How to Fix Can’t bind to ‘formGroup’ since it isn’t a known property of ‘form’

Can’t bind to ‘formGroup’ since it isn’t a known property of ‘form’ error typically occurs when using “Angular’s Reactive Forms module but forgot to import the ReactiveFormsModule in the app.module.ts file.”

Here are the reasons and solutions to fix the error.

‘ReactiveFormsModule’ is not imported

Ensure you have imported ReactiveFormsModule in your app.module.ts file.

import { ReactiveFormsModule } from '@angular/forms';

@NgModule({
  declarations: [
    // your components here
  ],
  imports: [
  ReactiveFormsModule,
    // other modules here
  ],
  providers: [],
  bootstrap: [AppComponent]
})

export class AppModule { }

Typographical Error

Make sure that there is no typo in your template. The directive should be written as formGroup, not FormGroup or Formgroup.

<form [formGroup]="myFormGroup"> 

     <!-- form controls here --> 

</form>

Use the correct element

The formGroup directive is typically used on a <form> tag. Ensure you’re not accidentally trying to bind it to another kind of element.

Component Class Setup

Make sure you’ve set up your form group correctly in your component class.

import { FormBuilder, FormGroup } from '@angular/forms';

export class YourComponent implements OnInit {
  myFormGroup: FormGroup;

  constructor(private fb: FormBuilder) { }

  ngOnInit() {
    this.myFormGroup = this.fb.group({
    // your controls here
  });
 }
}

Appropriate Module Import

If you are working with feature or lazy-loaded modules, ensure that the ReactiveFormsModule is imported into the specific module where you’re trying to use the formGroup directive.

Avoid Duplicate Declarations

Ensure that components are declared in only one module. Declaring a component in more than one module can lead to unexpected behavior.

If you’ve checked all these points and are still facing the issue, you may want to provide more details or code snippets so I can assist you further.

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