What is dotenv and how to use it

using dotenv

npm's official documentation introduces dotenv like this: Dotenv is a zero-dependency module that loads variables in environment variables from a .env file into process.env.

use

1. Install dotenv in the project

npm install dotenv

1. Create a .env file in the root directory

HOST=localhost
PORT=3000

1. Introduce dotenv under index.js in the root directory and use

require('dotenv').config({ path: '.env' })

// 使用
console.log(process.env.HOST) // localhost
console.log(process.env.PORT) // 3000

Using dotenv can save us from introducing configuration files in each file, and can also solve the leakage of sensitive information very well, which is conducive to post-code maintenance. Use it quickly!

Author: Front-end Xiaobai's digging and rolling
link: https://www.jianshu.com/p/16fa200234e9
Source: Jianshu
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