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 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

A list of CommonJS packages that are allowed to be used without a build time warning.


Build using Ahead of Time compilation.

Default: false


Base url for the application being built.


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.


Concatenate modules with Rollup before bundling them with Webpack.

Default: false


Deprecated: Deprecated since version 11.0. No longer required to disable CSS extraction for HMR.

Extract CSS from global styles into '.css' files instead of '.js'.

Default: true


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


Deprecated: Use 'locales' object in the project metadata instead.

Localization file to use for i18n.


Deprecated: No longer needed as the format will be determined automatically.

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


Deprecated: Use 'localize' instead.

Locale to use for i18n.

--i18nMissingTranslation= warning|error|ignore

How to handle missing translations for i18n.

Default: warning


Configures the generation of the application's HTML index.


Deprecated: 'SystemJsNgModuleLoader' is deprecated, and this is part of its usage. Use 'import()' syntax instead.

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.

Default: false

--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. If unset then will default to true if NodeJS option --preserve-symlinks is set.


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.


Log progress to the console while building.

Default: true

--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


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


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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