node.js - 无法在 express js 中使用 .env 变量
问题描述
我是 node 新手,并且 express js 面临访问 .env 变量 webapp.js 的问题:
const express = require("express");
const app = express();
require('dotenv').config();
app.listen(process.env.app_port, () => {
//console.log("server running....", process.env);
console.log("server running....", process.env.app_port);
});
.env 文件:
node_env : development
app_port : 5000
db_port : 3306
host : localhost
user : root
password :
database : job_portal
connectionLimit : 10
包.json
{
"name": "webservices",
"version": "1.0.0",
"main": "webapp.js",
"scripts": {
"start": "nodemon webapp.js",
"dev": "nodemon webapp.js"
},
"keywords": [],
"author": "",
"license": "ISC",
"dependencies": {
"bcrypt": "^5.0.0",
"express": "^4.17.1",
"mysql": "^2.18.1"
},
"devDependencies": {
"cross-env": "^7.0.2",
"dotenv": "^8.2.0",
"nodemon": "^2.0.4"
},
"description": ""
}
我正在尝试从 .env 文件访问 webapp.js 中的变量,但它返回 undefined 如何解决这个问题?
解决方案
将 your.env 文件更改为
node_env = development
app_port = 5000
db_port = 3306
host = localhost
user = root