Solved webpack cli NODE_ENV not set on process.env file-loader | webpack stringify (process. NODE_ENV) , 'process.env.DEBUG': JSON. webpack 并且,在使用 process.env.NODE_ENV === 'production' 时,一些 library 可能针对具体用户的环境,删除或添加一些重要代码,以进行代码执行方面的优化。从 webpack v4 开始, 指定 mode 会自动地配置 DefinePlugin: webpack.prod.js 如何從webpack.common.js文件訪問進程env變量? 這是webpack.prd.config.js文件: webpack webpack process env node_env undefined - borgmannrealty.com Be careful with the above solutions since NODE_ENV can be undefined and will throw running .trim() on undefined. Синтаксическая ошибка при обращении к "process.env" на Vue.js webpack React + webpack: 'process.env' is undefined : codehunter