Global CoffeeScript function?

Question

JavaScript

Hello. I use global functions by declaring them through the window object, can I do something to use my own objects for each file with functions?

window.capitalize_Words = ( $str ) -> "#{ $str.charAt( 0 ).toUpperCase( ) }#{ $str.slice( 1 ) }"

If in a file with functions to insert a line

capitalize_Words = ( $str ) -> "#{ $str.charAt( 0 ).toUpperCase( ) }#{ $str.slice( 1 ) }"

root = exports ? this

then in other files when the function is run, it gives an error
root.capitalize_Words( 'Тест' )

Uncaught ReferenceError: root is not defined

Tell me how to work with global variables and functions? Thanks