Error in displaying dialogues upon clicking

Currently experimenting with creating a dialog modal using the tutorial found at https://github.com/gopinav/Angular-Material-Tutorial/tree/master/material-demo/src/app, specifically referring to the dialog-example and dialog folder.

However, upon testing it on my localhost, I encountered the following error:

No component factory found for ModalComponent. Have you included it in @NgModule.entryComponents?

I have divided the code as follows:

nav.html

<nav class="navbar navbar-expand-lg navbar-light bg-light">
    // Code snippet here
</nav>

nav.ts

// Code snippet here

And for the modal:

modal.html

// Code snippet here

modal.ts

// Code snippet here

Is there something that I may have overlooked which is causing this error message to appear?

angulartypescriptangular-materialmaterial-dialog

Answer №1

It appears that you may have overlooked adding the entryComponents and declarations arrays in the app.module.ts file. Please make sure to include them. The material alert will open automatically.

let dialogRef = this.dialog.open(ModalComponent)

You do not need to open this again inside the component.

import {ModalService} from './Components/ModalService.component';
declarations: [
.
.
.,
ModalService
],
entryComponents: [
.
.
.,
ModalService
]

Additionally, avoid using the mat-dialog-close attribute in buttons. Instead, add click functions if there are operations to perform before closing the modal. You can achieve this with the following code:

<mat-dialog-actions>
   <button mat-button (click)="keepLoggedIn()">Keep me logged in</button>
   <button mat-button (click)="logout()">Log out</button>
</mat-dialog-actions>

logout() {
  this.dialogRef.close({data:[], status: 'success'});
}

keepLoggedIn() {
  this.dialogRef.close({data:[], status: 'success'});
}

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