如何使用nodejs存储URL txt文件的第一行

const fs = require('fs');
const readline = require('readline');

const rl = readline.createInterface({
  input: fs.createReadStream('urls.txt'),
  output: process.stdout,
  terminal: false
});

let firstLine = '';

rl.on('line', (line) => {
  firstLine = line;
  rl.close();
});

rl.on('close', () => {
  fs.writeFile('storedUrl.txt', firstLine, (err) => {
    if (err) throw err;
    console.log('URL已成功存储到storedUrl.txt文件中。');
  });
});

const fs = require('fs');
const readline = require('readline');

const rl = readline.createInterface({
  input: fs.createReadStream('urls.txt'),
  output: process.stdout,
  terminal: false
});

let firstLine = '';

rl.on('line', (line) => {
  firstLine = line;
  rl.close();
});

rl.on('close', () => {
  fs.writeFile('storedUrl.txt', firstLine, (err) => {
    if (err) throw err;
    console.log('URL已成功存储到storedUrl.txt文件中。');
  });
});