React Native：process.env只有NODE_ENV

I'm setting an environment variable while building my react-native app (on windows):

我正在构建一个环境变量，同时构建我的react-native应用程序（在Windows上）：

SET APP_ENV=dev & react-native run-android

echo %APP_ENV% returns 'dev'

echo％APP_ENV％返回'dev'

But when I log process.env object in my JS file, I only get:

但是当我在我的JS文件中记录process.env对象时，我只得到：

{
  NODE_ENV: "development"
}

Is there a different way to access environment variables set through command prompt?

是否有不同的方法来访问通过命令提示符设置的环境变量？

1 个解决方案

#1

It's important to know that the React-Native app is running on a device (or emulator) in an environment more like a browser, not a Node.js process.

重要的是要知道React-Native应用程序在更像浏览器的环境中的设备（或模拟器）上运行，而不是Node.js进程。

For cross-compatibility with Node.js libraries that relies on process.env.NODE_ENV to perform optimizations, React-Native adds the process global variable with env.NODE_ENV.

为了与依赖于process.env.NODE_ENV执行优化的Node.js库的交叉兼容性，React-Native使用env.NODE_ENV添加进程全局变量。

If you want to pass custom constants to React-Native, you can use: https://github.com/luggit/react-native-config

如果要将自定义常量传递给React-Native，可以使用：https：//github.com/luggit/react-native-config

#1