还有可能在View中添加控制台以检查从Controller传递的值。

e.g。在下面的div中我们可以添加console.log并输出控制器值

<div ng-app="shoppingCart" ng-controller="ShoppingCartController">
</div>

12 个答案:

答案 0 :(得分：187)

所以基本上如切尔尼夫所提到的，我们需要引导模块在同一页面中拥有多个ng-app。非常感谢所有的投入。

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>

答案 1 :(得分：118)

要在HTML文档中运行多个应用程序，您必须使用angular.bootstrap()

手动引导它们

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']);

原因是每个HTML文档只能自动引导一个AngularJS应用程序。在文档中找到的第一个ng-app将用于定义作为应用程序自动引导的根元素。

换句话说，虽然技术上每页可以有多个应用程序，但只有一个ng-app指令会被Angular框架自动实例化和初始化。

答案 2 :(得分：41)

您可以直接使用angular.bootstrap() ... 问题是您失去了指令的好处。

首先，您需要获取对HTML元素的引用才能进行引导，这意味着您的代码现在已经与您的HTML相关联。

其次，两者之间的联系并不明显。使用ngApp，您可以清楚地看到哪些HTML与哪个模块相关联，并且您知道在哪里查找该信息。但是可以从代码中的任何位置调用angular.bootstrap()。

如果你打算尽力做到最好的话就是使用指令。这就是我做的。它被称为ngModule。以下是您的代码使用它的样子：

<!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>

您可以在以下网址获取源代码：

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

它的实现方式与ngApp相同。它只是在幕后调用angular.bootstrap()。

答案 3 :(得分：9)

在我的情况下，我必须将我的第二个应用程序的引导包裹在angular.element(document).ready中以使其工作：

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

答案 4 :(得分：7)

以下是一个html页面中的两个应用程序和一个应用程序中的两个控制器的示例：

          

    <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>

答案 5 :(得分：6)

您可以在一个rootModule中合并多个模块，并将该模块指定为 ng-app为优势元素ex：body tag。

代码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>

答案 6 :(得分：3)

＆＃13;
＆＃13; 
         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']);
         });
＆＃13; 
<!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>
＆＃13;
＆＃13;
＆＃13;

答案 7 :(得分：1)

您可以定义Root ng-App，在此ng-App中，您可以定义多个nd-Controler。像这样 

    <!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>

答案 8 :(得分：1)

// 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>

答案 9 :(得分：0)

  

我已经修改了你的jsfiddle，可以将最顶层的模块作为其余模块的rootModule。   在您的jsfiddle上更新了以下修改。

  1. 第二个模块可以注入RootModule。
  2. 在第二个定义的ng-app中放置在Root ng-app中。

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

答案 10 :(得分：0)

使用angular.bootstrap(element, [modules], [config])手动启动AngularJS应用程序（有关详细信息，请参阅Bootstrap guide）。

请参阅以下示例：

// 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']);
<!-- 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="app1">
    <div ng-controller="main">
      {{msg}}
    </div>
  </div>

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

</div>

答案 11 :(得分：-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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