Angular 2 with CLI - build for production

Updated for Angular v6+

# Prod - these are equivalentng build --configuration=productionng build --c=productionng build --prod=true# Dev - and so are theseng build --configuration=developmentng build --c=developmentng build --prod=falseng build

More flag settings here

https://angular.io/cli/build

Per Angular-cli's github wiki v2+, these are the most common ways to initiate a dev and production build

# Prod these are equivalentng build --target=production --environment=prodng build --prod --env=prodng build --prod# Dev and so are theseng build --target=development --environment=devng build --dev --env=devng build --devng build

There are different default flags that will affect --dev vs --prod builds.

Flag                 --dev      --prod--aot                false      true--environment        dev        prod--output-hashing     media      all--sourcemaps         true       false--extract-css        false      true

--prod also sets the following non-flaggable settings:

• Adds service worker if configured in .angular-cli.json.
• Replaces process.env.NODE_ENV in modules with the productionvalue (this is needed for some libraries, like react).
• Runs UglifyJS on the code.

I need to do some troubleshooting in order to get AOT working. When I ran:

ng build --prod --aot=false

I would get will return a error similar to

Module not found: Error: Can't resolve './$$_gendir/app/app.module.ngfactory'

Originally, I had to do some project refactoring to get AOT to work. However, they may be a fix if you are encountering this error. Try

npm i enhanced-resolve@3.3.0

https://github.com/angular/angular-cli/issues/7113

Try using: ng build --target=productionThis should work.

try this

 ng build --env=prod

The build system defaults to the dev environment which uses environment.ts, but if you do ng build --env=prod then environment.prod.ts will be used instead.

sample result if your project is new angular cli app.

 10% building mod3439ms building modules                                                                     1ms add01564ms 917ms asset45ms emittingHash: 9216e76d6f10637c945c                  Version: webpack 2.1.0-beta.22Time: 6358ms            Asset       Size  Chunks             Chunk Names   main.bundle.js     2.6 MB    0, 2  [emitted]  main styles.bundle.js    10.2 kB    1, 2  [emitted]  styles        inline.js    5.53 kB       2  [emitted]  inline         main.map    2.61 MB    0, 2  [emitted]  main       styles.map    14.2 kB    1, 2  [emitted]  styles       inline.map    5.59 kB       2  [emitted]  inline       index.html  482 bytes          [emitted]  assets/.npmignore    0 bytes          [emitted]  chunk    {0} main.bundle.js, main.map (main) 2.06 MB {1} [initial] [rendered]chunk    {1} styles.bundle.js, styles.map (styles) 9.96 kB {2} [initial] [rendered]chunk    {2} inline.js, inline.map (inline) 0 bytes [entry] [rendered]Child html-webpack-plugin for "index.html":         Asset     Size  Chunks       Chunk Names    index.html  2.82 kB       0           chunk    {0} index.html 350 bytes [entry] [rendered]

Done and it's under /dist unless you have changed outDir in angular-cli.json