Remembering the scroll position in the browser?

Question

JavaScript

Hello.
Browsers are getting smarter and smarter. If you look at half the page and then refresh it, the focus will remain on what you have not read. And that's great.
Does anyone know what this is called and is it possible to see it in js?

Answer 1

function getBodyScrollTop()
{
return self.pageYOffset || (document.documentElement && document.documentElement.scrollTop) || (document.body && document.body.scrollTop);
}
returns the number of pixels on the page that are not visible from above.

Answer 2

The Window object has scrollBy() and scrollTo() methods. Isn't it?