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Angular: error NG8001: 'component' is not a known element

I'm trying to use a component ('register') inside the app.component and it throws me this error:
Error: src/app/app.component.html:88:1 - error NG8001: 'register' is
not a known element:
If 'register' is an Angular component, then verify that it is part of this module.
To allow any element add 'NO_ERRORS_SCHEMA' to the '#NgModule.schemas' of this component.
88
My app.component.html:
...
<register></register>
...
My register.component.ts:
import { Component, OnInit } from '#angular/core';
#Component({
selector: 'app-register',
templateUrl: './register.component.html',
styleUrls: ['./register.component.css']
})
export class RegisterComponent implements OnInit {
public title:string;
constructor() {
this.title = 'Registrar';
}
ngOnInit(): void {
console.log('Componente de registro cargado');
}
}
My app.component.ts:
import { Component } from '#angular/core';
#Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
title = 'red soc';
}
My app.module.ts
import { NgModule } from '#angular/core';
import { BrowserModule } from '#angular/platform-browser';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { RegisterComponent } from './register/register.component';
#NgModule({
declarations: [
AppComponent,
RegisterComponent
],
imports: [
BrowserModule,
AppRoutingModule,
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }

Your selector is 'app-register' but you are using 'register' .
Use 'app-register' istead of 'register'
I hope it will solve the issue.

Uncaught CKEditorError: ckeditor-duplicated-modules in angular 11

i want to use Ckeditor and Ckfinder thgother in angular .
i u use by this way :
Module :
import { NgModule } from '#angular/core';
import { FormsModule } from '#angular/forms';
import { BrowserModule } from '#angular/platform-browser';
import { CKEditorModule } from '#ckeditor/ckeditor5-angular';
import { AppComponent } from './app.component';
#NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule,
FormsModule,
CKEditorModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
and this is my component :
import { Component, OnInit } from '#angular/core';
import * as ClassicEditor from '#ckeditor/ckeditor5-build-classic';
import CKFinder from '#ckeditor/ckeditor5-ckfinder/src/ckfinder';
#Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.scss']
})
export class AppComponent implements OnInit {
public Editor = ClassicEditor;
ngOnInit(): void {
ClassicEditor
.create(document.querySelector('#editor'), {
plugins: [CKFinder],
// Enable the "Insert image" button in the toolbar.
toolbar: ['uploadImage' ],
ckfinder: {
// Upload the images to the server using the CKFinder QuickUpload command.
uploadUrl: 'https://example.com/ckfinder/core/connector/php/connector.php?command=QuickUpload&type=Images&responseType=json'
}
});
}
}
and this is Html Code :
<ckeditor [editor]="Editor" [config]="{ toolbar: [ 'heading','ckfinder', '|', 'bold', 'italic' ] }"
data="<p>Hello, world!</p>"></ckeditor>
but it show me this error:
Uncaught CKEditorError: ckeditor-duplicated-modules
whats the problem ? how can i use the Ckfinder in angular ?

You can use the official CK Editor 5 Angular component.
Documentation: https://ckeditor.com/docs/ckeditor5/latest/builds/guides/integration/frameworks/angular.html
GitHub:
https://github.com/ckeditor/ckeditor5-angular
You can create a custom build using Online Builder tool with all the required plugins and then import that build in angular.
I have been using the custom build with custom plugins without any issues.

No component factory found for DialogDataExampleDialog. Did you add it to #NgModule.entryComponents?

