I have a file (let's call it `foo`) that I import a module into using RequireJS (let's call it `bar`). Something like:

foo.js:

function doStuff() {
  require(['path/to/bar/'], function(bar) => { //code// })
}

However, bar calls a function (let's call it func) which is not defined in bar, only called in the code. How can I define func for use in bar? Something like:

bar.js

function doMoreStuff() {
  func()
}

foo.js

function doStuff() {
  require(['path/to/bar/'], function(bar) => { 
    bar.func = () => { console.log("hello world!") }
    bar.doMoreStuff()
  })
}

Note: I know bar.js isn't written as a module should be, pretend it is - everything works in my code but I get an error that the function isn't defined (because it isn't, hence the question on how to define it)