vercel · timneutkens · Aug 10, 2017 · Aug 10, 2017
diff --git a/examples/custom-server-express/server.js b/examples/custom-server-express/server.js
@@ -1,6 +1,7 @@
 const express = require('express')
 const next = require('next')
 
+const port = parseInt(process.env.PORT, 10) || 3000
 const dev = process.env.NODE_ENV !== 'production'
 const app = next({ dev })
 const handle = app.getRequestHandler()
@@ -21,8 +22,8 @@ app.prepare()
     return handle(req, res)
   })
 
-  server.listen(3000, (err) => {
+  server.listen(port, (err) => {
     if (err) throw err
-    console.log('> Ready on http://localhost:3000')
+    console.log(`> Ready on http://localhost:${port}`)
   })
 })
diff --git a/examples/custom-server-hapi/server.js b/examples/custom-server-hapi/server.js
@@ -3,6 +3,7 @@ const Hapi = require('hapi')
 const Good = require('good')
 const { pathWrapper, defaultHandlerWrapper } = require('./next-wrapper')
 
+const port = parseInt(process.env.PORT, 10) || 3000
 const dev = process.env.NODE_ENV !== 'production'
 const app = next({ dev })
 const server = new Hapi.Server()
@@ -23,7 +24,7 @@ const pluginOptions = [
 
 app.prepare()
 .then(() => {
-  server.connection({ port: 3000 })
+  server.connection({ port })
   server.register(pluginOptions)
   .then(() => {
     server.route({
@@ -48,7 +49,7 @@ app.prepare()
       console.log('Error starting server')
       console.log(error)
     }).then(() => {
-      console.log('> Ready on http://localhost:3000')
+      console.log(`> Ready on http://localhost:${port}`)
     })
   })
 })
diff --git a/examples/custom-server-koa/server.js b/examples/custom-server-koa/server.js
@@ -2,6 +2,7 @@ const Koa = require('koa')
 const next = require('next')
 const Router = require('koa-router')
 
+const port = parseInt(process.env.PORT, 10) || 3000
 const dev = process.env.NODE_ENV !== 'production'
 const app = next({ dev })
 const handle = app.getRequestHandler()
@@ -32,8 +33,8 @@ app.prepare()
   })
 
   server.use(router.routes())
-  server.listen(3000, (err) => {
+  server.listen(port, (err) => {
     if (err) throw err
-    console.log('> Ready on http://localhost:3000')
+    console.log(`> Ready on http://localhost:${port}`)
   })
 })
diff --git a/examples/custom-server-micro/server.js b/examples/custom-server-micro/server.js
@@ -3,6 +3,7 @@ const match = require('micro-route/match')
 const { parse } = require('url')
 const next = require('next')
 
+const port = parseInt(process.env.PORT, 10) || 3000
 const dev = process.env.NODE_ENV !== 'production'
 const app = next({ dev })
 const handle = app.getRequestHandler()
@@ -21,8 +22,8 @@ const server = micro(async (req, res) => {
 })
 
 app.prepare().then(() => {
-  server.listen(3000, err => {
+  server.listen(port, err => {
     if (err) throw err
-    console.log('> Ready on http://localhost:3000')
+    console.log(`> Ready on http://localhost:${port}`)
   })
 })
diff --git a/examples/custom-server/server.js b/examples/custom-server/server.js
@@ -2,6 +2,7 @@ const { createServer } = require('http')
 const { parse } = require('url')
 const next = require('next')
 
+const port = parseInt(process.env.PORT, 10) || 3000
 const dev = process.env.NODE_ENV !== 'production'
 const app = next({ dev })
 const handle = app.getRequestHandler()
@@ -20,8 +21,8 @@ app.prepare()
       handle(req, res, parsedUrl)
     }
   })
-  .listen(3000, (err) => {
+  .listen(port, (err) => {
     if (err) throw err
-    console.log('> Ready on http://localhost:3000')
+    console.log(`> Ready on http://localhost:${port}`)
   })
 })
diff --git a/examples/page-transitions/server.js b/examples/page-transitions/server.js
@@ -3,7 +3,7 @@ const routes = require('./routes')
 const express = require('express')
 const compression = require('compression')
 
