toastr.js
Android Style Toast Notification Plugin for Web
Since toastr.js is written in vanilla javascript, it is light weight and it doesn't require any additional dependencies.
toastr.js is developed with the intention of providing Android Toast style notifications for websites.
Although, the default style is the replica of Android toast, you can still customize it with available options like theme, position, animation etc...
Official documentation https://www.voidtricks.com/toatr/
Live Demo https://demo.voidtricks.com/toatr/