Why is data not sent from the server to the client via post?

Question

MySQL

The post request contains a query to the database

let data = pool.query("SELECT * FROM users");
res.send(data);

At the same time, in the console, for some reason, it displays a selection of all the data from the table, although the console.log on the server is not in the post, and nothing comes to the client, only emptiness.

Answer 1

Accessing the database in NodeJS is asynchronous and sending the result should be in callback:

pool.query("SELECT * FROM users", (err, result)=>{
    if (err) throw new Error(err.message);

    res.send(result);
});