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Up/down button

importance: 5

Create a “to the top” button to help with page scrolling.

It should work like this:

  • While the page is not scrolled down at least for the window height – it’s invisible.
  • When the page is scrolled down more than the window height – there appears an “upwards” arrow in the left-top corner. If the page is scrolled back, it disappears.
  • When the arrow is clicked, the page scrolls to the top.

Like this:

Open a sandbox for the task.