How to require a file in node.js and pass an argument in the request method, but not to the module?

Question

I have a module.js that must be loaded; In order to work needs objectX;

How do I pass the objectX to the module.js in the require method provided by node.js?

thanks

// my module.js objectX.add('abc'); // error: objectX is undefined 

I would like a way to do it, without having to change all my classes because would take a lot of time... and they way it is has good performance for the client side. (I mix clientfiles with serverfiles***)

Answer 1

The module that you write can export a single function. When you require the module, call the function with your initialization argument. That function can return an Object (hash) which you place into your variable in the require-ing module. In other words:

main.js

var initValue = 0; var a = require('./arithmetic')(initValue); // It has functions console.log(a); // Call them console.log(a.addOne()); console.log(a.subtractOne()); 

arithmetic.js:

module.exports = function(initValue) {   return {     addOne: function() {       return initValue + 1;     },     subtractOne: function() {       return initValue - 1;     },   } }