menu rollover

Can you expand on this?

I want to click on the menu item and the page scrolls to the right place, without switching to another page.

The menu I have is this: site

And I want you to do like this:site2

If you’re still interested in this feature, check out Hack #3 at

https://premium.wpmudev.org/blog/five-hacks-twenty-seventeen/?mkpp=b&utm_expid=3606929-97.J2zL7V7mQbSNQDPrXwvBgQ.1&utm_referrer=https%3A%2F%2Fwww.google.com%2F