JS MySQL封裝是指通過JavaScript封裝MySQL的API，實(shí)現(xiàn)對MySQL數(shù)據(jù)庫的操作。這是一種實(shí)現(xiàn)數(shù)據(jù)庫連接的方式，它能夠在JavaScript應(yīng)用程序中通過MySQL庫對象提供的方法向數(shù)據(jù)庫發(fā)送請求，進(jìn)行數(shù)據(jù)的讀寫操作。

//連接MySQL數(shù)據(jù)庫
const mysql = require('mysql');
const connection = mysql.createConnection({
host: 'localhost',
user: 'root',
password: 'password',
database: 'mydb'
});
//查詢數(shù)據(jù)
connection.query('SELECT * FROM users', function(error, results, fields) {
if (error) throw error;
console.log('The solution is: ', results);
});
//插入數(shù)據(jù)
const user = {name: 'Tom', age: 25};
connection.query('INSERT INTO users SET ?', user, function (error, results, fields) {
if (error) throw error;
console.log('User added to database');
});
//更新數(shù)據(jù)
connection.query(
'UPDATE users SET age = ? Where name = ?',
[30, 'Tom'],
function (error, results, fields) {
if (error) throw error;
console.log('User updated in database');
}
);
//關(guān)閉連接
connection.end();

封裝MySQL API的好處是可以把數(shù)據(jù)庫操作封裝成函數(shù)調(diào)用，方便了開發(fā)者進(jìn)行代碼復(fù)用，提高了代碼的可讀性和可維護(hù)性。此外，對于大型的項(xiàng)目，這種封裝還能提高代碼的靈活性和可擴(kuò)展性，使得開發(fā)過程更加高效。