App.jsx

import {withRouter} from 'react-router-dom';

class App extends React.Component {
  constructor() {
    super();
    this.state = {path: ''}
  }
  
  componentDidMount() {
    let pathName = this.props.location.pathname;
    this.setState(() => {
      return {
        path: pathName,
      }
    })
  }
  
  render() {
    return (
      <div>
        <h1>Hi! I'm being rendered at: {this.state.path}</h1>
      </div>
    )
  }
}

export default withRouter(App);