How to Write a Buffer as File in Node.js

Node.js's built-in Buffer is an important module when working with a file system.

Here is how to write a buffer as a file in Node.js

import fs from 'fs/promises';

const filePath = 'path/to/file'

const bufferData = Buffer.from('Hello World', 'utf8');


// Promise-based code
fs.writeFile(filePath, bufferData)
  .then(() => {
    console.log('Buffer has been written to file successfully');
  })
  .catch((err) => {
    console.error(err);
  });



// Alternatively, with async/await

try {
  await fs.writeFile(filePath, bufferData);
  console.log('Buffer has been written to file successfully');
} catch (err) {
  console.error(err);
}

Happy writing buffers!