在NodeJS中向现有用户插入数据的MongoDB

const MongoClient = require('mongodb').MongoClient;
const url = 'mongodb://localhost:27017'; // MongoDB连接URL
const dbName = 'mydatabase'; // 数据库名称

MongoClient.connect(url, function(err, client) {
  if (err) throw err;

  const db = client.db(dbName);

  // 在此处执行插入数据的操作
});

const user = {
  name: 'John',
  age: 25,
  email: 'john@example.com'
};

db.collection('users').insertOne(user, function(err, res) {
  if (err) throw err;
  
  console.log('New user inserted:', res.insertedId);
  client.close();
});