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'),...
In computer science, an operation, function or expression is said to have a side effect if it modifies some state variable value(s) outside its local environment, that is to say has an observable effect besides returning a value (the main effect) to the invoker of the operation. 通俗来说...
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 && react-native run-ios # windows $ env:ENVFILE=".env.staging"; react-native run-ios # powershell ...
For example, to get the environment variable npm_package_version: REACT_APP_VERSION=$npm_package_version # also works: # REACT_APP_VERSION=${npm_package_version} Or expand variables local to the current .env file: DOMAIN=www.example.com REACT_APP_FOO=$DOMAIN/foo REACT_APP_BAR=$DOMAIN/...
For example, to get the environment variablenpm_package_version: REACT_APP_VERSION=$npm_package_version # also works: # REACT_APP_VERSION=${npm_package_version} Or expand variables local to the current.envfile: DOMAIN=www.example.com
For example, to get the environment variable npm_package_version: REACT_APP_VERSION=$npm_package_version # also works: # REACT_APP_VERSION=${npm_package_version} Or expand variables local to the current .env file: DOMAIN=www.example.com REACT_APP_FOO=$DOMAIN/foo REACT_APP_BAR=$DOMAIN/...
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: ...
Expanding Environment Variables In .env Note: this feature is available with react-scripts@1.1.0 and higher. Expand variables already on your machine for use in your .env file (using dotenv-expand). For example, to get the environment variable npm_package_version: REACT_APP_VERSION=$npm_packa...
ignored:/node_modules/},//Enable HTTPS if the HTTPS environment variable is set to 'true'https: protocol ==="https", host: host });/** * 省略其他代码*/openBrowser(protocol+'://'+ host +':'+ port +'/');//打开浏览器 向服务器发送请求}); ...
For example, to get the environment variable npm_package_version:REACT_APP_VERSION=$npm_package_version # also works: # REACT_APP_VERSION=${npm_package_version} Or expand variables local to the current .env file:DOMAIN=www.example.com REACT_APP_FOO=$DOMAIN/foo REACT_APP_BAR=$DOMAIN/bar ...