JAVASCRIPT

React Scroll

$ npm install react-scroll

# or yarn

$ yarn add react-scroll

ex)
import {Link} from 'react-scroll'
<Link  to="about" spy={true} smooth={true}>About</Link>
....	....	....	....
<div id="about" style={{height: 500}}>
  <h1>This is About section</h1>
  Lorem ipsum dolor sit amet consectetur adipisicing elit. Id, repellendus. Totam nihil similique a repellat minus dolor amet quasi. Corporis nulla quaerat iste, sed quasi ab dolorem maxime minima animi.
</div>

react-scroll

$ npm install react-scroll

# or yarn

$ yarn add react-scroll

react scroll

//Smooth Scroll in React js
function smoothScroll()
 {
    document.querySelector('.your_class or #id here').scrollIntoView(
     {
        behavior: 'smooth'
	 });
 };