JSモジュール

fun-hooks

import funHooks from 'fun-hooks';

let createHook = funcHooks({
  useProxy: false,
  ready: funHook.ASYNC | funcHooks.QUEUE
});

// Sync (before, after)
function sum(a, b) {
  return a + b;
}

let hookedSum = createHook('sync', sum);

// before
hookedSum.before(function(next, a, b) {
  a = a + 1  
  next(a, b);
});

// after
hookedSum.after(function(next, result) {
  next(result + 1);
});

let result = hookedSum(1, 1);

// hookedSum(1, 1) => hookedSum.before(1, 1) => sum(2, 1) => hookedSum.after(3) => 4

// Async (before, after)
function increment(a, b, callback) {
  callback(a + 1, b + 1);
}
let hookedIncrement = createHook('async', increment);

hookedIncrement.before(function(next, a, b) {
  a = a + 1;
  next(a, b);
});

hookedIncrement.after(function(next, a, b) {
  next(a, b + 1);
});

hookedIncrement(1, 1, function(a, b) {
  console.log(a, b); // 3, 3
});