React ts模式使用http-proxy-middleware代理时访问报404问题

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

module.exports = function(app) {
    app.use(
        createProxyMiddleware('/custom', {
            target: 'http://127.0.0.1:7001',
            changeOrigin: true, // needed for virtual hosted sites
            ws: true, // proxy websockets
            pathRewrite: {
                '^/custom': ''
            }
        })
    )
};

const proxy = require("http-proxy-middleware")
module.exprots = function (app) {
    app.use(
        proxy('/api1', {
            target: 'http://localhost:5000',  
            changeOrigin: true,  // 控制服务器收到的请求头host字段的值
            pathRewrite: { '^/api1': '' } // 路径重写
        })
    )
}

const { createProxyMiddleware } = require('http-proxy-middleware')
module.exports = function (app) {
    app.use('/api', createProxyMiddleware({
        target: 'http://localhost:3000',
        changeOrigin: true,
        pathRewrite: {
            "^/api": "/api"
        }
    }))
}