@Ionic/Angular 4.0.0 Angular forms validation status class updates not working (ng-*** != ion-***)

Bug Report

Ionic version:

4.0.0

Current behavior: Using the Angular Reactive Forms API, when markAsTouched() function is called over a FormControl, ng-touched class is applied to the ion-item element but the ion-touched class is not applied.

This problem occurs with each of the Angular Forms markAs*** functions:

• markAsTouched
• markAsUntouched
• markAsDirty
• markAsPristine
• markAsPending

(Didn’t take the time to test the reset function, but I suspect that the result will be the same.)

Expected behavior: Whenever an Angular FormControl status changes ng-XXX classes applied to the DOM element are updated. ion-XXX classes should work the same way. On every FormControl status change, ion-XXX classes should also be updated.

Steps to reproduce:

1. Change the status of a FormControl using the Angular Forms markAsXXX functions.
2. Inspect the DOM and check the ng-XXX and ion-XXX classes applied to the corresponding ion-item.
3. ng-XXX classes are applied, ion-XXX classes don’t

Related code:

Other information:

Ionic info:

Ionic:

   ionic (Ionic CLI)             : 4.10.2 (D:\Users\****\AppData\Roaming\npm\node_modules\ionic)
   Ionic Framework               : @ionic/angular 4.0.0
   @angular-devkit/build-angular : 0.10.7
   @angular-devkit/schematics    : 7.2.3
   @angular/cli                  : 7.2.3
   @ionic/angular-toolkit        : not installed

[Corneel-D]

This problem also occurs for the setErrors() function. ng-valid/ng-invalid is set correspondingly, but the corresponding ionic ion-valid/ion-invalid class is not changing.

[nickwinger]

How can it be that after 1 year there is no response from Ionic-Team ?? This is a major issue, form validation is completely not in sync with angular and the framework is useless ? When you have a (reactive) angular form and the user presses Submit, not errors are shown, validation is not working. Don’t you think form validation is a key concept in nearly every App ?? I really don’t get, there is not even a usefull documentation on forms on the Ionic Homepage. I don’t understand how you guys can continue working on new versions without providing a framework that has the basic functionality in it…