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angular.js - $injector注入器里的ng是什么意思？

在看一个$injector用法的demo，下面是demo的所有代码：

<!DOCTYPE html>
<html lang="en" ng-app="a4_6">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script type="text/javascript" src="../bower_components/angular/angular.min.js"></script>
</head>
<body>
  <h1>has和get方法的示例</h1>
<p ng-controller="c4_6">
    <!--视图组件-->
</p>
</body>
<script type="text/javascript">
   var a4_6 = angular.module('a4_6',[])
           .factory('$custom', function(){
               return {
                   print: function(msg){
                       console.log(msg);
                   }
               };
           });
    var injector = angular.injector(['a4_6','ng']);
    var has = injector.has('$custom');
    console.log(has);
    if(has){
        var custom = injector.get('$custom');
        custom.print("控制台输出任意的内容");

    }
    a4_6.controller('c4_6',['$scope','$custom', function($scope,$custom){
        //控制器代码

    }]);
</script>
</html>

var injector = angular.injector(['a4_6','ng']); 这句话里的ng是什么意思啊？

PHP中文网PHP中文网2744 days ago520

reply all(1)I'll reply

  • 过去多啦不再A梦

    过去多啦不再A梦2017-05-15 17:07:17

    Refers to the core ‘ng’ module, that is, the angular core module var injector = angular.injector(["ng"]) creates its own $injector instead of the $injector automatically created when the application starts. To create $injector yourself, you need to pass a module list. In the above example, there are two modules 'a4_6' and 'ng'. If you need to use any service in Angular core you must explicitly specify ng module. The angular.module method will assume that you have a dependency on the ng module and will quietly add "ng" to your dependency list, while the injector function will not make any assumptions about the dependency module.

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