Node.js includes a class file

Question

I have 2 files:

start.js

var ConversationModule = require('./src/classes/conversation/Conversation.js'); ConversationModule.sayhello(); 

conversation.js

  var ConversationModule = new Object(); ConversationModule.sayhello = function () { console.log("hello"); }; exports.ConversationModule = ConversationModule(); 

In start.js, I cannot call the sayhello () method. I get the following error

 TypeError: object is not a function 

I just don't understand why this is not working - I'm new to node :)

Answer 1

You are trying to export a ConversationModule as a function that it is not. Use this instead:

 exports.ConversationModule = ConversationModule; 

Since you also assign the variable as the exports property, you should call it like this:

 var ConversationModule = require('./file').ConversationModule; ConversationModule.sayhello(); 

If you do not want to do this, assign a module.exports object:

 module.exports = ConversationModule; 

And name it as follows:

 var ConversationModule = require('./file'); ConversationModule.sayhello(); 

Answer 2

Given that you named the chat.js file, you probably intend to define only the “talk module” in this particular file. (One file per logical module is good practice) In this case, it would be easier to change the export code and leave the required code as you originally had it.

start.js

 var ConversationModule = require('./src/classes/conversation/Conversation.js'); ConversationModule.sayhello(); 

conversation.js

  var ConversationModule = new Object(); ConversationModule.sayhello = function () { console.log("hello"); }; module.exports = ConversationModule; 

Assigning something to module.exports makes this value available if you need a module with require .

Answer 3

conversation.js:

 var conversationModule = new Object(); conversationModule.sayhello = function () { console.log("hello"); }; exports.conversationModule = conversationModule; 

start.js:

 var conversationModule = require('./src/classes/conversation/Conversation.js').conversationModule; conversationModule.sayhello();