process.env 返回未定义

Question

I've imported dotenv using require('dotenv').config(); at the top of the server.js file. The.env file is in root folder

 require('dotenv').config(); //import dotenv from 'dotenv'; // import express from 'express'; // import viewEngine from '../config/viewEngine'; // import initWebRoute from './routes/web'; // import bodyParser from 'body-parser'; var express = require("express"); var viewEngine = require("./config/viewEngine"); var initWebRoute = require("./routes/web"); var bodyParser = require("body-parser"); let app = express(); // config view engine viewEngine(app); //use body-parser to post data app.use(bodyParser.json()); app.use(bodyParser.urlencoded({ extended: true })); // init all web routes initWebRoute(app); let port = process.env.PORT; app.listen(port, ()=>{ console.log(`App is running at the port ${port}`); });

process.env returns 'undefined'. how can i fix this or is there an alternate way for importing environment file values

 PORT=8080 MY_VERIFY_FB_TOKEN=Randomstring FB_PAGE_TOKEN=pagetoken

Answer 1

Used your snippets and it's working fine. Try running npm i dotenv again to make sure you have the module installed and updated.

btw, body-parser is deprecated. You can use app.use(express.json()); instead.

Answer 2

FIXED the issue. It lacked a.env.example file