Notify User If There Is Something New In Javascript

I would like to create something like this in Javascript, and its better if i can do it with Extjs: showing a small notification icon on a button when the page contains something

Solution 1:

This is possible. You have to save a Cookie in your browser once the user click the button. If the Cookie is set, then you can hide the notification.

Here an example:

var myCookie = Ext.util.Cookies.get("YourCookieName");
if(!myCookie){
    // show notification
}

And on button click:

Ext.util.Cookies.set("YourCookieName", 1);