The module 'AppModule' is throwing an error with the import of 'MatDialogRef' which is causing unexpected value. To resolve this issue, make sure to include a @

I am currently facing an issue while trying to incorporate Angular Material into my Angular project. Despite successful compilation of the program, I encounter an error when running it in the browser.

Uncaught Error: Unexpected value 'MatDialogRef' imported by the module 'AppModule'. Please add a @NgModule annotation.
    at syntaxError (compiler.js:485)
    at eval (compiler.js:15226)
    at Array.forEach (<anonymous>)
    at CompileMetadataResolver.getNgModuleMetadata (compiler.js:15201)
    at JitCompiler._loadModules (compiler.js:34385)
    at JitCompiler._compileModuleAndComponents (compiler.js:34346)
    at JitCompiler.compileModuleAsync (compiler.js:34240)
    at CompilerImpl.compileModuleAsync (platform-browser-dynamic.js:239)
    at PlatformRef.bootstrapModule (core.js:5551)
    at eval (main.ts:11)

In my app.module.ts file, I have imported MatDialogRef as shown below:

import { MatDialogModule, MatDialogRef } from '@angular/material/dialog';

imports: [
    BrowserModule,
    FormsModule,
    BrowserAnimationsModule,
    MatButtonModule,
    MatDialogModule,
    MatDialogRef,
    ReactiveFormsModule,
    HttpModule,
    HttpClientModule,
    AppRoutingModule
  ],

Additionally, I have included the import statement for MatDialogRef in the component where the dialog HTML is stored:

import { MatDialogRef, MAT_DIALOG_DATA } from '@angular/material';

Here is an excerpt from the code in the component:

export class ComposeMailComponent implements OnInit {
constructor(private dialogRef: MatDialogRef<ComposeMailComponent>, 
      @Inject(MAT_DIALOG_DATA) private data) {}
  
  ngOnInit() {
  }
}

Answer №1

When updating your app.module.ts file, remember that you no longer require importing MatDialogRef.

Instead of:

import { MatDialogModule, MatDialogRef } from '@angular/material/dialog';

Use:

import { MatDialogModule} from '@angular/material';

Furthermore, make sure to eliminate MatDialogRef from the imports array.

Answer №2

To include these components, make sure to add them in your app.module.ts file.

import { MatCheckboxModule } from '@angular/material/checkbox';

Then inside the imports array, include MatCheckboxModule as shown below:

imports: [ MatCheckboxModule ],

This step is necessary for everything to work smoothly.

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