[javascript] Can't bind to 'ngModel' since it isn't a known property of 'input'

I've got the following error when launching my Angular app, even if the component is not displayed.

I have to comment out the <input> so that my app works.

zone.js:461 Unhandled Promise rejection: Template parse errors:
Can't bind to 'ngModel' since it isn't a known property of 'input'. ("
   <div>
      <label>Created:</label>
      <input  type="text" [ERROR ->][(ngModel)]="test" placeholder="foo" />
   </div>
</div>"): InterventionDetails@4:28 ; Zone: <root> ; Task: Promise.then ; Value: 

I'm looking at the Hero plunker, but I don't see any difference from my code.

Here is the component file:

import { Component, EventEmitter, Input, OnInit, Output } from '@angular/core';
import { Intervention } from '../../model/intervention';

@Component({
   selector: 'intervention-details',
   templateUrl: 'app/intervention/details/intervention.details.html',
   styleUrls: ['app/intervention/details/intervention.details.css']
})

export class InterventionDetails
{
   @Input() intervention: Intervention;

   public test : string = "toto";
}

Import FormModule in file app.module

import { FormsModule } from '@angular/forms'; [...] @NgModule({ imports: [ [...] FormsModule ], [...] })

The YouTube video "Angular error can't bind to 'ngModel' since it isn't a known property of input" explains how to solve this practically. Below goes the textual explanation of the same.

Angular error “Can't bind to 'ngModel' since it isn't a known property of 'input'”

A simple translation of the above error message is that the "ngModel" directive is not understood and the necessary Angular modules needs to be loaded so that the syntax works.

For "ngModel" directive to work inside HTML we need to import "FormModules" from "@Angular/forms".Below is one more similar kind of error, but related to "FormsGroup". In the below case we should load ReactiveFormsModule.

Template parse errors:Can't bind to 'formGroup' since it isn't a known property of 'form'.

A small tip when you get an error such as above: you can hunt for the "[Error-->]" text, and the arrow points towards the directive which is not understood by Angular.

Main reason of this error is you forget to import FormsModule in your app.module.ts.

But sometimes in big projects you may forget add your component in its module and confront this error.

If you need to use [(ngModel)] first, you need to import FormsModule in app.module.ts and then add in a list of imports. Something like this:

File app.module.ts

1. import import {FormsModule} from "@angular/forms";
2. add in imports imports: [ BrowserModule, FormsModule ],

File app.component.ts

1. Example: <input type="text" [(ngModel)]="name" >
2. and then <h1>your name is: {{name}} </h1>

In ngModule you need to import FormsModule, because ngModel is coming from FormsModule. Please modify your app.module.ts like the below code I have shared

import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';

@NgModule({
    declarations: [
         AppComponent,
         HomeComponent
    ],
    imports: [
         BrowserModule,
         AppRoutingModule,
         FormsModule
    ],
    bootstrap: [AppComponent]
})
export class AppModule { }

When I first did the tutorial, main.ts looked slightly different from what it is now. It looks very similar, but note the differences (the top one is correct).

Correct:

import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { AppModule } from './app.module';

platformBrowserDynamic().bootstrapModule(AppModule);

Old tutorial code:

import { bootstrap }    from '@angular/platform-browser-dynamic';
import { AppComponent } from './app.component';
bootstrap(AppComponent);

I am using Angular 9 and I have a '<form' tag with the [formGroup] property. I also had an '<input' tag specifying a button, which caused the error on the [(ngModel)] part.

I resolved the error by just removing only that (ngModel) part.

Sometimes you get this error when you try to use a component from a module, which is not shared, in a different module.

For example, you have 2 modules with module1.componentA.component.ts and module2.componentC.component.ts and you try to use the selector from module1.componentA.component.ts in a template inside module2 (e.g. <module1-componentA [someInputVariableInModule1]="variableFromHTTPRequestInModule2">), it will throw the error that the someInputVariableInModule1 is not available inside module1.componentA.component.ts - even though you have the @Input() someInputVariableInModule1 in the module1.componentA.

If this happens, you want to share the module1.componentA to be accessible in other modules. So if you share the module1.componentA inside a sharedModule, the module1.componentA will be usable inside other modules (outside from module1), and every module importing the sharedModule will be able to access the selector in their templates injecting the @Input() declared variable.

In order to be able to use two-way data binding for form inputs you need to import the FormsModule package in your Angular module.

For more information, see the Angular 2 official tutorial here and the official documentation for forms.

