Configuring logging with all of the available interfaces

Sequelize offers a few overload signatures for incorporating logs into an application. The default behavior is to call console.log for each query. The following is a list of signatures that Sequelize will abide by:

• function (msg) {}
• function (...msg) {}
• true/false
• msg => someLogger.debug(msg)
• someLogger.debug.bind(someLogger)

If we wanted to customize Sequelize’s logging behavior, the following example would be a quick introduction to how to do so:

function customLog(msg) {
    // insert into db/logger app here
    // ...
    // and output to stdout
    console.log(msg);
}
const sequelize = new Sequelize('sqlite::memory:', {
    logging: customLog
});

In addition to Sequelize sending the SQL queries into our customLog function, we are also given a helper method for when we...