const multiparty = require('multiparty'); const form = new multiparty.Form(); form.parse(req, function(err, fields, files) { if (err) { console.log(err); } else { console.log(fields, files); } });This code will parse a multipart form sent through the `req` object, and extract any fields and files uploaded in it. The `fields` and `files` arguments in the callback hold the parsed data. In this example, we are using the `multiparty` library, which is a popular npm package for parsing and handling multipart forms in Node.js.