Will a new database connection be created with every import?

Question

Node.js

There are 3 files:

// database.js
const db = require("knex")({
//...connection_info
})

module.exports = db

// index.js
const db = require("./database")

// action.js
const db = require("./database")

The question is, will there be 2 connections for two files: index.js and action.js, or will they use one single connection? If two different connections are created, how can you make sure that one single connection is used?

Answer 1

Once.
Nodejs caches modules.