How do I wrap a function in Javascript?

Question

I\'m writing a global error handling \"module\" for one of my applications.

One of the features I want to have is to be able to easily wrap a function with a t

Answer 1

Function wrapping in good old fashion:

//Our function
function myFunction() {
  //For example we do this:
  document.getElementById('demo').innerHTML = Date();
  return;
}

//Our wrapper - middleware
function wrapper(fn) {
  try {
    return function(){
      console.info('We add something else', Date());
      return fn();
    }
  }
  catch (error) {
    console.info('The error: ', error);
  }
}

//We use wrapper - middleware
myFunction = wrapper(myFunction);

The same in ES6 style:

//Our function
let myFunction = () => {
  //For example we do this:
  document.getElementById('demo').innerHTML = Date();
  return;
}

//Our wrapper - middleware
const wrapper = func => {
  try {
    return () => {
      console.info('We add something else', Date());
      return func();
    }
  }
  catch (error) {
    console.info('The error: ', error);
  }
}

//We use wrapper - middleware
myFunction = wrapper(myFunction);