import { BrowserRouter as Router, Switch, Route } from 'react-router-dom';
ReactDOM.render(
  <Router>
    <App />
  </Router>,
  document.getElementById('root'),
);

import React, { Component } from 'react';
import { Switch, Route } from 'react-router-dom';
import { withRouter } from 'react-router'

class App extends Component {
  state = { prevLocation: '' };

  // Use the context api to retrieve the value in your Link
  getChildContext = () => (
    {
      prevLocation: this.state.prevLocation,
    }
  );

 componentWillReceiveProps(nextProps) {
   if (nextProps.location !== this.props.location) {
     this.setState({ prevLocation: this.props.location.pathname });
   }
 }

 render() {
   return (
     <div>
       <Switch>
         // ...
       </Switch>
     </div>
   );
  }
}

App.childContextTypes = {
  prevLocation: PropTypes.string,
};

export default withRouter(App);

import React from 'react';
class GoBack extends React.Component {
  render() {
    return <Link to={this.context.prevLocation}>click</Link);
  }
}

GoBack.contextTypes = {
  prevLocation: PropTypes.string,
};