by Sai gowtham

Can't bind to formGroup since it isn't a known property of form

In angular, we’ll get this type of errors if we forgot to add FormsModule inside our app.module.ts file and trying to use form properties inside components.

We can solve this problem by importing the FormsModule and ReactiveFormsModule from @angular/forms package and added it to the imports array inside your app.module.ts file.

app.module.ts
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

@NgModule({
  declarations: [
    AppComponent,
    ChildComponent
  ],
  imports: [
    BrowserModule, FormsModule, ReactiveFormsModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

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