Writing Data to a File

If your application needs to store small pieces of information that seldom need to be read or written, using text files is a quick, lightweight option. Node.js has a rich File System module that allows you to interact with the filesystem however you need to. Writing data to a file looks like Listing 8.1.

Listing 8.1. Writing Data to a File

---

var fs = require('fs'),
    data = "Some data I want to write to a file";
fs.writeFile('file.txt', data, function (err) {
  if (!err) {
    console.log('Wrote data to file.txt');
  } else {
    throw err;
  }
});

---

The File System module is required on the first line and then a variable is set to hold the data that should be written to the file. The writeFile method is then used to write the data to a file.