-const port = process.env.PORT || 3000
+const port = parseInt(process.env.PORT, 10) || 3000
 const dev = process.env.NODE_ENV !== 'production'
 
 const app = next({ dev })

diff --git a/examples/parameterized-routing/server.js b/examples/parameterized-routing/server.js
@@ -3,6 +3,7 @@ const { parse } = require('url')
 const next = require('next')
 const pathMatch = require('path-match')
 
+const port = parseInt(process.env.PORT, 10) || 3000
 const dev = process.env.NODE_ENV !== 'production'
 const app = next({ dev })
 const handle = app.getRequestHandler()
@@ -23,8 +24,8 @@ app.prepare()
     // i.e. /blog/foo?show-comments=true
     app.render(req, res, '/blog', Object.assign(params, query))
   })
-  .listen(3000, (err) => {
+  .listen(port, (err) => {
     if (err) throw err
-    console.log('> Ready on http://localhost:3000')
+    console.log(`> Ready on http://localhost:${port}`)
   })
 })
diff --git a/examples/root-static-files/server.js b/examples/root-static-files/server.js
@@ -3,6 +3,7 @@ const { parse } = require('url')
 const next = require('next')
 const { join } = require('path')
 
+const port = parseInt(process.env.PORT, 10) || 3000
 const dev = process.env.NODE_ENV !== 'production'
 const app = next({ dev })
 const handle = app.getRequestHandler()
@@ -23,8 +24,8 @@ app.prepare()
       handle(req, res, parsedUrl)
     }
   })
-  .listen(3000, (err) => {
+  .listen(port, (err) => {
     if (err) throw err
-    console.log('> Ready on http://localhost:3000')
+    console.log(`> Ready on http://localhost:${port}`)
   })
 })
diff --git a/examples/ssr-caching/server.js b/examples/ssr-caching/server.js
@@ -2,6 +2,7 @@ const express = require('express')
 const next = require('next')
 const LRUCache = require('lru-cache')
 
+const port = parseInt(process.env.PORT, 10) || 3000
 const dev = process.env.NODE_ENV !== 'production'
 const app = next({ dir: '.', dev })
 const handle = app.getRequestHandler()
@@ -30,9 +31,9 @@ app.prepare()
     return handle(req, res)
   })
 
-  server.listen(3000, (err) => {
+  server.listen(port, (err) => {
     if (err) throw err
-    console.log('> Ready on http://localhost:3000')
+    console.log(`> Ready on http://localhost:${port}`)
   })
 })
 

diff --git a/examples/using-inferno/server.js b/examples/using-inferno/server.js
@@ -1,3 +1,4 @@
+const port = parseInt(process.env.PORT, 10) || 3000
 const dev = process.env.NODE_ENV !== 'production'
 const moduleAlias = require('module-alias')
 
@@ -22,8 +23,8 @@ app.prepare()
     const parsedUrl = parse(req.url, true)
     handle(req, res, parsedUrl)
   })
-  .listen(3000, (err) => {
+  .listen(port, (err) => {
     if (err) throw err
-    console.log('> Ready on http://localhost:3000')
+    console.log(`> Ready on http://localhost:${port}`)
   })
 })
diff --git a/examples/using-preact/server.js b/examples/using-preact/server.js
@@ -1,3 +1,4 @@
+const port = parseInt(process.env.PORT, 10) || 3000
 const dev = process.env.NODE_ENV !== 'production'
 const moduleAlias = require('module-alias')
 
