Now we want to change website more style so normal alert box is not good to see so in this case we want to change it.
There are some library which help you a lot. This is some link which you can use
Option 1: You can use
There are lot of option to customize it. hope you will like it
Option 2 : you can also use
This is very cool and more option to customize
If you need any help then please inform me, i will try to help you