I have a server.js which looks like:
var app1 = require('./app1.js'); app1.start(); var app2 = require('./app2.js'); app2.start(); Now I have a common.js that is used in in both app1.js and app2.js.
So in app1.js I have:
var common = require('./common.js'); and in app2.js I have:
var common = require('./common.js'); I'm wondering if this is ok to do this. Does node use the same reference in both these situations, or is it duplicated?
Yes, it is absolutely fine to do this. require() essentially includes the contents of the target page on the current page. If you need to use the modules on multiple pages, you will need to use require() on each page.
var common = require('./common.js') will result in the variable common having the exact same structure as whatever is returned by module.exports in common.js. In fact, they'll be the exact same object.
There's some great documentation regarding this at SitePoint.
Hope this helps! :)
It is okay. However, they do use the same references which is cached by node. So try not to mutate the required files by mutating object properties, otherwise you may encounter some unexpected behavior.
