[Function call interception (wrapping)] #JavaScript #growth

intercept.js

// new
return (...args) => {
  try {
    return handler.call(this, ...args);
  } catch(e) {
    return this.onError(e);
  }
};

// old school
const originalFunc = foo.XXX;
foo.XXX = function () {
    return originalFunc.apply(foo, arguments);
};

// see also:
// http://2ality.com/2015/10/intercepting-method-calls.html