Example advising function and use.

advise.js

const advise = (fn, preFn = (...args) => args, postFn = (...args) => args) =>
  (...args) =>
    postFn(fn(...preFn(...args)));


add = (x, y) =>
  x + y;

advisedAdd = advise(
  add,
  (x, y) => [x + 1, y + 1],
  output => console.log(`Output is ${output}`)
);