How to make the arrow up to the beginning of the article?

How can I make the arrow to the side back to the top when the user scroll the first screen. An example of such implementation of that decision is here When the user starts to scroll down, it becomes possible to always return to the beginning material.
July 2nd 19 at 16:57
3 answers
July 2nd 19 at 16:59
It is strange that it is just not found in Google
July 2nd 19 at 17:01
In the catalogue there are many such plugins, there are plenty to choose from.
Don't remember exactly, but mine, once upon a time used a Simple Scroll to Top Button for this task.
July 2nd 19 at 17:03

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