节点JS Express中的环境变量(.env) [英] Environment variables(.env) in node js express

问题描述

是否可以为所有不同的部署环境(例如开发，生产等)使用单个.env文件.根据环境，需要加载相应的环境变量文件.

Is it possible to have a single .env file for all different deployment environments such as development, production , etc.Based on the environment the corresponding environment variables file needs to be loaded.

推荐答案

是.您可以使用 dotenv module 例如:

Yes. You can use the dotenv module for example:

.env

DB_HOST=localhost
DB_USER=root
DB_PASS=s1mpl3

app.js

require('dotenv').config()

const db = require('db')
db.connect({
  host: process.env.DB_HOST,
  username: process.env.DB_USER,
  password: process.env.DB_PASS
}

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