Why does Infinite Load appear with such a search for positions in MongoDB?

Question

MongoDB

Hello.
This option works. When I request the url, the data is immediately returned to me:

ShopSchema.find(function (err, data) {
        if (err) {
            console.log(err);
        }
        else {
            res.json(data);
        }
    });

And with this, the site just loads endlessly:

ShopSchema.find((data, err) => {
        if (err) {
            console.log("--- ", err);
        } else {
            return res.json(data)
        }
    });

Why?
Thank you.

Answer 1

You have err and data mixed up in the second option.