formidable npm UnhandledPromiseRejectionWarning code example

Example: formidable form node js

const http = require('http');const formidable = require('formidable'); const server = http.createServer((req, res) => {  if (req.url === '/api/upload' && req.method.toLowerCase() === 'post') {    // parse a file upload    const form = formidable({ multiples: true });     form.parse(req, (err, fields, files) => {      res.writeHead(200, { 'content-type': 'application/json' });      res.end(JSON.stringify({ fields, files }, null, 2));    });     return;  }   // show a file upload form  res.writeHead(200, { 'content-type': 'text/html' });  res.end(`    <h2>With Node.js <code>"http"</code> module</h2>    <form action="/api/upload" enctype="multipart/form-data" method="post">      <div>Text field title: <input type="text" name="title" /></div>      <div>File: <input type="file" name="multipleFiles" multiple="multiple" /></div>      <input type="submit" value="Upload" />    </form>  `);}); server.listen(8080, () => {  console.log('Server listening on http://localhost:8080/ ...');});