javascript node.js 包含类文件
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node.js include class file
提问by daniel7558
I got 2 files:
我有2个文件：
start.js
开始.js
var ConversationModule = require('./src/classes/conversation/Conversation.js');
ConversationModule.sayhello();
conversation.js
对话.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 following error
在 start.js 中，我无法调用 sayhello() 方法。我收到以下错误
TypeError: object is not a function
I just don't get it why it doesn't work - I'm new to node :)
我只是不明白为什么它不起作用 - 我是节点的新手:)
回答by hexacyanide
You are trying to export ConversationModuleas a function, which it is not. Use this instead:
您正在尝试导出ConversationModule为函数，但事实并非如此。改用这个：
exports.ConversationModule = ConversationModule;
Since you're also assigning the variable as a property of exports, you'd have to call it like this:
由于您还将变量分配为 的属性exports，因此您必须像这样调用它：
var ConversationModule = require('./file').ConversationModule;
ConversationModule.sayhello();
If you don't want to do that, assign the object to module.exports:
如果您不想这样做，请将对象分配给module.exports：
module.exports = ConversationModule;
And call it like this:
并这样称呼它：
var ConversationModule = require('./file');
ConversationModule.sayhello();
回答by Myrne Stol
Given that you've named the file conversation.js, you probably intend to define solely the "conversation module" in that particular file. (One file per logical module is a good practice) In that case, it would be cleaner to change your export code, and leave your require code as you had it originally.
鉴于您已将文件命名为 session.js，您可能打算在该特定文件中单独定义“对话模块”。（每个逻辑模块一个文件是一个好习惯）在这种情况下，更改导出代码会更清晰，并保留原始代码。
start.js
开始.js
var ConversationModule = require('./src/classes/conversation/Conversation.js');
ConversationModule.sayhello();
conversation.js
对话.js
var ConversationModule = new Object();
ConversationModule.sayhello = function () {
console.log("hello");
};
module.exports = ConversationModule;
Assigning something to module.exportsmakes this value available when you require the module with require.
分配东西module.exports使得这个值时，可以使用需要与模块require。
回答by Anthony Ruffino
conversation.js:
对话.js：
var conversationModule = new Object();
conversationModule.sayhello = function () {
console.log("hello");
};
exports.conversationModule = conversationModule;
start.js:
开始.js：
var conversationModule = require('./src/classes/conversation/Conversation.js').conversationModule;
conversationModule.sayhello();
