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]


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 --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.


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


--aot=true|false Build using Ahead of Time compilation. Default: false
--baseHref=baseHref Base url for the application being built.
--buildEventLog=buildEventLog EXPERIMENTAL Output file path for Build Event Protocol events

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

--commonChunk=true|false Use a separate bundle containing code used across multiple bundles.
Default: true
--configuration=configuration 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
--deleteOutputPath=true|false Delete the output path before building.
Default: true
--deployUrl=deployUrl URL where files will be deployed.
--es5BrowserSupport=true|false Deprecated: This will be determined from the list of supported browsers specified in the 'browserslist' file.
Enables conditionally loaded ES2015 polyfills.
--evalSourceMap=true|false Deprecated
Output in-file eval sourcemaps.
Default: false
--extractCss=true|false Extract css from global styles into css files instead of js ones.
  Default: false
--extractLicenses=true|false Extract all licenses in a separate file.
Default: false
--forkTypeChecker=true|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
--i18nFile=i18nFile Localization file to use for i18n.
--i18nFormat=i18nFormat Format of the localization file specified with --i18n-file.
--i18nLocale=i18nLocale Locale to use for i18n.
How to handle missing translations for i18n.
--index=index The name of the index HTML file.
--lazyModules List of additional NgModule files that will be lazy loaded. Lazy router modules will be discovered automatically.
--main=main The full path for the main entry point to the app, relative to the current workspace.
--namedChunks=true|false Use file name for lazy loaded chunks.
Default: true
--ngswConfigPath=ngswConfigPath Path to ngsw-config.json.
--optimization=true|false Enables optimization of the build output.

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.

--polyfills=polyfills The full path for the polyfills file, relative to the current workspace.
--preserveSymlinks=true|false 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

--progress=true|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


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


Generates a service worker config for production builds.
Default: false

--showCircularDependencies=true|false Show circular dependency warnings on builds.
Default: true

--skipAppShell=true|false "top">

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.

--vendorChunk=true|false 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


TypeScript configuration for Web Worker modules.

Previous: ng add
Next: ng config

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