Question

If I have a function like this:

 function showAlert() {
   alert("1");
 }

Is there a way to bind additional functionality to the same function in a different part of the page?

Like this:

 function showAlert() {
   alert("1");
   alert("2");
 }

Answer 1

You can overwrite the function with a new function that calls the old function.

 function showAlert() {
   alert("1");
 }

showAlert = (function (original){
 return function () {
   original();
   alert("2");
 }
}(showAlert));

showAlert();

​