如何在React中使用FileReader？(得到一个奇怪的错误)

import React, { useState } from 'react';

const FileReaderComponent = () => {
  const [fileContent, setFileContent] = useState('');

  const handleFileRead = (e) => {
    const file = e.target.files[0];
    const reader = new FileReader();

    reader.onload = (event) => {
      const content = event.target.result;
      setFileContent(content);
    };

    reader.onerror = (event) => {
      console.error('文件读取错误:', event.target.error);
    };

    reader.readAsText(file);
  };

  return (
    <div>
      <input type="file" onChange={handleFileRead} />
      <div>{fileContent}</div>
    </div>
  );
};

export default FileReaderComponent;