JAVASCRIPT

node mysql

const mysql = require("mysql");

const db = mysql.createConnection({
	host: "localhost",
	user: "root",
	password: "",
	database: "dbname",
	charset: "utf8mb4_bin"
});

db.connect(err => {
	if(err) throw err;
});

module.exports = db;

mysql node

const mysql = require("mysql");
const mysqlDb = mysql.createConnection({
	host: process.env.mysql_HOST || "localhost",
	user: process.env.mysql_USER || "root",
	password: process.env.mysql_PASSWORD || "",
	database: process.env.mysql_DATABSE || "my_db"
});

mysqlDb.connect(err => {
	if(err) throw err;
});

module.exports = mysqlDb;

node mysql

git clone https://github.com/LloydJanseVanRensburg/Node-Express-starter.git

nodejs mysql

// you can't connect to mysql in client side js

// but you can use it in nodejs which is server-side
// for nodejs you can use package named mysql2
npm i mysql2

// read Doc here 
// https://www.npmjs.com/package/mysql2