When importing an external class in TypeScript from another class, do I need to create a new instance of the variable before using it inside another class? For example, should I do let cli = new client()? Some tutorials barely mention this step and simply import and use it directly. Can you please provide some clarification on this? Thank you.
Thanks
It all comes down to what you are bringing into your project...
If you're importing a CLASS ... the answer is YES .. here's an example:
export class User{
public name:string;
public surname:string;
}
then in another ts file:
import { User } from '../../User';
let user= new User();
user.name= 'Fred';
user.surname = 'Scamuzzi';
IF you're importing an INTERFACE .. then it's a NO:
for instance
import { OnInit } from '@angular/core';
import { User } from '../../User';
export class AppComponent implements OnInit { // --> it requires you to implement the method declared in OnInit interface
ngOnInit(): void { // implemented
let currentUser = new User();
}
}
Similarly, when importing a Component in NgModule for declaration, you can simply do:
import { BrowserModule } from '@angular/platform-browser';
import { HttpClientModule, HTTP_INTERCEPTORS } from '@angular/common/http';
import { AppComponent } from './app.component';
import {AuthService} from './shared/services/AuthService.service';
@NgModule({
imports: [
BrowserModule,
HttpClientModule
],
declarations: [
AppComponent
],
providers: [
AuthService
],
bootstrap: [AppComponent]
})
export class AppModule {
}
I trust this clarifies things for you ....
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