Using ES Modules

bookstore/package.json

@@ -1,6 +1,7 @@
 {
   "name": "@capire/bookstore",
   "version": "1.0.0",
+  "type": "module",
   "dependencies": {
     "@capire/bookshop": "*",
     "@capire/reviews": "*",

bookstore/server.js

@@ -1,7 +1,8 @@
-const cds = require ('@sap/cds')
+import mashup from './srv/mashup.js'
+import cds from '@sap/cds'
 
 // Add mashup logic
-cds.once('served', require('./srv/mashup'))
+cds.once('served', mashup)
 
 // Add routes to UIs from imported packages
 cds.once('bootstrap',(app)=>{
@@ -10,6 +11,3 @@ cds.once('bootstrap',(app)=>{
   app.serve ('/orders') .from('@capire/orders','app/orders')
   app.serve ('/data') .from('@capire/data-viewer','app/viewer')
 })
-
-// Add Swagger UI
-require('./srv/swagger-ui')

bookstore/srv/mashup.js

@@ -1,10 +1,11 @@
+import cds from '@sap/cds'
+
 ////////////////////////////////////////////////////////////////////////////
 //
 //    Mashing up bookshop services with required services...
 //
-module.exports = async()=>{ // called by server.js
+export default async()=>{ // called by server.js
 
-  const cds = require('@sap/cds')
   const CatalogService = await cds.connect.to ('CatalogService')
   const ReviewsService = await cds.connect.to ('ReviewsService')
   const OrdersService = await cds.connect.to ('OrdersService')

bookstore/srv/swagger-ui.js

@@ -1,10 +0,0 @@
-
-// -----------------------------------------------------------------------
-// Adding Swagger UI - see https://cap.cloud.sap/docs/advanced/openapi
-const cds = require ('@sap/cds')
-try {
-  const cds_swagger = require ('cds-swagger-ui-express')
-  cds.once ('bootstrap', app => app.use (cds_swagger()) )
-} catch (err) {
-  if (err.code !== 'MODULE_NOT_FOUND')  throw err
-}