content: import React from 'react';
  import ReactDOM from 'react-dom';
  
  import JqxChart from '../../../jqwidgets-react/react_jqxchart.js';
  
  class App extends React.Component {
      render() {
          let sampleData = [{ a: 0.35, b: 14.5, c: 0.35, d: 0.1 }, { a: 1, b: 2.5, c: 1, d: 0.2 }, { a: 10, b: 0.5, c: 10, d: 50 }, { a: 100, b: 205, c: 100, d: 40 }, { a: 1, b: 100, c: 1, d: 200 }, { a: 5.11, b: 10.13, c: 5.11, d: 0.2 }, { a: 20.13, b: 10.13, c: 20.13, d: 4 }];
  
          let padding = { left: 5, top: 5, right: 5, bottom: 5 };
  
          let titlePadding = { left: 0, top: 0, right: 0, bottom: 10 };
  
          let xAxis =
              {
                  gridLines: { dashStyle: '2,2' },
                  tickMarks: { dashStyle: '1,2' } 
              };
  
          let valueAxis =
              {
                  logarithmicScale: true,
                  logarithmicScaleBase: 2,
                  unitInterval: 1,
                  title: { text: 'Value' },
                  labels: {
                      formatSettings: { decimalPlaces: 3 },
                      horizontalAlignment: 'right'
                  },
                  gridLines: { dashStyle: '2,2' },
                  tickMarks: { dashStyle: '1,2' }
              };
  
          let seriesGroups =
              [
                  {
                      type: 'rangecolumn',
                      series: [
                          { dataFieldFrom: 'a', dataFieldTo: 'b', displayText: 'from A to B' },
                          { dataFieldFrom: 'c', dataFieldTo: 'd', displayText: 'from C to D' }
                      ]
                  }
              ];
          return (
              <JqxChart style={{ width: 850, height: 500 }}
                  title={'Logarithmic Column Range'} description={'logarithmic scale with base 2'}
                  enableAnimations={true} padding={padding} xAxis={xAxis}
                  titlePadding={titlePadding} source={sampleData} 
                  valueAxis={valueAxis} colorScheme={'scheme07'} seriesGroups={seriesGroups}
              />
          )
      }
  }
  
  ReactDOM.render(<App />, document.getElementById('app'));
  