Express.js application bug: Cannot read property 'transfer-encoding' of undefined

Question

I am working on a blogging application (click the link to see the GitHub repo) with Express, EJS and MongoDB.

I am trying to introduce

Answer 1

You are missing req and res inside your upload(), try adding those two like upload(req,res, function (err){

upload(req, res, function (err) {
        if (err) {
            console.log("There was an error uploading the image.");
        }
        res.json({
            success: true,
            message: 'Image uploaded!'
        });
    })