You need to import the FormsModule

Open app.module.ts

and add line

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

and

@NgModule({
imports: [
   FormsModule
],
})

For my scenario, I had to import both [CommonModule] and [FormsModule] to my module

import { NgModule } from '@angular/core' 
import { CommonModule } from '@angular/common'; 
import { FormsModule } from '@angular/forms'; 

import { MyComponent } from './mycomponent'

@NgModule({
    imports: [
        CommonModule,
        FormsModule
    ],
    declarations: [
        MyComponent 
    ]
 }) 
export class MyModule { }

I'm using Angular 5.

In my case, I needed to import ReactiveFormsModule too.

File app.module.ts (or anymodule.module.ts):

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

@NgModule({
  imports: [
    CommonModule,
    FormsModule,
    ReactiveFormsModule
  ],

ngModel is coming from FormsModule. There are some cases when you can receive this kind of error:

1. You didn't import the FormsModule into the import array of modules where your component is declared - the component in which the ngModel is used.
2. You have import the FormsModule into one module which is inherited of another module. In this case you have two options:

• let the FormsModule be imported into the import array from both modules:module1 and module2. As the rule: Importing a module does not provide access to its imported modules. (Imports are not inherited)

  

• declare the FormsModule into the import and export arrays in module1 to be able to see it in model2 also

  

3. (In some version I faced this problem) You have imported the FormsModule correctly, but the problem is on the input HTML tag. You must add the name tag attribute for the input, and the object bound name in [(ngModel)] must be the same as the name into the name attribute

   

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

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

For using [(ngModel)] in Angular 2, 4 & 5+, you need to import FormsModule from Angular form...

Also, it is in this path under forms in the Angular repository on GitHub:

angular / packages / forms / src / directives / ng_model.ts

Probably this is not a very pleasurable for the AngularJS developers as you could use ng-model everywhere anytime before, but as Angular tries to separate modules to use whatever you'd like you to want to use at the time, ngModel is in FormsModule now.

Also, if you are using ReactiveFormsModule it needs to import it too.

So simply look for app.module.ts and make sure you have FormsModule imported in...

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';  // <<<< import it here
import { AppComponent } from './app.component';

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule, FormsModule // <<<< And here
  ],
  providers: [],
  bootstrap: [AppComponent]
})

export class AppModule { }

Also, these are the current starting comments for Angular4 ngModel in FormsModule:

/**
 * `ngModel` forces an additional change detection run when its inputs change:
 * E.g.:
 * ```
 * <div>{{myModel.valid}}</div>
 * <input [(ngModel)]="myValue" #myModel="ngModel">
 * ```
 * I.e. `ngModel` can export itself on the element and then be used in the template.
 * Normally, this would result in expressions before the `input` that use the exported directive
 * to have and old value as they have been
 * dirty checked before. As this is a very common case for `ngModel`, we added this second change
 * detection run.
 *
 * Notes:
 * - this is just one extra run no matter how many `ngModel` have been changed.
 * - this is a general problem when using `exportAs` for directives!
 */

If you'd like to use your input, not in a form, you can use it with ngModelOptions and make standalone true...

[ngModelOptions]="{standalone: true}"

For more information, look at ng_model in the Angular section here.

Though the answer solves the issue, I would like to provide a little more information on this topic as I have also undergone this issue when I started to work on Angular projects.

A beginner should understand that there are two main types of forms. They are Reactive forms and Template-driven forms. From Angular 2 onward, it is recommended to use Reactive forms for any kind of forms.

Reactive forms are more robust: they're more scalable, reusable, and testable. If forms are a key part of your application, or you're already using reactive patterns for building your application, use reactive forms.

Template-driven forms are useful for adding a simple form to an application, such as an email list signup form. They're easy to add to an application, but they don't scale as well as reactive forms. If you have very basic form requirements and logic that can be managed solely in the template, use template-driven forms.

Refer Angular documents for more details.

Coming to the question, [(ngModel)]="..." is basically a binding syntax. In order to use this in your component HTML page, you should import FormsModule in your NgModule (where your component is present). Now [(ngModel)] is used for a simple two-way binding or this is used in your form for any input HTML element.

On the other hand, to use reactive forms, import ReactiveFormsModule from the @angular/forms package and add it to your NgModule's imports array.

For example, if my component HTML content does not have [(ngmodel)] in any HTML element, then I don't need to import FormsModule.

In my below example, I have completely used Reactive Forms and hence I don't need to use FormsModule in my NgModule.

