I’ve mariadb installed on my VDS with Centos 7.
I’ve installed mysql npm package:

npm i mysql

Yet requesting that package with

var mysql = require('mysql');

has not provided to the successful connection.
While

var mysql = require('mariadb');

has done.

var mysql = require('mariadb');

var con = mysql.createConnection({
  host: "localhost",
  user: "admin_default",
  password: "xxxxxx",
  database: 'admin_default'
}).then(function (){
   console.log('connected!');
}, function(err){
   console.log(err);
});
//console.log(con);