content: import React from 'react';
  import ProgressBar from '../../src/ProgressBar';
  import Spinner from '../../src/Spinner';
  
  class Demo extends React.Component {
      render() {
          return (
              <div>
                  <p>Simple MDL Progress Bar</p>
                  <ProgressBar progress={44} />
  
                  <p>MDL Progress Bar with Indeterminate Progress</p>
                  <ProgressBar indeterminate={true} />
  
                  <p>MDL Progress Bar with Buffering</p>
                  <ProgressBar progress={33} buffer={87} />
  
                  <p>MDL Spinner Component</p>
                  <Spinner />
  
                  <p>MDL Spinner Component with Single Color</p>
                  <Spinner singleColor={true} />
              </div>
          );
      }
  }
  
  
  React.render(<Demo />, document.getElementById('app'));
  