Recharts Custom Tooltip

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-core/5.8.24/browser.js"></script>
<script src="https://npmcdn.com/react/dist/react-with-addons.min.js"></script>
<script src=" https://npmcdn.com/react-dom/dist/react-dom.min.js"></script>
<script src=" https://npmcdn.com/react-dom/dist/react-dom-server.min.js"></script>
<script src=" https://npmcdn.com/recharts/umd/Recharts.min.js"></script>
<script src="https://facebook.github.io/react/js/jsfiddle-integration-babel.js"></script>

<div id="container">
    <!-- This element's contents will be replaced with your component. -->
</div>

CSS

body {
  margin: 0;
}
#container {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  padding: 10px;
  width: 800px;
  height: 800px;
  background-color: #fff;
  position: relative;
}
.custom-tooltip {
    position: static;
    width: 120px;
    margin-left: -85px;
    margin-top: 200%;
    line-height: 24px;
    border: 1px solid #AAA;
    background-color: rgba(255, 255, 255, 0.8);
    text-align: center;
    padding: 5px 10px;
    z-index: 999999;
}
.custom-tooltip  .label {
  margin: 0;
  color: #666;
  font-weight: 700;
}
.custom-tooltip  .desc {
  margin: 0;
  color: #999;
}
.custom-tooltip  .intro {
  margin: 0;
}

JavaScript 1.7

const {PropTypes} = React;
const {BarChart, Bar, XAxis, YAxis, CartesianGrid, Tooltip, Legend} = Recharts;
const data = [
      {name: 'A', uv: 4000, pv: 2400, amt: 'Attenzione'},
      {name: 'B', uv: 3000, pv: 1398, amt: 'Bravura'},
      {name: 'C', uv: 2000, pv: 9800, amt: 'Colorado'},
      {name: 'D', uv: 2780, pv: 3908, amt: 'Delivery'},
      {name: 'E', uv: 1890, pv: 4800, amt: 'Engagement'},
      {name: 'F', uv: 2390, pv: 3800, amt: 'Framework'},
      {name: 'G', uv: 3490, pv: 4300, amt: 'Groove'},
];

const CustomTooltip  = React.createClass({
  propTypes: {
    type: PropTypes.string,
    data: PropTypes.array.isRequired,
    payload: PropTypes.array,
    label: PropTypes.string,
  },

  getIntro(label) {
  	const { data } = this.props;
    return data.find(el => el.name === label).amt || '';
  },

  render() {
    const { active } = this.props;

    if (active) {
      const { payload, label } = this.props;
      const { value } = payload[0];
      return (
        <div className="custom-tooltip" />
      );
    }

    return null;
  }
});

const SimpleBarChart = React.createClass({
	render () {
  	return (
    	<BarChart width={600} height={300} data={data}
            margin={{top: 5, right: 30, left: 20, bottom: 5}}>
       <XAxis dataKey="name"/>
       <YAxis/>
       <Tooltip 
       cursor={false}
       coordinate={{ x: 0, y: 0}}
       content={<CustomTooltip data={data} />}/>
       <Bar dataKey="pv" barSize={20} fill="#8884d8" />
      </BarChart>
    );
  }
})

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