Answers for "scrollto smooth"

smooth scroll css

html {
  scroll-behavior: smooth;
}

/* No support in IE, or Safari
You can use this JS polyfill for those */
http://iamdustan.com/smoothscroll/

js scrollto

element.scrollTo(x, y);
window.scrollTo(x, y);
element.scrollTo({
  top: 100,
  left: 100,
  behavior: 'smooth'
});