CODEWITHSUNDEEP
javascriptnode.jsvariablesexport
Mark
Mark

Reputation: 5038

Recommended way to export variables in Node.js

I have a worker.js file which periodically updates the values of few variables. In other files of my Node.js server I want to access to those vars.

I know how to export them, but it seems they are exported by value - i.e. they have the value they had at the moment I issued the require function.

Of course, I'm interested to access to their latest value. What's the recommended way to do this? A "getter" function or else?

Upvotes: 1

Views: 7931

Answers (1)

gibson
gibson

Reputation: 1086

A possible way to export them by reference is to actually manipulate the module.exports object - like so:

//worker.js
module.exports.exportedVar = 1;
var byValueVar = 2;

setInterval(foo, 2000);

function foo() {
    module.exports.exportedVar = 6;
    x = 8;
}

//otherfile.js
var worker = require('./worker');
console.log(worker.exportedVar); //1
console.log(worker.byValueVar) //2

setInterval(foo, 3000);

function foo() {
    console.log(worker.exportedVar); //6
    console.log(worker.byValueVar); //2
}

Upvotes: 2

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