Querystring netlify form playground deprecated?

I am trying to make a form work. This is my code: I copied it from here:https://functions.netlify.com/playground/#hello%2C-%7Bname%7D-(post-version)

const handler = async (event, context) => {
  // Only allow POST
  if (event.httpMethod !== "POST") {
    return { statusCode: 405, body: "Method Not Allowed" };

  // When the method is POST, the name will no longer be in the event’s
  // queryStringParameters – it’ll be in the event body encoded as a query string
  const params = querystring.parse(event.body);

  const { firstname, lastname, country } = params;

  // maak er een object van dat de data terugstuurt naar de user
  const userData = {


  return {
    statusCode: 200,
    body: JSON.stringify(userData),
module.exports = {handler};

The code comes up in vscode like this: https://i.stack.imgur.com/lhX7G.png
The querystring seems deprecated but I can’t seem to get it to work with URLSearchParams. Can somebody help me out?

Hey @Woep,

You can simply use event.queryStringParameters and access the params from there.