为什么我不能在localhost：3000上查看我的Express应用程序

Question

I am trying to run an express app and view the res.send message on localhost:3000 as instructed in the course I am viewing. app.js

 let express = require("express"); let app = express(); app.get("/",function(req,res){ res.send("Hello World"); }); app.listen(3000,function(){ console.log("listening on port 3000"); }); 

And then in the terminal I type node app.js to run the file. app.listen works just fine displaying the "listening on port 3000" message on the terminal. I then go to my browser and try http://localhost:3000 and nothing loads, tried just localhost:3000 and again nothing loads. I have no idea why this is happening at all, could someone please help me.

Answer 1

You created local server, you will see the text if for example send get request via PostMan etc.

or another way it sends html file to client, you'll see it immediately, more details here

Answer 2

I have tried your code in my system and it works! I think the issue may be with your browser, try it in a different browser or in a private mode. If the issue persists you could try it in a different port. Also make sure that you are running the latest versions of Node and Express.

Resources: MDN EJS