not working with lambda function

Hello i am trying to use node-formidable with aws serverless lambda function but it is giving me ERROR -

req.on is not a function

MY CODE IS ;

var formidable = require("formidable");
  const util = require("util");
export async function upload(event, context, callback) {
 context.callbackWaitsForEmptyEventLoop = false;
  var form = new formidable.IncomingForm();
 form.parse(event, function(err, fields, files) {
    let response = util.inspect({ fields: fields, files: files });
    console.log(response);
  });

cc @felixge

[muttoni]

Maybe I can help clarify: Lambda/Azure functions receive the raw JSON response without any lifecycle hooks. So in case of multipart/form data the JSON is there ready to parse (with boundaries and/or raw file contents which are usually not base64encoded if multipart but they usually are if it’s a file upload). Does this help?

[manishjha1991]

I am using AWS Serverless and event is just like req in express framework .