require('dotenv').config();

const express = require('express');
const app = express();
const cors = require('cors');

app.use(cors);

const connectDB = require('./config/mongoDB');

const PORT = process.env.PORT || 8000;

// body parser
app.use(express.json({ extended: false }));

//router
app.use(
  '/',
  require('./routes/index')
);

app.listen(PORT, (req, res) => {
  connectDB();
  console.log('listening on port '   PORT);
});

so this is my express server code, it was working yesterday but I can't reach localhost: PORT (via postman and browser) today but it is running and listening to PORT. Where it goes wrong?

CodePudding user response：

1. The cors middleware should be called with parenthesis, as a function:

app.use(cors());

2. You are setting the body parser middleware incorrectly, change

app.use(express.json({ extended: false }));

to:

app.use(express.json());
app.use(express.urlencoded({ extended: true }));