将Javascript变量插入flask应用程序，然后将其插入Mysql数据库

document.getElementById('submit-btn').addEventListener('click', function() {
    var name = document.getElementById('name').value;
    var email = document.getElementById('email').value;

    fetch('/submit', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json'
        },
        body: JSON.stringify({ name: name, email: email })
    })
    .then(response => response.json())
    .then(data => {
        console.log('Success:', data);
    })
    .catch((error) => {
        console.error('Error:', error);
    });
});

from flask import Flask, request, jsonify
import mysql.connector

app = Flask(__name__)

@app.route('/submit', methods=['POST'])
def submit():
    data = request.get_json()
    name = data['name']
    email = data['email']

    conn = mysql.connector.connect(
        host='localhost',
        user='your_username',
        password='your_password',
        database='your_database'
    )
    cursor = conn.cursor()
    query = "INSERT INTO users (name, email) VALUES (%s, %s)"
    cursor.execute(query, (name, email))
    conn.commit()
    cursor.close()
    conn.close()

    return jsonify({'message': 'User added successfully'})

if __name__ == '__main__':
    app.run(debug=True)

from flask_cors import CORS

app = Flask(__name__)
CORS(app)