I am new on Angular. I am integrating MatDialog . I copied code from Angular official documentation https://material.angular.io/components/dialog/overview. I am facing this error when i click on Open dialog.
Here is My donations.component.ts
import {MatDialog, MAT_DIALOG_DATA} from '#angular/material/dialog';
export interface DialogData {
animal: 'panda' | 'unicorn' | 'lion';
}
#Component({
selector: 'app-donations',
templateUrl: './donations.component.html',
styleUrls: ['./donations.component.css']
})
export class DonationsComponent implements OnInit {
constructor(public dialog: MatDialog) {}
openDialog() {
this.dialog.open(DialogDataExampleDialog, {
data: {
animal: 'panda'
}
});
}
ngOnInit(): void {
}
}
#Component({
selector: 'dialog-data-example-dialog',
templateUrl: 'dialog-data-example-dialog.html',
})
#Injectable({ providedIn: 'root' })
export class DialogDataExampleDialog {
constructor(#Inject(MAT_DIALOG_DATA) public data: DialogData) {}
}
Here is My donations.module.ts
import { CommonModule } from '#angular/common';
import { DonationsComponent } from './donations.component';
import { DialogDataExampleDialog } from './donations.component';
import { DonationsRoutingModule } from './donations-routing.module';
import {MatTableModule} from '#angular/material/table';
import { MatPaginatorModule } from '#angular/material/paginator';
import { MatSortModule } from '#angular/material/sort';
import { MatFormFieldModule } from '#angular/material/form-field';
import { MatInputModule } from '#angular/material/input';
import {MatCheckboxModule} from '#angular/material/checkbox';
import {MatSelectModule} from '#angular/material/select';
import {MatButtonModule} from '#angular/material/button';
import {MatIconModule} from '#angular/material/icon';
import {MatMenuModule} from '#angular/material/menu';
#NgModule({
declarations: [DonationsComponent,DialogDataExampleDialog],
imports: [
CommonModule,
DonationsRoutingModule,
MatTableModule,
MatSortModule,
MatPaginatorModule,
MatFormFieldModule,
MatInputModule,
MatCheckboxModule,
MatSelectModule,
MatButtonModule,
MatIconModule,
MatMenuModule,
],
exports: [DonationsComponent],
entryComponents: [DialogDataExampleDialog],
})
export class DonationsModule { }
Here is My donations.component.html
<button mat-button (click)="openDialog()">Open dialog</button>
Here is My dialog-data-example-dialog.html
<div mat-dialog-content>
My favorite animal is:
<ul>
<li>
<span *ngIf="data.animal === 'panda'">✓</span> Panda
</li>
<li>
<span *ngIf="data.animal === 'unicorn'">✓</span> Unicorn
</li>
<li>
<span *ngIf="data.animal === 'lion'">✓</span> Lion
</li>
</ul>
</div>
I will be very thankful for solve my problem.

I'm not sure if its the true problem but you don't need the #Injectable annotation on the DialogDataExampleDialog since it is already a #Component.
Perhaps try that?

Visit here Angular material dialog sample,
This is based on #moufed's code. (#moufed, thanks for yours)
I just add one line to styles.css. This will show box as you wish.
#import "~#angular/material/prebuilt-themes/deeppurple-amber.css";
Anyway, In case of this, we need to check this "dynamically load a component by type imperatively".
Of course, OP's code is implement number 2,
A component should be "entryComponents" of AppModule (app.module.ts or main.ts)
A component should be "entryComponents" of your module
--> your module should be "imports" of AppModule.
Here is donation.module.ts
#NgModule({
declarations: [DonationsComponent,DialogDataExampleDialog],
imports: [
CommonModule,
exportsModules
],
exports: [DonationsComponent,DialogDataExampleDialog,...exportsModules],
entryComponents: [DialogDataExampleDialog ], // Add component to entryComponents
})
export class DonationsModule { }
Here is app.module.ts
#NgModule({
imports: [
BrowserModule, FormsModule ,BrowserAnimationsModule,
DonationsModule // Should be here your module that contains entryComponents
],
declarations: [ AppComponent, HelloComponent ],
bootstrap: [ AppComponent ]
})
export class AppModule { }
If we need to use some component dynamically with ViewContainerRef or something like that our component should be "entryComponents".

Can't bind to since it isn't a known property of selector component

I want to pass a variable from one component to another and I'm using #input
This is my parent component :
#Component({
selector: 'aze',
templateUrl: './aze.component.html',
styleUrls: [('./aze.component.scss')],
providers: [PaginationConfig],
})
export class azeComponent implements OnInit {
public hellovariable: number = 100;
}
This is the template of the parent component:
<app-my-dialog [hellovariable]="hellovariable"></app-my-dialog>
This is my child component :
#Component({
selector: 'app-my-dialog',
templateUrl: './my-dialog.component.html',
styleUrls: ['./my-dialog.component.css']
})
export class MyDialogComponent implements OnInit {
#Input() hellovariable: number;
constructor() { }
ngOnInit() {
console.log(hellovariable);
}
This is the child template:
<h3>Hello I am {{hellovariable}}<h3>
And this is the app.module.ts:
#NgModule({
declarations: [
AppComponent,
MyDialogComponent
],
entryComponents: [
MyDialogComponent
],
imports: [
BrowserModule,
routing,
NgbModule,
BrowserAnimationsModule,
ToastrModule.forRoot(),
RichTextEditorAllModule,
FullCalendarModule,
NgMultiSelectDropDownModule.forRoot(),
LeafletModule.forRoot(),
NgxGalleryModule,
HttpClientModule,
MatDialogModule,
ReactiveFormsModule
],
When I show my parent component template I get this error:
Can't bind to 'hellovariable' since it isn't a known property of 'app-my-dialog'.
Any idea on how to fix this?

