Create a Popup App

[SayanGuha04]

Is your feature request related to a problem? Please describe.
Create a popup app using HTML, CSS and JavaScript

Describe the solution you'd like
https://www.youtube.com/watch?v=AF6vGYIyV8M&list=PLjwm_8O3suyOgDS_Z8AWbbq3zpCmR-WE9&index=13&pp=iAQB

[Yash6012]

@Sbiswas001 @SayanGuha04
Hi! I’d like to contribute on Popup App solution.
Could you please assign this issue to me?