Tasks That Can Be Done with Pure HTML and CSS
<i>>In 2019, you can do this:  html{ scroll-behavior:smooth; }</i><p>In 2019, caniuse.com says <i>scroll-behavior</i> is not available in Apple Safari or MS IE/Edge:<p><a href="https://caniuse.com/#search=scroll-behavior" rel="nofollow">https://caniuse.com/#search=scroll-behavior</a><p>None of my friends with iPhones install Firefox or Chrome on iOS.  They all just use the default Safari browser.