core.js:5873 ERROR Error: NodeInjector: NOT_FOUND [ControlContainer]
Sometimes when I restart the project it runs perfectly. There are only changes in app.component.html :
<div class="container">
<div class="row">
<div class="col-md-4">
<form action="">
<div class="form-group">
<label for="">Username</label>
<input type="text" name="username" class="form-control" />
</div>
<div class="form-group">
<label>Password</label>
<input type="password" class="form-control">
</div>
<div class="form-group">
<label>Confirm Password</label>
<input type="password" class="form-control">
</div>
<div>
<button type="submit" class="btn btn-primary btn-block">Register</button>
</div>
</form>
</div>
</div>
</div>
In app.module.ts
I add ReactiveFormsModule
in my imports
section. Remember to import it at the top as: import { ReactiveFormsModule} from '@angular/forms
.
In your app.component.ts
you have to define FormGroup
instance and initialize/register it via ngOnInit
method as below:
import { FormGroup, FormControl } from '@angular/forms'; //imports
.......................................................................
myForm:FormGroup;
ngOnInit(){
this.myForm = new FormGroup({
'name':new FormControl(null), //note, can have up to 3 Constructor Params: default value, validators, AsyncValidators
'email':new FormControl(null,Validators.email)
})
}
Then bind form to the FormGroup
instance myForm
:
<form [formGroup]="myForm">
Note that name
and email
are controls in the form that needs binding using formControlName
:
<input type="text" name="name" formControlName="name">
you have to import both,
import { FormsModule } from '@angular/forms';
import { ReactiveFormsModule } from '@angular/forms';
into your corresponding module.ts file. that worked for me.
In your code formGroup is missing try this:
<form [formGroup] = "">
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With