**Documentation below is for CLI version 6 and we no longer accept PRs to improve this. For version 7 see [here](https://angular.io/cli/build)**. # ng build ## Overview `ng build` compiles the application into an output directory. ```bash ng build [project] ``` ### Creating a build ```bash ng build ``` The build artifacts will be stored in the `dist/` directory. All commands that build or serve your project, `ng build/serve/e2e`, will delete the output directory (`dist/` by default). This can be disabled via the `--delete-output-path=false` option. ### Base tag handling in index.html When building you can modify base tag (``) in your index.html with `--base-href your-url` option. ```bash # Sets base tag href to /myUrl/ in your index.html ng build --base-href /myUrl/ ``` ### Bundling & Tree-Shaking All builds make use of bundling and limited tree-shaking, while `--prod` builds also run limited dead code elimination via UglifyJS. ### `--build-optimizer` and `--vendor-chunk` When using Build Optimizer the vendor chunk will be disabled by default. You can override this with `--vendor-chunk=true`. Total bundle sizes with Build Optimizer are smaller if there is no separate vendor chunk because having vendor code in the same chunk as app code makes it possible for Uglify to remove more unused code. ### CSS resources Resources in CSS, such as images and fonts, will be copied over automatically as part of a build. If a resource is less than 10kb it will also be inlined. You'll see these resources be outputted and fingerprinted at the root of `dist/`. ### ES2015 support To build in ES2015 mode, edit `./tsconfig.json` to use `"target": "es2015"` (instead of `es5`). This will cause application TypeScript and Uglify be output as ES2015, and third party libraries to be loaded through the `es2015` entry in `package.json` if available. Be aware that JIT does not support ES2015 and so you should build/serve your app with `--aot`. See https://github.com/angular/angular-cli/issues/7797 for details. ## Options
prod

--prod

Flag to set configuration to "prod".

configuration

--configuration (alias: -c)

Specify the configuration to use.

main

--main

The name of the main entry-point file.

polyfills

--polyfills

The name of the polyfills file.

ts-config

--ts-config

The name of the TypeScript configuration file.

optimization

--optimization

Enables optimization of the build output.

output-path

--output-path

Path where output will be placed.

aot

--aot

Build using Ahead of Time compilation.

source-map

--source-map

Output sourcemaps.

eval-source-map

--eval-source-map

Output in-file eval sourcemaps.

vendor-source-map

--vendor-source-map

Resolve vendor packages sourcemaps.

vendor-chunk

--vendor-chunk

Use a separate bundle containing only vendor libraries.

common-chunk

--common-chunk

Use a separate bundle containing code used across multiple bundles.

base-href

--base-href

Base url for the application being built.

deploy-url

--deploy-url

URL where files will be deployed.

verbose

--verbose

Adds more details to output logging.

progress

--progress

Log progress to the console while building.

i18n-file

--i18n-file

Localization file to use for i18n.

i18n-format

--i18n-format

Format of the localization file specified with --i18n-file.

i18n-locale

--i18n-locale

Locale to use for i18n.

i18n-missing-translation

--i18n-missing-translation

How to handle missing translations for i18n.

extract-css

--extract-css

Extract css from global styles onto css files instead of js ones.

watch

--watch

Run build when files change.

output-hashing

--output-hashing

Define the output filename cache-busting hashing mode.

poll

--poll

Enable and define the file watching poll time period in milliseconds.

delete-output-path

--delete-output-path

Delete the output path before building.

preserve-symlinks

--preserve-symlinks

Do not use the real path when resolving modules.

extract-licenses

--extract-licenses

Extract all licenses in a separate file, in the case of production builds only.

show-circular-dependencies

--show-circular-dependencies

Show circular dependency warnings on builds.

build-optimizer

--build-optimizer

Enables @angular-devkit/build-optimizer optimizations when using the 'aot' option.

named-chunks

--named-chunks

Use file name for lazy loaded chunks.

subresource-integrity

--subresource-integrity

Enables the use of subresource integrity validation.

service-worker

--service-worker

Generates a service worker config for production builds.

ngsw-config-path

--ngsw-config-path

Path to ngsw-config.json.

skip-app-shell

--skip-app-shell

Flag to prevent building an app shell.

index

--index

The name of the index HTML file.

stats-json

--stats-json

Generates a 'stats.json' file which can be analyzed using tools such as: #webpack-bundle-analyzer' or https://webpack.github.io/analyse.

fork-type-checker

--fork-type-checker

Run the TypeScript type checker in a forked process.