Angular-AppComponent error. How solve it?

I have a problem with my Angular project. In my app.module.ts the code is below:

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { BmiModule } from './bmi/bmi.module';

@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule,
AppRoutingModule,
BmiModule
],
providers: [],
bootstrap: [
AppComponent
]
})
export class AppModule { }


My app.component.ts is below:

import { Component } from '@angular/core';
import { CommonModule } from '@angular/common';
import { RouterOutlet } from '@angular/router';


@Component({
selector: 'app-root',
standalone: true,
imports: [CommonModule, RouterOutlet],
templateUrl: './app.component.html',
styleUrl: './app.component.css'
})

export class AppComponent {
title = 'WP4_HF_004';
}


My app.component.html:

<h1>BMI kalkulátor</h1>
<p>Ez egy BMI kalkulátor. A lenti 4 gomb segítségével lehet módosítani a súly- és magasságparamétereket.
<app-bmi-calculator></app-bmi-calculator>
</p>


I got an error in app.module.ts:

Component AppComponent is standalone, and cannot be declared in an NgModule. Did you mean to import it instead?
​

If I didn't import my AppComponent in app.module.ts I get an error in app.component.html:

'app-bmi-calculator' is not a known element:

1. If 'app-bmi-calculator' is an Angular component, then verify that it is included in the '@Component.imports' of this component.
2. If 'app-bmi-calculator' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@Component.schemas' of this component to suppress this message.ngtsc(-998001) app.component.ts(4, 5):

​

Error occurs in the template of component AppComponent.

I searched the problem on the internet but I didn't find the solve.

Continue reading...