我如何定义使用打字稿类，不污染在全球范围内的AngularJS服务？ [英] How can I define an AngularJS service using a TypeScript class that doesn't pollute the global scope?

问题描述

我使用AngularJS和打字稿。我想用一个打字稿类，这样实现一个AngularJS服务：

I am using AngularJS and TypeScript. I want to implement an AngularJS service using a Typescript class, like this:

class HelloService {
    public getWelcomeMessage():String {
        return "Hello";
    }
}

angular.module('app.services.helloService', []).factory('helloService', () => {
    return new HelloService();
});

这编译为下面的JavaScript code：

This compiles to the following javascript code:

var HelloService = (function () {
    function HelloService() {
    }
    HelloService.prototype.getWelcomeMessage = function () {
        return "Hello";
    };
    return HelloService;
})();

angular.module('app.services.helloService', []).factory('helloService', function () {
    return new HelloService();
});

这与污染变量HelloService的，我显然不希望全局命名空间。 （使用Chrome的控制台，我验证了HelloService的是一个对象。）我怎样才能解决/避免这个问题？

This pollutes the global namespace with the variable HelloService, which I obviously don't want. (Using Chrome's console I verified that HelloService was an object.) How can I solve/avoid this problem?

我尝试了很明显的：

angular.module('app.services.helloService', []).factory('helloService', function () {
    class HelloService { ...} 
    return new HelloService();
});

但是这给了我一个编译错误（意外令牌。预计'声明'）。

but that gives me a compile error ("Unexpected token; 'statement' expected.").

一个可行的办法，我能想到用打字稿的进口和出口在某种程度上，这反过来将使用RequireJS的。这可能会定义一个函数内包裹HelloService的，从而避免了HelloService的全球范围内的污染。不过，我并不想用RequireJS在我AngularJS应用现在，因为我认为AngularJS是我的使用不够好，这增加了复杂性。

One possible solution I can think of is using TypeScript's import and export somehow, which in turn will use RequireJS. This probably will wrap the HelloService within a define function, thus avoiding pollution of the global scope with HelloService. However, I don't want to use RequireJS in my AngularJS application for now, as I think AngularJS is good enough for my use, and it adds complexity.

所以，我的问题是，我怎么可以定义使用打字稿类的AngularJS服务，不污染在全球范围内？

So, my question is, how can I define an AngularJS service using a TypeScript class that doesn't pollute the global scope?

推荐答案

我应该提供什么我实际上做结束：

I should provide what I actually ended doing:

module MyModule {
    export class HelloService {
        public getWelcomeMessage():String {
            return "Hello";
        }
    }

    angular.module('app.services.helloService', []).factory('helloService', () => {
        return new HelloService();
    });
}

在这种方式我可以使用

return new HelloService();

而不是

return new MyModule.HelloService();

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