Just do a require('./yourfile.js');
Declare all the variables that you want outside access as global variables.
So instead of
var a = "hello"
it will be
GLOBAL.a="hello"
or just
a = "hello"
This is obviously bad. You don’t want to be polluting the global scope.
Instead the suggest method is to export
your functions/variables.
If you want the MVC pattern take a look at Geddy.