The NODE_ENV environment variable is read-only and cannot be overwritten. You can use the environment variable to check if your application is running in development or production mode. App.js if (process.env.NODE_ENV !== 'production') { console.log('App is not in production mode'); }...
By default react-native-config will read from.env, but you can change it when building or releasing your app. The simplest approach is to tell it what file to read with an environment variable, like: $ ENVFILE=.env.staging react-native run-ios # bash $ SET ENVFILE=.env.staging && re...
There is also a built-in environment variable calledNODE_ENV. You can read it fromprocess.env.NODE_ENV. When you runnpm start, it is always equal to'development', when you runnpm testit is always equal to'test', and when you runnpm run buildto make a production bundle, it is always...
One thing that we've noticed is that metro overwrites the test environment variable even if you specify a config, so we've added a way to fix this. By default, defining the APP_ENV variable can be used to set your preferred environment, separate from NODE_ENV. // package.json { "scr...
const env = getClientEnvironment(paths.publicUrlOrPath.slice(0, -1)); const shouldUseReactRefresh = env.raw.FAST_REFRESH; // common function to get style loaders const getStyleLoaders = (cssOptions, preProcessor) => { const loaders = [ isEnvDevelopment && require.resolve('style-loader'),...
As you can see the environment variable is now available. However if all you want is to tell if the app is running in production,process.env.NODE_ENVis enough. You don't need to pass anything else. I hope this helps! well, both of these should work on Mac and *nix TMK: ...
Read instructions below for using assets from JavaScript and HTML. You can, however, create more top-level directories. They will not be included in the production build so you can use them for things like documentation. Available Scripts ...
There is also a special built-in environment variable called NODE_ENV. You can read it from process.env.NODE_ENV. When you run npm start, it is always equal to 'development', when you run npm test it is always equal to 'test', and when you run npm run build to make a production...
Read instructions below for using assets from JavaScript and HTML. You can, however, create more top-level directories. They will not be included in the production build so you can use them for things like documentation. Available Scripts ...
ignored:/node_modules/},//Enable HTTPS if the HTTPS environment variable is set to 'true'https: protocol ==="https", host: host });/** * 省略其他代码*/openBrowser(protocol+'://'+ host +':'+ port +'/');//打开浏览器 向服务器发送请求}); ...