feat(forms): add novalidate by default (#13092)

modules/@angular/forms/src/directives.ts

@@ -14,6 +14,7 @@ import {NgControlStatus, NgControlStatusGroup} from './directives/ng_control_sta
 import {NgForm} from './directives/ng_form';
 import {NgModel} from './directives/ng_model';
 import {NgModelGroup} from './directives/ng_model_group';
+import {NgNovalidate} from './directives/ng_novalidate_directive';
 import {NumberValueAccessor} from './directives/number_value_accessor';
 import {RadioControlValueAccessor} from './directives/radio_control_value_accessor';
 import {RangeValueAccessor} from './directives/range_value_accessor';
@@ -47,7 +48,7 @@ export {MaxLengthValidator, MinLengthValidator, PatternValidator, RequiredValida
 export const SHARED_FORM_DIRECTIVES: Type<any>[] = [
   NgSelectOption, NgSelectMultipleOption, DefaultValueAccessor, NumberValueAccessor,
   RangeValueAccessor, CheckboxControlValueAccessor, SelectControlValueAccessor,
-  SelectMultipleControlValueAccessor, RadioControlValueAccessor, NgControlStatus,
+  SelectMultipleControlValueAccessor, RadioControlValueAccessor, NgControlStatus, NgNovalidate,
   NgControlStatusGroup, RequiredValidator, MinLengthValidator, MaxLengthValidator, PatternValidator
 ];
 

modules/@angular/forms/src/directives/ng_novalidate_directive.ts

@@ -0,0 +1,16 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import {Directive} from '@angular/core';
+
+@Directive({
+  selector: 'form:not([ngNoForm])',
+  host: {'novalidate': ''},
+})
+export class NgNovalidate {
+}