React-Leaflet example

https://github.com/PaulLeCam/react-leaflet

HTML

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.7/leaflet.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.7/leaflet.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-core/6.1.19/browser.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.0.1/react.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.0.1/react-dom.js"></script>
<script src="https://npmcdn.com/[email protected]/dist/react-leaflet.js"></script>
<div id="container"></div>

CSS

.leaflet-container {
    height: 400px;
    width: 100%;
}

Babel + JSX

const React = window.React;
const {
  Map, 
  TileLayer, 
  Marker, 
  Popup
} = window.ReactLeaflet;

class SimpleExample extends React.Component {
  constructor() {
    super();
    this.state = {
      lat: 51.505,
      lng: -0.09,
      zoom: 13,
    };
    this.zoomIn = () => this.setState({zoom: this.state.zoom+1})
    this.zoomOut = () => this.setState({zoom: this.state.zoom-1})
  }

  render() {
    const position = [this.state.lat, this.state.lng];
    return ( < Map center={position} zoom={this.state.zoom}>
      < TileLayer 
        attribution='&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
        url='http://{s}.tile.osm.org/{z}/{x}/{y}.png' 
      />
      < Marker position={position} >
        < Popup >
          < span >
            <button onClick={this.zoomOut}>
              Zoom out
            </button >
            < button onClick = {this.zoomIn} >
              Zoom in
            < /button>
          < /span>
        </Popup >
      < /Marker>
      </Map >
    );
  }
}

window.ReactDOM.render(<SimpleExample />, document.getElementById('container'));