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- angular - What does @Injectable mean? - Stack Overflow
Does @Injectable mean that we can inject MyService into other classes or that we can inject other classes into MyService? @Injectable({ providedIn: 'root' }) export class MyService { construc
- Why do we use @Injectable () decorator , when we can actually inject . . .
The @Injectable () decorator has the providedIn metadata option, where you can specify the provider of the decorated service class with the root injector, or with the injector for a specific NgModule To utilize a class with DI it must have a provider, and the @Injectable () decorator is one way of registering a provider
- node. js - What is Injectable in NestJS? - Stack Overflow
import { Injectable } from '@nestjs common'; const userMock = [{ account: 'dung', password: '12345678' }]; @Injectable() export class UserService { getUser() { return userMock } } I not really understand @Injectable in NestJS Some tutorial tell @Injectable tell the @Controller know it's an install and can use it as a Dependency Injection But when I remove it, it's still working Please give
- typescript - What is the purpose of providedIn with the Injectable . . .
Injectable is provided - an instance of the Injectable will be given to classes below this specific injector level, whenever they request it Injectable is injected - a class constructor has requested to be given some instance of the service, so Angular will try to give it the nearest instance that can be found in the injector hierarchy "
- What is the need for @Inject and Injectable in Angular DI?
Angular doesn't use metadata generated by TypeScript when you use @Inject decorator explicitly, that's why you don't need to apply @Injectable if you use @Inject
- What is the difference between @Inject and @Injectable in Angular 2 . . .
The @Injectable decorator aims to actually set some metadata about which dependencies to inject into the constructor of the associated class It's a class decorator that doesn't require parameters
- dependency injection - Unused Injectable services with providedIn . . .
In an Angular 19 standalone application, I have an API client file containing over 100 @Injectable services, each marked with providedIn: 'root' However, only 3–4 of these services are used in the app
- When do we need to use @Injectable on our services in Angular2?
The first paragraph sounds like the previous @Injectable documentation, while the second paragraph got it right Just keep in mind that it is just recommended that we always add the @Injectable decorator on all our services as we may later decide that we need to add dependency parameters, but forget the add the @Injectable when we do so
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