如何使用node / express正确地为Angular 6/7应用程序提供服务？

npm init

npm install express body-parser --save

const express = require('express');
const bodyParser = require('body-parser');

const app = express();
const port = 3000;

// 解析请求体中的JSON数据
app.use(bodyParser.json());

// 处理GET请求
app.get('/', (req, res) => {
  res.send('Hello World!');
});

// 处理POST请求
app.post('/api/data', (req, res) => {
  const data = req.body;
  // 处理数据并返回响应
  res.json({ message: 'Data received', data });
});

// 启动服务器
app.listen(port, () => {
  console.log(`Server running on port ${port}`);
});

node server.js

import { HttpClient } from '@angular/common/http';

// ...

constructor(private http: HttpClient) {}

postData(data: any) {
  const url = '/api/data'; // 服务器的URL
  this.http.post(url, data).subscribe(response => {
    console.log(response);
  });
}