ngComponentOutlet or ndcDynamicComponent not working with angular 7 - html

Question

hello I am really confused that why it is not working its very simple still i am getting issue.
I am getting blank output & my components has some data which is getting updated if i directly call it with its selector.
here is my code.
app.module.ts
import { BrowserModule } from '#angular/platform-browser';
import { NgModule } from '#angular/core';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { HeatSealComponent } from './heat-seal/heat-seal.component';
import { PrinterComponent } from './printer/printer.component';
import { DynamicModule } from 'ng-dynamic-component';
#NgModule({
declarations: [
AppComponent,
HeatSealComponent,
PrinterComponent
],
imports: [
BrowserModule,
AppRoutingModule,
[DynamicModule],
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
app.component.html
<ng-container *ngComponentOutlet="dumm"></ng-container>
<ndc-dynamic [ndcDynamicComponent]="dumm"></ndc-dynamic>
app.component.ts
import { element } from 'protractor';
import { Component, OnInit } from '#angular/core';
import { HeatSealComponent } from './heat-seal/heat-seal.component';
import { PrinterComponent } from './printer/printer.component';
#Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit{
title = 'dynamic-loading';
dumm = HeatSealComponent;
ngOnInit() {
// this.myContent = {name:'nope'};
}
}

Answer 1

The solution is to declare the components in the EntryComponents in the my module file.
import { BrowserModule } from '#angular/platform-browser';
import { NgModule } from '#angular/core';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { HeatSealComponent } from './heat-seal/heat-seal.component';
import { PrinterComponent } from './printer/printer.component';
import { DynamicModule } from 'ng-dynamic-component';
#NgModule({
declarations: [
AppComponent,
HeatSealComponent,
PrinterComponent
],
imports: [
BrowserModule,
AppRoutingModule,
[DynamicModule],
],
providers: [],
bootstrap: [AppComponent],
entryComponents: [HeatSealComponent, PrinterComponent], // ADD THIS
})
export class AppModule { }