Detecting Browser Autofill

Question

How do you tell if a browser has auto filled a text-box? Especially with username & password boxes that autofill around page load.

My first question is when does this occur in the page load sequence? Is it before or after document.ready?

Secondly how can I use logic to find out if this occurred? Its not that i want to stop this from occurring, just hook into the event. Preferably something like this:

if (autoFilled == true) {

} else {

}

If possible I would love to see a jsfiddle showing your answer.

Possible duplicates

DOM event for browser password autofill?

Browser Autofill and Javascript triggered events

--Both these questions don't really explain what events are triggered, they just continuously recheck the text-box (not good for performance!).

Answer 1

I succeeded on chrome with :

    setTimeout(
       function(){
          $("#input_password").focus();
          $("#input_username").focus();
          console.log($("#input_username").val());
          console.log($("#input_password").val());
       }
    ,500);

Answer 2

For google chrome autocomplete, this worked for me:

if ($("#textbox").is(":-webkit-autofill")) 
{    
    // the value in the input field of the form was filled in with google chrome autocomplete
}