Fix "Unexpected field" Error From Multer

You set out to implement file uploads in Node.js, only to get blocked by this particular error:

MulterError: Unexpected field

What does this cryptic message even mean?!

By now you've already spent several hours trying to solve this problem. Why does implementing a simple file upload feature have to be so hard?!

It doesn't have to be this way though. Writing an endpoint that accepts, parses and uploads a file in Node.js can be straightforward.

After reading this article, you'll turn an annoying error into something you'll solve in less than 5 minutes!

Read on or if you prefer video, watch it below.