Is it possible to apply multiple AngularJS controllers on the same element

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Is it possible to apply multiple AngularJS controllers on the same element ?

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6条回答

傲寒

2021-01-31 09:32

<!DOCTYPE html>
<html>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>
<body>
    <div ng-app="LukApp1">
        <div ng-controller="LukCon1">
            <textarea ng-model="text1" cols="40" rows="10"></textarea>
            <textarea ng-model="text2" cols="40" rows="10"></textarea>
        </div>
        <div ng-controller="LukCon2">
            <textarea ng-model="text3" cols="40" rows="10"></textarea>
            <textarea ng-model="text4" cols="40" rows="10"></textarea>
        </div>
    </div>
    <script>
var app = angular.module("LukApp1", []);
app.controller("LukCon1", function($scope) {
  $scope.text1 = "First Controller TEXT1";
  $scope.text2 = "First Controller TEXT2";
});
app.controller("LukCon2", function($scope) {
  $scope.text3 = "Second Controller TEXT3";
  $scope.text4 = "Second Controller TEXT4";
});
    </script>
</body>
</html>

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礼貌的吻别

2021-01-31 09:34

You could extend a controller and use it wherever you like. See the Fiddle for a better example.

<script>
var multiApp = angular.module('new', []);

multiApp.controller('aCtrl', ['$scope', '$controller', function ($scope, $controller) {
  $scope.text1 = 'Hello';

  angular.extend(this, $controller('bCtrl', {$scope: $scope}));
}]);



multiApp.controller('bCtrl', ['$scope', function ($scope) {
                $scope.text2 = 'World!';
}]);
</script>

With html like:

<body ng-app="new">
    <div id="container1" ng-controller="aCtrl">
        {{text1}} {{text2}}
    </div>
</body>

Fiddle: http://jsfiddle.net/kkelly/thk9n20o/#base.com

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陌清茗

2021-01-31 09:37
No

HTML is a form of XML, and it is not valid xml to have multiple non-unique attributes on the same element. In other words,
```
<div ng-controller="a" ng-controller="b">
```
is invalid. But what about when we do
```
<div id="a" ng-controller="a">
    <div id="b" ng-controller="b">
        <div id="c">
```
This is valid xml/HTML, but it is not assigning two controllers to the div with id c. This is called Nested Controllers.
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北荒

2021-01-31 09:42

this is surely gonna work...

<!DOCTYPE html>
<html>
<head>
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.16/angular.min.js"></script>
</head>
<body ng-app="myNgApp">
    <div id="div1" ng-controller="anotherController">
        Message: {{message}} <br />       
        <div id="div2" ng-controller="myController">
            Message: {{message}}
        </div>
    </div>

      <div id="div3" ng-controller="myController">
        Message: {{message}}
    </div>

      <div id="div4" ng-controller="anotherController">
        Message: {{message}}
    </div>

    <script>
        var ngApp = angular.module('myNgApp', []);

        ngApp.controller('myController', function ($scope) {
            $scope.message = "This is myController";       
        });

        ngApp.controller('anotherController', function ($scope) {
            $scope.message = "This is anotherController";       
        });
    </script>
</body>
</html>

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死守一世寂寞

2021-01-31 09:44

I've just been faced with the same problem trying to code the tabs with container and I'm going to use a directive, which wraps the content using ng-transclude - this way it will be just one controller for the content and I'll then define another controller on the directive, which can be re-used multiple times with whatever content necessary.

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囚心锁ツ

2021-01-31 09:45
No, you cannot apply two controllers to the same element, but you can apply multiple directives. And directives can have controllers.
```
app.directive('myDirective1', function() {
return {
controller: function(scope) {
  //directive controller
  }
 };
});

app.directive('myDirective2', function() {
return {
controller: function(scope) {
  //directive controller
  }
 };
});
```
and in the HTML:
```
<div myDirective1 myDirective2></div>
```
And as mentioned in the comments below, the two controllers could share the same scope, which is often the desired effect; one of the two controller can request a new scope, but you cannot have two new scopes;

the reason for not allowing two isolated scope on the two directives, is that the view would not know where to get the scope values from, if a scope variable had the same name in the two isolated directive controllers

Here is an interesting read: Why can't multiple directives ask for an isolated scope on the same element?
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Is it possible to apply multiple AngularJS controllers on the same element

No