如何为React App设置env变量? [英] How to setup the env variable for the react app?

问题描述

我的react应用程序在http://localhost:3000上运行，我想为不同的环境开发，生产，暂存和本地环境设置env变量.

My react app is running on http://localhost:3000 and I wanted to setup the env variable for the different environment development, production, staging and local.

我在不同环境下的应用URL是(我在嘲笑我的URL)

my react app url for different environment are(I am mocking my urls)

local = http://localhost:3000
development = http://react.developmet.com
production = http://react.production.com
stage = http://react.stage.com

寻找解决方案，如何为不同的环境设置环境变量.

looking for a solution how i can setup the env var for different environment.

将我的方法添加到刚刚想知道的这种方法的优缺点中.

Adding my approach to the same thing just wanted to know is this approach is good or not.

以及如何在暂存环境中实现相同目标

and how I can achieve same for staging environment

我已经创建了一个 environment.js 文件.

I have created an environment.js file.

let BASE_URL = http://localhost:3000

//check for environment
if (process.env.REACT_APP_ENV = "development") {
  BASE_URL = "http://react.developmet.com"
}
if (process.env.REACT_APP_ENV = "production") {
  BASE_URL = "http://react.production.com"
}

export {BASE_URL}

并更新了我的运行脚本

"scripts": {
     "dev":"REACT_APP_ENV=development npm start",
     "prod":"REACT_APP_ENV=productionnpm start",
     "build:dev":"REACT_APP_ENV=development npm run-script build",
     "build:prod":"REACT_APP_ENV=production npm run-script build",
    }

推荐答案

您可以使用 env-cmd 来管理多个 env 文件的构建:

You can use env-cmd to manage your build for multiple env files:

yarn add env-cmd -D

创建环境文件

1. 在根项目级别创建一个文件夹 envs
2. 创建 .env 文件(您需要的数量)

例如 envs/.env.dev ， envs/.env.prod ， envs/.env.staging 等

REACT_APP_API_HOST=http://my-prod-api.example.com
REACT_APP_ANY_OTHER_VAR=some_value

在package.json文件中配置脚本:

"scripts": {
    "start": "react-scripts start",
    "eject": "react-scripts eject",
    "dev": "env-cmd -f envs/.env.dev react-scripts build",
    "prod": "env-cmd -f envs/.env.prod react-scripts build",
    "staging": "env-cmd -f envs/.env.staging react-scripts build",
  },

进行构建:

$ yarn dev // to make build for dev env
$ yarn prod // to make build for prod env
$ yarn staging // to make build for staging env

PS:您也可以使用 npm 命令.我仅将 yarn 用于示例.

PS: You can use npm commands as well. I used yarn only for example purpose.

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