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With #31953 we moved the factories for components, directives and pipes into a new field called `ngFactoryDef`, however I decided not to do it for injectables, because they needed some extra logic. These changes set up the `ngFactoryDef` for injectables as well. For reference, the extra logic mentioned above is that for injectables we have two code paths: 1. For injectables that don't configure how they should be instantiated, we create a `factory` that proxies to `ngFactoryDef`: ``` // Source @Injectable() class Service {} // Output class Service { static ngInjectableDef = defineInjectable({ factory: () => Service.ngFactoryFn(), }); static ngFactoryFn: (t) => new (t || Service)(); } ``` 2. For injectables that do configure how they're created, we keep the `ngFactoryDef` and generate the factory based on the metadata: ``` // Source @Injectable({ useValue: DEFAULT_IMPL, }) class Service {} // Output export class Service { static ngInjectableDef = defineInjectable({ factory: () => DEFAULT_IMPL, }); static ngFactoryFn: (t) => new (t || Service)(); } ``` PR Close #32433 |
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Angular
Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages.
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