Create GroupsModule:

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { GroupsRoutingModule, routedAccountComponents } from './groups-routing.module';
import { ReactiveFormsModule } from '@angular/forms';
import { SharedModule } from '../shared/shared.module';
import { ModalModule } from 'ngx-bootstrap';
@NgModule({
    declarations: [
        routedAccountComponents
    ],
    imports: [
        CommonModule,
        ReactiveFormsModule,
        GroupsRoutingModule,
        SharedModule,
        ModalModule.forRoot()
    ]
})
export class GroupsModule {
}

Create the routing module (separated to main the code and for readability):

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { GroupsComponent } from './all/index.component';
import { CreateGroupComponent } from './create/index.component';

const routes: Routes = [
  {
    path: '',
    redirectTo: 'groups',
    pathMatch: 'full'
  },
  {
    path: 'groups',
    component: GroupsComponent
  }
];


@NgModule({
  imports: [RouterModule.forChild(routes)],
  exports: [RouterModule]
})
export class GroupsRoutingModule { }


export const routedAccountComponents = [
  GroupsComponent,
  CreateGroupComponent
];

CreateGroupComponent html code

<form [formGroup]="form" (ngSubmit)="onSubmit()">
        <label for="name">Group Name</label>
        <div class="form-group">
            <div class="form-line">
                <input type="text" formControlName="name" class="form-control">
            </div>
        </div>
    </form>

CreateGroupComponent ts file

import { Component, OnInit, Output, EventEmitter } from '@angular/core';
import { DialogResult } from 'src/app/shared/modal';
import { FormGroup, FormControl, AbstractControl } from '@angular/forms';
import { Subject } from 'rxjs';
import { ToastrService } from 'ngx-toastr';
import { validateAllFormFields } from 'src/app/services/validateAllFormFields';
import { HttpErrorResponse } from '@angular/common/http';
import { modelStateFormMapper } from 'src/app/services/shared/modelStateFormMapper';
import { GroupsService } from '../groups.service';
import { CreateGroup } from '../model/create-group.model';

@Component({
    selector: 'app-create-group',
    templateUrl: './index.component.html',
    providers: [LoadingService]
})

export class CreateGroupComponent implements OnInit {
    public form: FormGroup;
    public errors: string[] = [];
    private destroy: Subject<void> = new Subject<void>();

    constructor(
        private groupService: GroupsService,
        private toastr: ToastrService
    ) { }

    private buildForm(): FormGroup {
        return new FormGroup({
            name: new FormControl('', [Validators.maxLength(254)])
        });
    }

    private getModel(): CreateGroup {
        const formValue = this.form.value;
        return <CreateGroup>{
            name: formValue.name
        };
    }

    public control(name: string): AbstractControl {
        return this.form.get(name);
    }

    public ngOnInit() {
        this.form = this.buildForm();
    }


    public onSubmit(): void {

         if (this.form.valid) {
             // this.onSubmit();
             //do what you need to do
         }
    }
}

I hope this helps developers to understand as to why and when you need to use FormsModule.

If someone is still getting errors after applying the accepted solution, it could be possibly because you have a separate module file for the component in which you want to use the ngModel property in input tag. In that case, apply the accepted solution in the component's module.ts file as well.

There are two steps you need to follow to get rid of this error:

1. import FormsModule in your app module
2. Pass it as value of imports in @NgModule decorator

Basically, file app.module.ts should look like below:

    import { NgModule }      from '@angular/core';
    import { BrowserModule } from '@angular/platform-browser';
    import { FormsModule }   from '@angular/forms';
    import { AppComponent }  from './app.component';
    import {AppChildComponent} from './appchild.component';
    @NgModule({
      imports:      [ BrowserModule,FormsModule ],
      declarations: [ AppComponent, AppChildComponent ],
      bootstrap:    [ AppComponent ]
    })
    export class AppModule { }

You need to import the FormsModule.

Open app.module.ts and add the lines

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

and

@NgModule({
    imports: [
       FormsModule
    ],
})

For any version from Angular 2, you need to import FormsModule in your app.module.ts file and it will fix the issue.

Recently I found that mistake happened not only in case when you forgot to import FormsModule in your module. In my case problem was in this code:

<input type="text" class="form-control" id="firstName"
                   formControlName="firstName" placeholder="Enter First Name"
                   value={{user.firstName}} [(ngModel)]="user.firstName">

I fix it with change formControlName -> name

<input type="text" class="form-control" id="firstName"
                   name="firstName" placeholder="Enter First Name"
                   value={{user.firstName}} [(ngModel)]="user.firstName">

Simple solution: In file app.module.ts -

Example 1

import {FormsModule} from "@angular/forms";
// Add in imports

imports: [
 BrowserModule,
 FormsModule
 ],

Example 2

If you want to use [(ngModel)] then you have to import FormsModule in app.module.ts:

import { FormsModule  } from "@angular/forms";
@NgModule({
  declarations: [
    AppComponent, videoComponent, tagDirective,
  ],
  imports: [
    BrowserModule,  FormsModule

  ],
  providers: [ApiServices],
  bootstrap: [AppComponent]
})
export class AppModule { }

ngModel should be imported from @angular/forms because it is the part of FormsModule. So I advice you to change your app.module.ts in something like this:

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

[...]

