const os = require('os');

const fs = require('fs');

​

// Get the OS-specific end-of-line marker

console.log(`End-of-Line Marker: ${JSON.stringify(os.EOL)}`);

// Windows: \r\n

// POSIX: \n

​

// Using EOL when writing to a file

fs.writeFileSync('example.txt', 

  `Line 1${os.EOL}Line 2${os.EOL}Line 3${os.EOL}`,

  'utf8'

);

​

console.log('Created file with OS-specific line endings');

​