Question

I have two files in a node.js project; timer.js and app.js.

Basically what timer does is, it has a variable myNumber which increases with a setInterval function. I would like to be able to access that variable whenever I need it, currently I am using the following code:

var myNumber = 0;

setInterval(myMethod, 1);

function myMethod() {
    myNumber++;
    module.exports = myNumber;
}

and I got the feeling this is very wrong (I am a complete newbie), can anyone enlighten me on how to do it the right way?

What I’d like to do is that every time I am getting a variable like this in another file, I get the current value of myNumber. Currently I am doing it this way, and it’s working (still, this must be wrong):

exports.index = function(req, res){
    var timer = require("../timer.js");
    res.end("timer tick at: " + timer);
};

Answer 1

As mentioned in my comment, I would just attach myNumber to module.exports:

module.exports.myNumber = 0;

setInterval(myMethod, 1);

function myMethod() {
    module.exports.myNumber++;
}

You can update your exported object as much as you want because other modules that require your module will share the same reference as module.exports in your module code.