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This is useful when you don't want the server to rebuild in the middle of something. A good example is when running e2e tests. Especially on larger suites, one would prefer to continue working while the build is tested without compromising tests. This will break tests on #4744. They should be adjusted to add the `--watch` flag since they depend on the live reload behaviour during `ng e2e`.
101 lines
3.1 KiB
Markdown
101 lines
3.1 KiB
Markdown
<!-- Links in /docs/documentation should NOT have `.md` at the end, because they end up in our wiki at release. -->
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# ng build
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## Overview
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`ng build` compiles the application into an output directory
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### Creating a build
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```bash
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ng build
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```
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The build artifacts will be stored in the `dist/` directory.
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### Build Targets and Environment Files
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`ng build` can specify both a build target (`--target=production` or `--target=development`) and an
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environment file to be used with that build (`--environment=dev` or `--environment=prod`).
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By default, the development build target and environment are used.
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The mapping used to determine which environment file is used can be found in `.angular-cli.json`:
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```json
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"environmentSource": "environments/environment.ts",
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"environments": {
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"dev": "environments/environment.ts",
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"prod": "environments/environment.prod.ts"
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}
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```
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These options also apply to the serve command. If you do not pass a value for `environment`,
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it will default to `dev` for `development` and `prod` for `production`.
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```bash
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# these are equivalent
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ng build --target=production --environment=prod
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ng build --prod --env=prod
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ng build --prod
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# and so are these
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ng build --target=development --environment=dev
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ng build --dev --e=dev
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ng build --dev
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ng build
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```
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You can also add your own env files other than `dev` and `prod` by doing the following:
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- create a `src/environments/environment.NAME.ts`
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- add `{ "NAME": 'src/environments/environment.NAME.ts' }` to the `apps[0].environments` object in `.angular-cli.json`
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- use them via the `--env=NAME` flag on the build/serve commands.
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### Base tag handling in index.html
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When building you can modify base tag (`<base href="/">`) in your index.html with `--base-href your-url` option.
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```bash
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# Sets base tag href to /myUrl/ in your index.html
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ng build --base-href /myUrl/
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ng build --bh /myUrl/
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```
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### Bundling
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All builds make use of bundling, and using the `--prod` flag in `ng build --prod`
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or `ng serve --prod` will also make use of uglifying and tree-shaking functionality.
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## Options
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`--watch` (`-w`) rebuild when files change
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`--target` (`-t`) define the build target
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`--environment` (`-e`) defines the build environment
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`--prod` flag to set build target and environment to production
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`--dev` flag to set build target and environment to development
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`--output-path` (`-po`) path where output will be placed
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`--aot` flag whether to build using Ahead of Time compilation
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`--sourcemap` (`-sm`) output sourcemaps
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`--vendor-chunk` (`-vb`) use a separate bundle containing only vendor libraries
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`--base-href` (`-bh`) base url for the application being built
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`--deploy-url` (`-d`) url where files will be deployed
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`--verbose` (`-v`) adds more details to output logging
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`--progress` (`-pr`) log progress to the console while building
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`--extract-css` (`-ec`) extract css from global styles onto css files instead of js ones
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`--output-hashing` define the output filename cache-busting hashing mode
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`--stats-json` generates a `stats.json` file which can be analyzed using tools such as: `webpack-bundle-analyzer` or https://webpack.github.io/analyse
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`--poll` enable and define the file watching poll time period (milliseconds)
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