Javascript 如何在NodeJS中调用导出的函数？哪一个可以嵌套？

这是我正在导出的

app.js

中的函数：

var app = {
  start: function() {
    //sample function
    exports.msgReceived = function() {
      return "Tomorrow 8pm near city hall";
    }
  }
}
module.exports = app;

我有一个名为

messages.js

的文件，我想在其中调用

start

函数和

msgReceived

函数：

let subscriber = require('app');

it('server gets connected', function(done) {
  subscriber.start(); // working
  subscriber.msgReceived(); // not working
  done();
});

我怎么能做到

---

因为使用

var

关键字，我只能访问

start

功能。我的代码编辑器IntelliSense没有指向

msgReceived

函数。

您可以这样做，在运行

start（）

后在应用程序对象上设置新函数

如果你想让intellisense工作，你可能必须包括

var app = {
  start : ...,
  msgReceived: null // or undefined... or anything.
}

也许这会有帮助：

var app = {
  start: function() {
    //sample function
    let msgReceived = function() {
      return "Tomorrow 8pm near city hall";
    };
    return {msgReceived: msgReceived};
  }
}
module.exports = app;

var app = {
  start: function() {
    //sample function
    let msgReceived = function() {
      return "Tomorrow 8pm near city hall";
    };
    return {msgReceived: msgReceived};
  }
}
module.exports = app;

let subscriber = require('app');

it('server gets connected', function(done) {
  let start = subscriber.start(); // working
  let msg = start.msgReceived(); // should work
  done();
});