@@ -21,8 +22,8 @@ app.prepare()
     const parsedUrl = parse(req.url, true)
     handle(req, res, parsedUrl)
   })
-  .listen(3000, (err) => {
+  .listen(port, (err) => {
     if (err) throw err
-    console.log('> Ready on http://localhost:3000')
+    console.log(`> Ready on http://localhost:${port}`)
   })
 })
diff --git a/examples/with-custom-reverse-proxy/server.es6.js b/examples/with-custom-reverse-proxy/server.es6.js
@@ -10,7 +10,7 @@ const devProxy = {
   }
 }
 
-const port = process.env.PORT || 3000
+const port = parseInt(process.env.PORT, 10) || 3000
 const env = process.env.NODE_ENV
 const dev = env !== 'production'
 const app = next({

diff --git a/examples/with-firebase-authentication/server.js b/examples/with-firebase-authentication/server.js
@@ -5,6 +5,7 @@ const FileStore = require('session-file-store')(session)
 const next = require('next')
 const admin = require('firebase-admin')
 
+const port = parseInt(process.env.PORT, 10) || 3000
 const dev = process.env.NODE_ENV !== 'production'
 const app = next({ dev })
 const handle = app.getRequestHandler()
@@ -56,8 +57,8 @@ app.prepare()
     return handle(req, res)
   })
 
-  server.listen(3000, (err) => {
+  server.listen(port, (err) => {
     if (err) throw err
-    console.log('> Ready on http://localhost:3000')
+    console.log(`> Ready on http://localhost:${port}`)
   })
 })
diff --git a/examples/with-mobx/server.js b/examples/with-mobx/server.js
@@ -1,3 +1,4 @@
+const port = parseInt(process.env.PORT, 10) || 3000
 const dev = process.env.NODE_ENV !== 'production'
 
 const { createServer } = require('http')
@@ -13,8 +14,8 @@ app.prepare().then(() => {
   createServer((req, res) => {
     const parsedUrl = parse(req.url, true)
     handle(req, res, parsedUrl)
-  }).listen(3000, err => {
+  }).listen(port, err => {
     if (err) throw err
-    console.log('> Ready on http://localhost:3000')
+    console.log(`> Ready on http://localhost:${port}`)
   })
 })
diff --git a/examples/with-next-routes/server.js b/examples/with-next-routes/server.js
@@ -2,15 +2,16 @@ const { createServer } = require('http')
 const next = require('next')
 const routes = require('./routes')
 
+const port = parseInt(process.env.PORT, 10) || 3000
 const dev = process.env.NODE_ENV !== 'production'
 const app = next({ dev })
 const handler = routes.getRequestHandler(app)
 
 app.prepare()
 .then(() => {
   createServer(handler)
-  .listen(3000, (err) => {
+  .listen(port, (err) => {
     if (err) throw err
-    console.log('> Ready on http://localhost:3000')
+    console.log(`> Ready on http://localhost:${port}`)
   })
 })
diff --git a/examples/with-pkg/server.js b/examples/with-pkg/server.js
@@ -2,15 +2,16 @@ const { createServer } = require('http')
 const { parse } = require('url')
 const next = require('next')
 
+const port = parseInt(process.env.PORT, 10) || 3000
 const dev = process.env.NODE_ENV !== 'production'
 const app = next({ dev })
 const handle = app.getRequestHandler()
 
 app.prepare()
 .then(() => {
   createServer((req, res) => handle(req, res, parse(req.url, true).pathname))
-  .listen(3000, (err) => {
+  .listen(port, (err) => {
     if (err) throw err
-    console.log('> Ready on http://localhost:3000')
+    console.log(`> Ready on http://localhost:${port}`)
   })
 })
diff --git a/examples/with-pretty-url-routing/server.js b/examples/with-pretty-url-routing/server.js
@@ -2,9 +2,9 @@ const express = require('express')
 const next = require('next')
 const Router = require('./routes').Router
 
