如何使用React和JavaScript将.txt文件转换为JSON

npx create-react-app txt-to-json-converter

cd txt-to-json-converter
npm install fs

import React, { useState } from 'react';
import fs from 'fs';

const FileConverter = () => {
  const [textFile, setTextFile] = useState('');
  const [jsonOutput, setJsonOutput] = useState('');

  const handleFileChange = (event) => {
    const file = event.target.files[0];
    const reader = new FileReader();
    
    reader.onload = function(event) {
      setTextFile(event.target.result);
    };

    reader.readAsText(file);
  };

  const convertToJSON = () => {
    try {
      const lines = textFile.split('\n');
      const data = lines.map((line) => {
        const [key, value] = line.split(':');
        return { [key.trim()]: value.trim() };
      });

      setJsonOutput(JSON.stringify(data, null, 2));
    } catch (error) {
      console.error('Error converting file to JSON:', error);
    }
  };

  return (
    <div>
      <input type="file" onChange={handleFileChange} />
      <button onClick={convertToJSON}>Convert to JSON</button>
      <pre>{jsonOutput}</pre>
    </div>
  );
};

export default FileConverter;

import React from 'react';
import FileConverter from './FileConverter';

const App = () => {
  return (
    <div>
      <h1>.txt to JSON Converter</h1>
      <FileConverter />
    </div>
  );
};

export default App;

import React from 'react';
import ReactDOM from 'react-dom';
import App from './App';

ReactDOM.render(<App />, document.getElementById('root'));

npm start