docs: function setRandomChart() {
    var chart = { msg: "", osX: [], osY: [] };
    for (var i=0,x=-10; i<20; i++,x++) {
      chart.osX[i] = x;
      chart.osY[i] = Math.random();
    }
    ReactDOM.render(
      <ChartLine data={chart}/>,
      document.getElementById('app')
    );
  }