單獨(dú)放入文件夾的話，如果你使用了app.use你還是需要在你的api文件夾里面聲明app

在原本的js用export 把a(bǔ)pp export出去，在新的js用require 提取取來

推薦使用對(duì)應(yīng)的route

// invoked for any requests passed to this router
router.use(function(req, res, next) {
  // .. some logic here .. like any other middleware
  next();
});

// will handle any request that ends in /events
// depends on where the router is "use()'d"
router.get('/events', function(req, res, next) {
  // ..
});

請(qǐng)用router