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));
}
};
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 */
});
Can I move my User
class definition to another javascript file and "include" it somehow?
This question is related to
javascript
node.js
I just want to point out that most of the answers here don't work, I am new to NodeJS and IDK if throughout time the "module.exports.yourClass" method changed, or if people just entered the wrong answer.
// MyClass
module.exports.Ninja = class Ninja{
test(){
console.log('TESTING 1... 2... 3...');
};
}
//Using MyClass in seprate File
const ninjaFw = require('./NinjaFw');
let ninja = new ninjaFw.Ninja();
ninja.test();
// Ninja Framework File
class Ninja{
test(){
console.log('TESTING 1... 2... 3...');
};
}
module.exports.Ninja = Ninja;
If you append this to user.js
:
exports.User = User;
then in server.js
you can do:
var userFile = require('./user.js');
var User = userFile.User;
http://nodejs.org/docs/v0.4.10/api/globals.html#require
Another way is:
global.User = User;
then this would be enough in server.js
:
require('./user.js');
Instead of myFile.js write your files like myFile.mjs. This extension comes with all the goodies of es6, but I mean I recommend you to you webpack and Babel
Another way in addition to the ones provided here for ES6
module.exports = class TEST{
constructor(size) {
this.map = new MAp();
this.size = size;
}
get(key) {
return this.map.get(key);
}
length() {
return this.map.size;
}
}
and include the same as
var TEST= require('./TEST');
var test = new TEST(1);
Using ES6, you can have user.js
:
export default class User {
constructor() {
...
}
}
And then use it in server.js
const User = require('./user.js').default;
const user = new User();
Modify your class definition to read like this:
exports.User = function (socket) {
...
};
Then rename the file to user.js
. Assuming it's in the root directory of your main script, you can include it like this:
var user = require('./user');
var someUser = new user.User();
That's the quick and dirty version. Read about CommonJS Modules if you'd like to learn more.
Source: Stackoverflow.com