Question

I’d like to write a Chrome extension that works with a particular JS-based chat application. It needs to be made aware every time the chat receives a message.

Now, I can obviously do this easily by setting up a timer and checking to see if $("chat-messages").childElements().length has increased, but I’d rather go with the more elegant method of setting up an event handler of some sort to fire every time appendChatMessage() is invoked. Is there a way to do this?

var oldfunc = appendChatMessage;
appendChatMessage = function() { eval(oldfunc); myChatMessageReceivedHandler(); }

Doesn’t seem to be working.

Answer 1

var oldfunc = appendChatMessage;
appendChatMessage = function() { eval(oldfunc(); myChatMessageReceivedHandler(); }

Should work, depending on the context.