scroll up the page to the top in selenium

Question

How to scroll the webpage to the top of the page.

I know scrolling the page to the bottom is:

window.scrollTo(0,document.body.scrollHeight)
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Answer 1

This solution also works correctly, I've checked it:

((JavascriptExecutor) driver)
    .executeScript("window.scrollTo(0, -document.body.scrollHeight)");