March 4, 2022 . 1 MIN READ
For occasional appends, you can use appendFile, which creates a new file handle each time it’s called:
Asynchronously:
const fs = require(‘fs’);
fs.appendFile(‘message.txt’, ‘data to append’, function (err) {
if (err) throw err;
console.log(‘Saved!’);
});
Synchronously:
const fs = require(‘fs’);
fs.appendFileSync(‘message.txt’, ‘data to append’);
Reference: https://stackoverflow.com/questions/3459476/how-to-append-to-a-file-in-node#:~:text=If%20you%20want%20to%20append,%3A’a’%7D)%3B%20console.
