forms: update required validator when input is autofilled

🚀 feature request

Relevant Package

This feature request is for @angular/forms

Description

The RequiredValidator does not update its validation status when an input is autofilled in Chrome. This is problematic for users who set up a required username and password input and then conditionally enable the submit button when the inputs are valid. The user sees:

1. Page loads
2. Inputs are autofilled with username and password
3. Submit button is still disabled.

This issue has been filed in the past on the components repo: https://github.com/angular/components/issues/3414, though the change would really have to happen in @angular/forms.

Describe the solution you’d like

@angular/cdk has an AutofillMonitor that could be moved to @angular/forms and used to detect when an input is autofilled.

Describe alternatives you’ve considered

It is possible to monkey patch a solution, as @kherock demonstrated on the components issue.

[mrmokwa]

Why is it marked as feature? IMO it’s a bug and shouldn’t need votes to fix it.

[f1ght4fun]

Nothing is helping. No matter whether u have a form or u use ngModel, whether u put all these directives floating around internet posts with autofillmonitor or with directives to react on input change. UNLESS you really tap ie focus/touch input - value does not appear. Mind you i have everything setup - associated domains, webcredentials etc