Get Map instance

demo.js

import React from 'react';
import ReactDOM from 'react-dom';
import {Gmaps} from 'react-gmaps';

const App = React.createClass({

  getInitialState() {
    return {
      isMapCreated: false
    };
  },

  onMapCreated(map) {
    this.setState({
      isMapCreated: true,
      map
    });
  },

  handleClick() {
    console.log(this.state.map.fitBounds);
    console.log(this.refs.gmaps.getMap().fitBounds);
  },

  render() {
    return (
      <div>
        <Gmaps
          ref="gmaps"
          width={400}
          height={300}
          lat={51.5258541}
          lng={-0.08040660000006028}
          zoom={12}
          onMapCreated={this.onMapCreated}/>
        {this.state.isMapCreated &&
          <button onClick={this.handleClick}>fitBounds</button>
        }
      </div>
    );
  }

});

ReactDOM.render(<App />, document.getElementById('gmaps'));