js访问本地json跨域

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

app.use((req, res, next) => {
  res.header('Access-Control-Allow-Origin', '*'); // 允许所有源
  res.header('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept');
  next();
});

app.get('/data.json', (req, res) => {
  res.json({ message: 'This is data from the server' });
});

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

const express = require('express');
const { createProxyMiddleware } = require('http-proxy-middleware');

const app = express();

app.use('/api', createProxyMiddleware({ 
  target: 'http://localhost:3000', // 目标服务器
  changeOrigin: true,
}));

app.listen(8080, () => console.log('Proxy server running on port 8080'));

fetch('/api/data.json')
  .then(response => response.json())
  .then(data => console.log(data));