How to share the same variable between modules?

Question

I'm using Node.JS with Express.js and I need to share a variable between modules, I have to do that because this variable is a pool of mysql connections, This pool creates 3 Mysql connections at the start of Node.js and then I would like that the other modules will use those connections without recreate other pools. Is this possible? Thanks JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

Answer 1

There are 2 options: make that variable a global one, for ex: global.MySQL_pool = .... This way you can access it everywhere by using MySQL_pool as the variable. pass it for each module where you need it as a function param, for ex: var MySQL_pool = ... var my_db_module = require('./db')(MySQL_pool); where db.js is: module.exports = function (pool) { // access the MySQL pool using the pool param here }