1 config

js
https://www.npmjs.com/package/config




支持yml格式，需要下载 npm install js-yaml -S
$ npm install config
$ mkdir config
$ vi config/default.json


{
  // Customer module configs
  "Customer": {
    "dbConfig": {
      "host": "localhost",
      "port": 5984,
      "dbName": "customers"
    },
    "credit": {
      "initialLimit": 100,
      // Set low for development
      "initialDays": 1
    }
  }
}

//使用
cross-env指定配置环境
npm install cross-env --save 
const config = require('config');
package.json 中配置
"scripts": {
    "prod": "cross-env NODE_ENV= production", //会使用production中的配置，合并default中的配置
  },

2 dotenv

js
https://www.npmjs.com/package/dotenv

npm install dotenv cross-env --save

创建.env文件
require('dotenv').config()
console.log(process.env) // remove this after you've confirmed it is working