text: import * as React from 'react';
  import { useStyletron } from 'styletron-react';
  
  export function Sidebar() {
    const [css] = useStyletron();
    return (
      <div className={css({
        height: '100%',
        width: '100px',
        backgroundColor: '#f6f6f6',
      })}>
        item 1
      </div>
    );
  };
  