打开你的音箱，将页面滚动到底部，开始Elevator.js之旅吧！
Because you're already at the top.
So a "back to top" button wouldn't make sense.
Down down down.
Wow, all this scrolling.
This had better be worth it.
It's going to take ages to get back to the top.
If only we had an easy way to get back...
...that is both functional and fun.
I call "back to top" buttons elevators...
...they should really behave more like them.
Ok, here we are... click that elevator!