-const dev = process.env.NODE_ENV !== 'production'
 const port = parseInt(process.env.PORT, 10) || 3000
-const app = next({dev})
+const dev = process.env.NODE_ENV !== 'production'
+const app = next({ dev })
 const handle = app.getRequestHandler()
 
 app.prepare()

diff --git a/examples/with-react-i18next/server.js b/examples/with-react-i18next/server.js
@@ -2,6 +2,7 @@ const express = require('express')
 const path = require('path')
 const next = require('next')
 
+const port = parseInt(process.env.PORT, 10) || 3000
 const dev = process.env.NODE_ENV !== 'production'
 const app = next({ dev })
 const handle = app.getRequestHandler()
@@ -40,9 +41,9 @@ i18n
         // use next.js
         server.get('*', (req, res) => handle(req, res))
 
-        server.listen(3000, (err) => {
+        server.listen(port, (err) => {
           if (err) throw err
-          console.log('> Ready on http://localhost:3000')
+          console.log(`> Ready on http://localhost:${port}`)
         })
       })
   })
diff --git a/examples/with-react-intl/server.js b/examples/with-react-intl/server.js
@@ -11,6 +11,7 @@ const accepts = require('accepts')
 const glob = require('glob')
 const next = require('next')
 
+const port = parseInt(process.env.PORT, 10) || 3000
 const dev = process.env.NODE_ENV !== 'production'
 const app = next({dev})
 const handle = app.getRequestHandler()
@@ -46,8 +47,8 @@ app.prepare().then(() => {
     req.localeDataScript = getLocaleDataScript(locale)
     req.messages = dev ? {} : getMessages(locale)
     handle(req, res)
-  }).listen(3000, (err) => {
+  }).listen(port, (err) => {
     if (err) throw err
-    console.log('> Read on http://localhost:3000')
+    console.log(`> Ready on http://localhost:${port}`)
   })
 })
diff --git a/examples/with-socket.io/server.js b/examples/with-socket.io/server.js
@@ -3,6 +3,7 @@ const server = require('http').Server(app)
 const io = require('socket.io')(server)
 const next = require('next')
 
+const port = parseInt(process.env.PORT, 10) || 3000
 const dev = process.env.NODE_ENV !== 'production'
 const nextApp = next({ dev })
 const nextHandler = nextApp.getRequestHandler()
@@ -27,8 +28,8 @@ nextApp.prepare().then(() => {
     return nextHandler(req, res)
   })
 
-  server.listen(3000, (err) => {
+  server.listen(port, (err) => {
     if (err) throw err
-    console.log('> Ready on http://localhost:3000')
+    console.log(`> Ready on http://localhost:${port}`)
   })
 })
diff --git a/examples/with-static-export/server.js b/examples/with-static-export/server.js
@@ -1,6 +1,7 @@
 const express = require('express')
 const next = require('next')
 
+const port = parseInt(process.env.PORT, 10) || 3000
 const dev = process.env.NODE_ENV !== 'production'
 const app = next({ dev })
 const handle = app.getRequestHandler()
@@ -20,8 +21,8 @@ app.prepare()
     return handle(req, res)
   })
 
-  server.listen(3000, (err) => {
+  server.listen(port, (err) => {
     if (err) throw err
-    console.log('> Ready on http://localhost:3000')
+    console.log(`> Ready on http://localhost:${port}`)
   })
 })
diff --git a/examples/with-sw-precache/server.js b/examples/with-sw-precache/server.js
@@ -3,6 +3,7 @@ const { join } = require('path')
 const { parse } = require('url')
 const next = require('next')
 
+const port = parseInt(process.env.PORT, 10) || 3000
 const dev = process.env.NODE_ENV !== 'production'
 const app = next({ dev })
 const handle = app.getRequestHandler()
@@ -20,8 +21,8 @@ app.prepare()
       handle(req, res, parsedUrl)
     }
   })
-  .listen(3000, (err) => {
+  .listen(port, (err) => {
     if (err) throw err
-    console.log('> Ready on http://localhost:3000')
+    console.log(`> Ready on http://localhost:${port}`)
   })
 })