Few thing to try
First make sure you have import Input into your component
import { Component, Input } from '#angular/core';
Then follow pascal convention when naming class
export class azeComponent implements OnInit
should change to
export class AzeComponent implements OnInit
Then register your component into your module declarations
Also import BrowserModule into your module also something like this
import { BrowserModule } from '#angular/platform-browser';
import { NgModule } from '#angular/core';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
#NgModule({
declarations: [
AppComponent,
MyDialogComponent,
AzeComponent
],
imports: [
BrowserModule,
AppRoutingModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }

Mostly you'll get this error because you forgot to declare the component into your app.module.ts or did it wrong
app.module.ts
import { YourSpecificComponent } from './components/measureUnit/measure-unit-monthly/measure-unit-monthly.component';
#NgModule({
declarations: [
AppComponent,
MessageComponent,
DashboardComponent,
.....,
YourSpecificComponent, // declared here
}
your-specific.component.ts
#Component({
selector: 'app-your-specific', // your selector
templateUrl: './your-specific.component.html',
styleUrls: [
'../some.css'
]
})
export class YourSpecificComponent implements AfterContentInit {
.....

ok this error causes because you need to import MyDialogComponent in azeComponent's module.

Angular2 : EXCEPTION: No provider for Angulartics2GoogleAnalytics

I am trying to use angulartics2 with my application.
I have configured correctly as it mentioned in the document.
Note: There is no place it is mentioned to add the provider as a dependency..
When i try to run the application, it shows the error as below.
EXCEPTION: No provider for Angulartics2GoogleAnalytics! Error: DI
Error
at NoProviderError.ZoneAwareError (zone.js:811)
at NoProviderError.BaseError [as constructor] (core.umd.js:1186)
at NoProviderError.AbstractProviderError [as constructor] (core.umd.js:1371)
at new NoProviderError (core.umd.js:1411)
at ReflectiveInjector_.throwOrNull (core.umd.js:3394)
at ReflectiveInjector.getByKeyDefault (core.umd.js:3433)
at ReflectiveInjector.getByKey (core.umd.js:3380)
at ReflectiveInjector.get (core.umd.js:3140)
at AppModuleInjector.NgModuleInjector.get (core.umd.js:8996)
at CompiledTemplate.proxyViewClass.AppView.injectorGet (core.umd.js:12465)
at CompiledTemplate.proxyViewClass.DebugAppView.injectorGet (core.umd.js:12845)
at CompiledTemplate.proxyViewClass.View_AppComponent_Host0.createInternal
(/AppModule/AppComponent/host.ngfactory.js:15)
at CompiledTemplate.proxyViewClass.AppView.createHostView (core.umd.js:12421)
at CompiledTemplate.proxyViewClass.DebugAppView.createHostView (core.umd.js:12829)
at ComponentFactory.create (core.umd.js:7766) 1: https://github.com/angulartics/angulartics2
App.component.ts
import { Component } from '#angular/core';
import { Angulartics2GoogleAnalytics } from 'angulartics2';
#Component({
selector: 'my-app',
moduleId: module.id,
templateUrl: `./app.component.html`,
styleUrls: ['/app.componenet.css']
})
export class AppComponent {
title = 'Angular2 google analytics';
constructor(angulartics2GoogleAnalytics: Angulartics2GoogleAnalytics) {}
}
app.module.ts
import { NgModule } from '#angular/core';
import { BrowserModule } from '#angular/platform-browser';
import { AppComponent } from './app.component';
import { HttpModule } from '#angular/http';
import { FormsModule } from '#angular/forms';
import { Angulartics2Module, Angulartics2GoogleAnalytics } from 'angulartics2';
#NgModule({
imports: [ HttpModule, BrowserModule, FormsModule, Angulartics2Module.forRoot([ Angulartics2GoogleAnalytics ])],
declarations: [ AppComponent ],
bootstrap: [ AppComponent ],
})
export class AppModule { }

use providers to initiate your providers in component.
#Component({
selector: 'yourselector',
styleUrls: [''],
templateUrl: '',
providers: [Angulartics2GoogleAnalytics]
})
Try this.

Your problem should reside in your constructor:
constructor(angulartics2GoogleAnalytics: Angulartics2GoogleAnalytics) {}
you should add e.g public in front of your provider:
constructor(public angulartics2GoogleAnalytics: Angulartics2GoogleAnalytics) {}