Sync Values from Inputs with Angular 2’s ngModel Two-Way Binding

InstructorJohn Lindquist

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Two-way binding still exists in Angular 2 and ngModel makes it simple. The syntax is a combination of the [input] and (output) syntax to represent that the data is being pushed out and pulled in.

Eugene Cook
~ 7 years ago

Not sure if I missed it, but you have to import FormsModule for ngModel to work.

james
~ 7 years ago

Hey Eugene, you didn't miss it. It's not in the video.

For anyone else reading this, here is what I did to get it to work: in my app.module.ts file, near the top, I added: import { FormsModule } from '@angular/forms';

and further down in the file, in the NgModule annotation, in the array value for imports, I added FormsModule.

The final file looks like this: import { BrowserModule } from '@angular/platform-browser'; import { NgModule } from '@angular/core'; import { FormsModule } from '@angular/forms';

import { AppComponent } from './app.component'; import { SimpleFormComponent } from './simple-form/simple-form.component'; import { MailService } from './mail.service'

@NgModule({ declarations: [ AppComponent, SimpleFormComponent ], imports: [ BrowserModule, FormsModule ], providers: [ { provide: 'mail', useClass: MailService }, { provide: 'api', useValue: 'http://localhost:3000'} ], bootstrap: [AppComponent] }) export class AppModule { }

Alexandre Cuva
~ 7 years ago

Can we get an update on what we should do now, it doesn't work at all:

@Component({ selector: 'app-simple-form', template: `<div> {{message}} <input #myInput type="text" [(ngModule)]="message"> <button (click)="onClick($event, myInput.value);">Click me</button>

</div> `, styles: [] })
Tyler Andor
~ 7 years ago

It's updated in the code but not the video. Definitely need an update to the video here for adding to app.module.ts:

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

...and adding FormsModule to the imports array.

Jake Sullivan
~ 6 years ago

I added multiple imports in app.module.ts

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

also add the new imports below in app.module.ts

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

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