Issues with getting started with webpack 4

node.js webpack webpack-4
sakhunzai picture sakhunzai · Feb 26, 2018 · Viewed 25.1k times · Source

I am following the tutorial exactly as given here . But I am amazed that the docs seems outdated. e.g

npx webpack src/index.js dist/bundle.js fails with:

The CLI moved into a separate package: webpack-cli. Please install 'webpack-cli' in addition to webpack itself to use the CLI. -> When using npm: npm install webpack-cli -D -> When using yarn: yarn add webpack-cli -D

If I install webpack-cli and try again I see this error:

Hash: af9bc06fd641eb0ffd1e Version: webpack 4.0.0 Time: 3865ms Built at: 2018-2-26 05:10:45 1 asset Entrypoint main = main.js 1 (webpack)/buildin/module.js 519 bytes {0} [built] 2 (webpack)/buildin/global.js 509 bytes {0} [built] [3] ./src/index.js 212 bytes {0} [built] [4] multi ./src/index.js dist/bundle.js 40 bytes {0} [built] + 1 hidden module

WARNING in configuration The 'mode' option has not been set. Set 'mode' option to 'development' or 'production' to enable defaults for this environment.

ERROR in multi ./src/index.js dist/bundle.js Module not found: Error: Can't resolve 'dist/bundle.js' in '/var/app/webpack_demo' @ multi ./src/index.js dist/bundle.js

I hope I am not doing something crazy, given the popularity of webpack the documentation should reflect the actual behavior. Let me know if I am doing something wrong.

Edit

A details description of upgrade to webpack 4,that might be helpful

Answer

Iurii Budnikov picture Iurii Budnikov · Feb 28, 2018

You can pass mode param in the webpack config or cli command.

Config: mode: 'development' or mode: 'production'

CLI: webpack --mode development or webpack --mode production

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