Js中有session不

// 服务器端（Node.js + Express）
const express = require('express');
const session = require('express-session');

const app = express();

app.use(session({
  secret: 'your_secret_key',
  resave: false,
  saveUninitialized: true
}));

app.get('/setSession', (req, res) => {
  req.session.user = { name: 'John Doe' };
  res.send('Session set');
});

app.get('/getSession', (req, res) => {
  res.send(`User in session: ${JSON.stringify(req.session.user)}`);
});

app.listen(3000, () => console.log('Server running on port 3000'));

// 客户端（JavaScript）
function setSession() {
  fetch('/setSession')
    .then(response => response.text())
    .then(data => console.log(data));
}

function getSession() {
  fetch('/getSession')
    .then(response => response.json())
    .then(data => console.log(data));
}