Node env

Nov 23, 202341

AI-generated summary

The code is reading environment variables from a .env file using the dotenv package. It prints the value of the NODE_ENV variable and exits. The webpack configuration also sets the NODE_ENV variable. The esbuild configuration defines process.env.TITLE and process.env.VERSION variables. The index.js file uses these variables.

index.js will read process.env.* in .env
But u can require dotenv to get env in command line:

// package.json
"scripts": {
  "build:dev": "webpack",
  "build:prod": "cross-env NODE_ENV=production webpack"
},

// .env
NODE_ENV=development

// webpack.config.js
const dotenv = require("dotenv")

dotenv.config()
console.log(process.env.NODE_ENV)

process.exit(0)

// console output
npm run build:dev      // "development"
npm run build:prod     // "production"

Also, in webpack config:

"build:prod": "webpack --node-env=production"

in esbuild config: