RadioControlValueAccessor
From Get docs
< @angular/formsAngular/docs/11/api/forms/radiocontrolvalueaccessor
RadioControlValueAccessor
directive
The ControlValueAccessor
for writing radio control values and listening to radio control changes. The value accessor is used by the FormControlDirective
, FormControlName
, and NgModel
directives.
Exported from
-
ReactiveFormsModule
-
FormsModule
Selectors
input[type=radio][formControlName]
input[type=radio][formControl]
input[type=radio][ngModel]
Properties
Property | Description |
---|---|
@Input()name: string
|
Tracks the name of the radio input element. |
@Input()formControlName: string
|
Tracks the name of the FormControl bound to the directive. The name corresponds to a key in the parent FormGroup or FormArray .
|
@Input()value: any
|
Tracks the value of the radio input element |
Description
Using radio buttons with reactive form directives
The follow example shows how to use radio buttons in a reactive form. When using radio buttons in a reactive form, radio buttons in the same group should have the same formControlName
. Providing a name
attribute is optional.
import {Component} from '@angular/core';
import {FormControl, FormGroup} from '@angular/forms';
@Component({
selector: 'example-app',
template: `
<form [formGroup]="form">
<input type="radio" formControlName="food" value="beef" > Beef
<input type="radio" formControlName="food" value="lamb"> Lamb
<input type="radio" formControlName="food" value="fish"> Fish
</form>
<p>Form value: {{ form.value | json }}</p> <!-- {food: 'lamb' } -->
`,
})
export class ReactiveRadioButtonComp {
form = new FormGroup({
food: new FormControl('lamb'),
});
}
Methods
fireUncheck() | |||
---|---|---|---|
Sets the "value" on the radio input element and unchecks it. | |||
fireUncheck(value: any): voidParameters
Returns
|
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Licensed under the Creative Commons Attribution License 4.0.
https://v11.angular.io/api/forms/RadioControlValueAccessor