React ScrollToTop Component.

ScrollToTop.js

// @flow
import { Component } from 'react';
import { withRouter } from 'react-router-dom';

class ScrollToTop extends Component {
  componentDidMount() {
    window.scrollTo(0, 0);
  }

  render() {
    return this.props.children ? this.props.children : null;
  }
}

export default withRouter(ScrollToTop);