@NgModule({
  imports: [
    [...]
    FormsModule
  ],
  [...]
})

I upgraded from RC1 to RC5 and received this error.

I completed my migration (introducing a new app.module.ts file, changing package.json to include new versions and missing modules, and finally changing my main.ts to boot accordingly, based on the Angular2 quick start example).

I did an npm update and then an npm outdated to confirm the versions installed were correct, still no luck.

I ended up completely wiping the node_modules folder and reinstalling with npm install - Voila! Problem solved.

I am using Angular 7.

I have to import ReactiveFormsModule, because I am using the FormBuilder class to create a reactive form.

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

@NgModule({
  imports: [
    CommonModule,
    FormsModule,
    ReactiveFormsModule
  ], declarations: []})

You need to import FormsModule in your root module if this component is in the root i.e. app.module.ts

Kindly open app.module.ts

Import FormsModule from @angular/forms

Ex:

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

and

@NgModule({
imports: [
   FormsModule
],
})

Assuming you have created a new NgModule, say AuthModule dedicated to handling your authentication needs, make sure to import FormsModule in that AuthModule too.

If you'll be using the FormsModule only in the AuthModule then you wouldn't need to import the FormModule in the default AppModule.

So something like this in the AuthModule:

import { NgModule }      from '@angular/core';
import { FormsModule } from '@angular/forms';

import { authRouting } from './auth.routing';
import { LoginComponent, SignupComponent } from './auth.component';

@NgModule({
  imports:      [
    authRouting,
    FormsModule
   ],
  declarations: [
    SignupComponent,
    LoginComponent
  ]
})
export class AuthModule { }

Then forget about importing in AppModule if you don't use the FormsModule anywhere else.

Import FormsModule in you app module.

It would let your application run well.

import { NgModule }      from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import {ContactListCopmponent} from './contacts/contact-list.component';
import { FormsModule }   from '@angular/forms';

import { AppComponent }  from './app.component';

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

I know this question is about Angular 2, but I am on Angular 4 and none of these answers helped.

In Angular 4 the syntax needs to be

[(ngModel)]

This error will happen too even if the FormsModule is imported directly or indirectly (from a shared module for example) in the feature module, if the imported component is not declared on declarations:

I followed Deborah Kurata's Angular Routing course. While I added the imported component ProductEditInfoComponent on Angular Route's component property, I forgot to add ProductEditInfoComponent on declarations property.

Adding the ProductEditInfoComponent on the declarations property would solve the NG8002: Can't bind to 'ngModel' since it isn't a known property of 'input'. problem:

ngModel is the part of FormsModule. And it should be imported from @angular/forms to work with ngModel.

Please change the app.module.ts as follow:

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

[...]

@NgModule({
  imports: [
    [...]
    FormsModule
  ],
  [...]
})

I was getting the same error when running my Angular tests because FormsModule was not added in the specification file.

We need to add it in all specification files whereas for the application to run successfully we will add at one place in the app.module.ts file.

If you are still getting the error after importing FormsModule correctly then check in your terminal or (windows console) because your project is not compiling (because of another error that could be anything) and your solution has not been reflected in your browser!

In my case, my console had the following unrelated error:

Property 'retrieveGithubUser' does not exist on type 'ApiService'.

Sometimes, even though we are already imported BrowserModule, FormsModule and other related modules, we still may get the same error.

Then I realized that we need to import them in order, which is missed in my case. So the order should be like BrowserModule, FormsModule, and ReactiveFormsModule.

As per my understanding, feature modules should follow the basic modules of Angular.

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

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

In the module you are willing to use ngModel you have to import FormsModule

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

@NgModule({
  imports: [
    FormsModule,
  ],

})
export class AbcModule { }

I faced the same problem and the reason was that I was using ngModel in my MenuComponent. I imported my MenuComponent in app.module.ts, but I forgot to declare it.

Declaring the MenuComponent solved my issue. I.e., as shown in the below image:

For me the issue was, I forgot to declare the component in the declarations array of the module.

@NgModule({
 declarations: [yourcomponentName]
})

Note: Remember that the ngModel directive is defined as a part of Angular FormsModule and you need to include FormsModule in the imports: [...] section of the Angular module metadata, in which you want to use it.

Import the FormsModule in those modules where you want to use the [(ngModel)]

This is for the folks who use plain JavaScript instead of Type Script. In addition to referencing the forms script file on top of the page like below:

<script src="node_modules/@angular/forms/bundles/forms.umd.js"></script>

You should also tell the the module loader to load the ng.forms.FormsModule. After making the changes my imports property of NgModule method looked like below:

imports: [ng.platformBrowser.BrowserModule, ng.forms.FormsModule],