Function Hoisting: Assume that `foo` is the main function

functionHoisting.js

export default function foo() {
  return bar();
}

function bar() {
  return baz();
}

function baz() {
  return 42;
}

noHoisting.js

function baz() {
  return 42;
}

function bar() {
  return baz();
}

export default function foo() {
  return bar();
}