ng build

Compiles an Angular app into an output directory named dist/ at the given output path. Must be executed from within a workspace directory.

ng build <project> [options]

ng b <project> [options]


The command can be used to build a project of type "application" or "library". When used to build a library, a different builder is invoked, and only the ts-config, configuration, and watch options are applied. All other options apply only to building applications.

The application builder uses the webpack build tool, with default configuration options specified in the workspace configuration file (angular.json) or with a named alternative configuration. A "production" configuration is created by default when you use the CLI to create the project, and you can use that configuration by specifying the --configuration="production" or the --prod="true" option.

The configuration options generally correspond to the command options. You can override individual configuration defaults by specifying the corresponding options on the command line. The command can accept option names given in either dash-case or camelCase. Note that in the configuration file, you must specify names in camelCase.

Some additional options can only be set through the configuration file, either by direct editing or with the ng config command. These include assets, styles, and scripts objects that provide runtime-global resources to include in the project. Resources in CSS, such as images and fonts, are automatically written and fingerprinted at the root of the output folder.

For further details, see Workspace Configuration.


Argument Description

The name of the project to build. Can be an application or a library.


Option Description

Build using Ahead of Time compilation.

Default: false


Base url for the application being built.


EXPERIMENTAL Output file path for Build Event Protocol events


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

Default: false


Use a separate bundle containing code used across multiple bundles.

Default: true


A named build target, as specified in the "configurations" section of angular.json. Each named target is accompanied by a configuration of option defaults for that target. Setting this explicitly overrides the "--prod" flag

Aliases: -c

--crossOrigin= none|anonymous|use-credentials

Define the crossorigin attribute setting of elements that provide CORS support.

Default: none


Delete the output path before building.

Default: true


URL where files will be deployed.


Deprecated: This will be determined from the list of supported browsers specified in the 'browserslist' file.

Enables conditionally loaded ES2015 polyfills.



Output in-file eval sourcemaps.

Default: false


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

Default: false


Extract all licenses in a separate file.

Default: false


Run the TypeScript type checker in a forked process.

Default: true

--help= true|false|json|JSON

Shows a help message for this command in the console.

Default: false


Localization file to use for i18n.


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


Locale to use for i18n.

--i18nMissingTranslation= i18nMissingTranslation

How to handle missing translations for i18n.


Configures the generation of the application's HTML index.


List of additional NgModule files that will be lazy loaded. Lazy router modules will be discovered automatically.


The full path for the main entry point to the app, relative to the current workspace.


Use file name for lazy loaded chunks.

Default: true


Path to ngsw-config.json.


Enables optimization of the build output.

--outputHashing= none|all|media|bundles

Define the output filename cache-busting hashing mode.

Default: none


The full path for the new output directory, relative to the current workspace.

By default, writes output to a folder named dist/ in the current project.


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


The full path for the polyfills file, relative to the current workspace.


Do not use the real path when resolving modules.

Default: false


Shorthand for "--configuration=production". When true, sets the build configuration to the production target. By default, the production target is set up in the workspace configuration such that all builds make use of bundling, limited tree-shaking, and also limited dead code elimination.


Deprecated: Use "NG_BUILD_PROFILING" environment variable instead.

Output profile events for Chrome profiler.

Default: false


Log progress to the console while building.



Change root relative URLs in stylesheets to include base HREF and deploy URL. Use only for compatibility and transition. The behavior of this option is non-standard and will be removed in the next major release.

Default: false

--resourcesOutputPath= resourcesOutputPath

The path where style resources will be placed, relative to outputPath.



Generates a service worker config for production builds.

Default: false


Show circular dependency warnings on builds.

Default: true



Flag to prevent building an app shell.

Default: false


Output sourcemaps.

Default: true


Generates a 'stats.json' file which can be analyzed using tools such as 'webpack-bundle-analyzer'.

Default: false


Enables the use of subresource integrity validation.

Default: false


The full path for the TypeScript configuration file, relative to the current workspace.


Use a separate bundle containing only vendor libraries.

Default: true



Resolve vendor packages sourcemaps.

Default: false


Adds more details to output logging.

Default: false


Run build when files change.

Default: false

--webWorkerTsConfig= webWorkerTsConfig

TypeScript configuration for Web Worker modules.

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