Question: What Is Difference Between @Inject And @Injectable?

What is tree Shakable in angular?

Tree-shakable dependencies enable smaller compiled bundles.

Angular modules ( NgModule s) used to be the primary way to provide application-wide dependencies such as constants, configurations, functions, and class-based services..

What is lazy loading in angular?

How Lazy Loading works? Lazy Loading generally, is a concept where we delay loading of an object until it is needed. In Angular, all the JavaScript components declared in the declarations array app. module. ts are bundled and loaded in one fell swoop when a user visits our site.

What are the side effects of the 3 month injection?

bloating.nausea.vaginitis.appetite decrease or increase.backpain.dizziness.amenorrhea (absence of periods)breast pain/tenderness.More items…

What is providers in angular?

A provider is an object declared to Angular so that it can be injected in the constructor of your components, directives and other classes instantiated by Angular. … A service is a particular type of provider that is declared with its class name, as you can see in the Angular tutorial.

What is root injector in angular?

Angular injectors (generally) return singletons. That is, in the previous example, all components in the application will receive the same random number. … Below the root injector is the root @Component . This particular component has no providers array and will use the root injector for all of its dependencies.

What happens if you take Depo Provera for more than 2 years?

The longer you are on Depo-Provera the more calcium you may lose. This increases the risk of your bones weakening if you use Depo-Provera continuously for a long time (for more than 2 years).

When a component depends on a service the injector can be used to configure dependency injection?

When a component depends on a service, the injector can be used to configure dependency injection. A component defines its input parameters with the @Input decorator. A component is a type of directive and as such, should be defined by the Directive class decorator.

What are the 3 types of injections?

The three main routes are intradermal (ID) injection, subcutaneous (SC) injection and intramuscular (IM) injection. Each type targets a different skin layer: Subcutaneous injections are administered in the fat layer, underneath the skin.

What are the side effects of injectable contraceptives?

The side effects of the birth control shot can include:irregular periods, which are more common in the first 6 to 12 months after your first injection.increased spotting and breakthrough bleeding.a change in appetite.weight gain.a change in sexual drive and interest.nausea.tender, sore breasts.a headache.More items…

What is HttpClient in angular?

Angular provides a simplified client HTTP API for Angular applications, the HttpClient service class in @angular/common/http . The HTTP client service offers the following major features. The ability to request typed response objects. Streamlined error handling. Testability features.

What is @injectable?

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.

What is @inject in angular 6?

@Inject() is a manual mechanism for letting Angular know that a parameter must be injected. It can be used like so: import { Component, Inject } from ‘@angular/core’; import { ChatWidget } from ‘../components/chat-widget’; ​

What is a service in angular?

Angular services are singleton objects that get instantiated only once during the lifetime of an application. … The main objective of a service is to organize and share business logic, models, or data and functions with different components of an Angular application.

What is pipe in angular?

Pipes are a useful feature in Angular. They are a simple way to transform values in an Angular template. … A pipe takes in a value or values and then returns a value. This is great for simple transformations on data but it can also be used in other unique ways.

How long does it take for the 3 month injection to wear off?

To stop using the 3-monthly contraceptive injection you simply stop having the injections. The contraceptive effects wear off 12 weeks from your final injection, and while you can get pregnant within the next month it may take up to a year before your fertility is restored2.