56 lines
1.7 KiB
Markdown
56 lines
1.7 KiB
Markdown
# Opting into Angular Ivy
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Ivy is the code name for Angular's [next-generation compilation and rendering pipeline](https://blog.angular.io/a-plan-for-version-8-0-and-ivy-b3318dfc19f7). Starting with Angular version 8, you can choose to opt in to start using a preview version of Ivy and help in its continuing development and tuning.
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<div class="alert is-helpful">
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To preview Ivy, use `@angular/core@next` version of Angular (8.1.x), rather than `@angular/core@latest` (8.0.x), as it contains all the latest bug fixes and improvements.
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</div>
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## Using Ivy in a new project
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To start a new project with Ivy enabled, use the `--enable-ivy` flag with the [`ng new`](cli/new) command:
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```sh
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ng new shiny-ivy-app --enable-ivy
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```
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The new project is automatically configured for Ivy. Specifically, the enableIvy option is set to `true` in the project's `tsconfig.app.json` file.
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## Using Ivy in an existing project
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To update an existing project to use Ivy, set the `enableIvy` option in the `angularCompilerOptions` in your project's `tsconfig.app.json`.
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```json
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{
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"compilerOptions": { ... },
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"angularCompilerOptions": {
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"enableIvy": true
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}
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}
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```
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AOT compilation with Ivy is faster and should be used by default. In the `angular.json` workspace configuration file, set the default build options for your project to always use AOT compilation.
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```json
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{
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"projects": {
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"my-existing-project": {
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"architect": {
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"build": {
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"options": {
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...
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"aot": true,
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}
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}
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}
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}
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}
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}
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```
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To stop using the Ivy compiler, set `enableIvy` to `false` in `tsconfig.app.json`, or remove it completely. Also remove `"aot": true` from your default build options if you didn't have it there before.
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