I want you to act as a web developer and please write some code for me to create a pop-up notification feature for the website.

I want you to act as a web developer and please write some code for me to create a pop-up notification feature for the website.
Entrance animation: When the notification appears, there should be an animation effect of sliding in from the right or fading in.
Opening Animation: When closed, there should be a smooth fade-out or slide-out animation; do not abruptly disappear.
Progress Indicator: A small progress bar is displayed at the bottom or top of the notification, providing an intuitive countdown until it automatically disappears.