如何最小化pdf-viewer-reactjs的高度

<div style={{ height: '500px' }}>
  <PDFViewer />
</div>

import { Document, Page } from 'react-pdf';

class PDFViewer extends React.Component {
  state = {
    numPages: null,
    pdfHeight: 0,
  };

  onDocumentLoadSuccess = ({ numPages }) => {
    this.setState({ numPages });
  };

  render() {
    const { numPages, pdfHeight } = this.state;

    return (
      <div style={{ height: pdfHeight }}>
        <Document
          file="example.pdf"
          onLoadSuccess={this.onDocumentLoadSuccess}
        >
          {Array.from(new Array(numPages), (el, index) => (
            <Page key={`page_${index + 1}`} pageNumber={index + 1} />
          ))}
        </Document>
      </div>
    );
  }
}