csv parser 2

gistfile1.txt

import React, { useState } from "react";
import Papa from "papaparse";
import { Table, Alert } from "react-bootstrap";

const allowedExtensions = ["csv"];

const App = () => {
  const [data, setData] = useState([]);
  const [error, setError] = useState("");
  const [file, setFile] = useState("");

  const handleFileChange = (e) => {
    setError("");
    if (e.target.files.length) {
      const inputFile = e.target.files[0];
      const fileExtension = inputFile?.name.split(".").pop();
      if (!allowedExtensions.includes(fileExtension)) {
        setError("Invalid file type. Please upload a CSV file.");
        return;
      }
      setFile(inputFile);
      const reader = new FileReader();
      reader.onload = () => {
        const csvData = reader.result;
        parseCSV(csvData);
      };
      reader.readAsText(inputFile);
    }
  };

  const parseCSV = (csvData) => {
    Papa.parse(csvData, {
      complete: (result) => {
        // result.data contains the parsed CSV data as an array
        setData(result.data);
      },
      error: (error) => {
        setError("Error parsing CSV file.");
        console.error(error);
      },
    });
  };

  return (
    <div>
      <input type="file" onChange={handleFileChange} />
      {error && <Alert variant="danger">{error}</Alert>}
      {data.length > 0 && (
        <Table striped bordered hover>
          <thead>
            <tr>
              {data[0].map((header, index) => (
                <th key={index}>{header}</th>
              ))}
            </tr>
          </thead>
          <tbody>
            {data.slice(1).map((row, rowIndex) => (
              <tr key={rowIndex}>
                {row.map((cell, cellIndex) => (
                  <td key={cellIndex}>{cell}</td>
                ))}
              </tr>
            ))}
          </tbody>
        </Table>
      )}
    </div>
  );
};

export default App;