react 跨域

// setupProxy.js 
//yarn add http-proxy-middleware
const { createProxyMiddleware } = require('http-proxy-middleware')

 
module.exports = function(app) {
    app.use(
        createProxyMiddleware('/v3', { //`api`是需要转发的请求 
            target: 'https://mallcdn.api.epet.com', // 这里是接口服务器地址，我乱填的
            changeOrigin: true,
        })
    )
}