包括Node.js中另一个文件的JavaScript类定义 [英] Including JavaScript class definition from another file in Node.js

问题描述

我正在为Node.js编写一个简单的服务器，我正在使用我自己的类 User ，它看起来像：

I'm writing a simple server for Node.js and I'm using my own class called User which looks like:

function User(socket) {
    this.socket = socket;
    this.nickname = null;

    /* ... just the typical source code like functions, variables and bugs ... */

    this.write = function(object) {
        this.socket.write(JSON.stringify(object));
    }
};

然后在这个过程中我实例化了很多：

and then later in the process I'm instantiating it a lot:

var server = net.createServer(function (socket) {
    /* other bugs */
    var user = new User(socket);
    /* more bugs and bad practise */
});

我可以将用户类定义移动到另一个javascript文件并以某种方式包含它？

Can I move my User class definition to another javascript file and "include" it somehow?

推荐答案

甚至你可以简单地这样做

And even you can simply do this

user.js

class User {
    //...
};

module.exports = User;

server.js

const User = require('./user.js');

// Instantiate User:
let user = new User();

P.S。并且不要使用全局变量。它会在未来产生潜在的冲突。

P.S. And don't use globals. It creates potential conflicts in the future.

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