NodeJS export class with static methods

Question

I’m trying to develop a class with static methods on a NodeJs application, as a Config module purpose.
I would like to access to it from different modules without instantiate every time a new object.

1) Is it correct to use an approach like below, avoiding the class prototype?

function Config(){

}

Config.svrPort=function(){
    return 8080;
}

Config.dbName=function(){
    return "myDbName";
}

module.exports = Config;

2) Are there any other solutions?

3) Is it also a valid approach to put different objects in the same module (e.g. config.js) like this?

exports.server=function(){
    return{
        port:8080
    };
};

exports.database=function(){
    return{
        name:"myDbName",
        user:"root",
        password:"myPassword",
        host:"localhost",
        port:3306
    };
};

and finally to use it as:

var config = require('./config');
config.server().port
config.database().name

Answer 1

That is the correct approach although in your example you could simply store the values as primitives: Config.SVR_PORT = 8080, note I rewrote those as "constants", since I don't recommend changing statics.

When this is said, then please note: Do not put any sensitive data (passwords, etc) in your JavaScript files, but instead put these in a config file. This will separate config from code. And help you not to leak any potential critical information.

db-secrets.json

{
  "password": "...",
  ...
}

Then you can access the secrets by making a wrapper module:

// Wrapper module for db-secrets.json
var fs = require('fs');
exports = JSON.parse(fs.readFileSync('db-secrets.json'), 'utf8');

Or make a db connect module db-connect.js:

var fs = require('fs');
var db = require('db');
var db_secrets = JSON.parse(fs.readFileSync('db-secrets.json'), 'utf8');

export = function() {
  return db.connect(db_secrets.user, db_secrets.password, ...);
};

If you use git for source control you can easily add the following to your .gitignore which will make sure your sensitive file is not added to git:

.gitignore

db-secrets.json