Question

I have written following code to alert messages when Node.prototype.appendChild(obj) is called.

var _appendChild = Node.prototype.appendChild;
Node.prototype.appendChild = function(object){
    alert("append");
    return _appendChild.apply(this,[object]);           ;
};  

And it does not work in IE8..

I have read this link in which the answer said prototype functions can’t be overridden in IE

How do I override javascript's cloneNode?

But I still want to ask if there is any work around to do what I want.

Thanks

Answer 1

Thanks kennebec

Finally I found I could not implement it just because it was running in quirks mode…
I wrote an example in which somebody else may be interested .

var elementPrototype = typeof HTMLElement !== "undefined"
        ? HTMLElement.prototype : Element.prototype;

var _appendChild = elementPrototype.appendChild; 

elementPrototype.appendChild = function(content){
    //Do what you want-----

    alert("Append Child!");

    //---------------------
    return _appendChild(content);
}