call javascript function whenever object is created

Question

How to call any javascript function whenever object is created.

well i am not sure but, is there any way to call javascript function when i create any object.?

var myScroll = new iScroll("wrapper");

function objectCreated() {
    alert("yes created")
}

here i want to call function objectCreated function when i create iScroll object. i know i can call function objectCreated from iScroll constructor but i dont want to make change in iscroll.

I'm not sure if it's possible for *any* object. That said, you can patch `iScroll` without having to change its source file. Is that acceptable? — pimvdb, Aug 20 '12 at 09:21
yes, but how can i do that.? i don't have any idea about that. — Sunil Dodiya, Aug 20 '12 at 09:23

score 1 · Answer 1 · answered Aug 20 '12 at 09:26

You can't intercept any object creation, but you can patch iScroll in this case:

// overwrite with a patched function
iScroll = (function(old) {
  return function() {
    // call your interceptor function
    objectCreated();

    // pass everything through to the original iScroll function
    return old.apply(this, arguments);
  };
})(iScroll);

score 0 · Answer 2 · answered Aug 21 '12 at 14:35

I'll add a new answer. I patched the iScroll (I'll make a pull request for cubiq later). Demo can be seen here: http://www.hakoniemi.net/labs/iscroll/ and the patched iScroll can be found here: https://github.com/zvona/iscroll/blob/master/src/iscroll.js

In brief the code looks like this:

myIScroll = new iScroll("myScroll", {
    "onCreate" : function() { alert('created'); },
    "onDestroy" : function() { alert('destroyed'); }
});

call javascript function whenever object is created

2 Answers2