RequiredValidator
A directive that adds the required validator to any controls marked with the
required attribute. The directive is provided with the NG_VALIDATORS multi-provider list.
See also
NgModules
Selectors
:not([type=checkbox])[required][formControlName]:not([type=checkbox])[required][formControl]:not([type=checkbox])[required][ngModel]
Properties
| Property | Description |
|---|---|
@Input()
|
Tracks changes to the required attribute bound to this directive. |
Description
Adding a required validator using template-driven forms
<input name="fullName" ngModel required>
Methods
|
Method that validates whether the control is empty. Returns the validation result if enabled, otherwise null. |
|||
Parameters
Returns
|
|
Registers a callback function to call when the validator inputs change. |