从js提示发送数据到expressjs js路由

const data = {
  name: 'John',
  age: 25
};

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

const express = require('express');
const app = express();

app.use(express.json());

app.post('/api/data', (req, res) => {
  const receivedData = req.body;
  // 处理接收到的数据
  // ...

  // 返回响应
  res.json({ message: 'Data received successfully' });
});

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