fr(MatStepper): No notification mechanism on step interacted without a step change. #19918
Description
Reproduction
- Given a linear stepper, with steps associated to forms.
- Have step 1 with an invalid state (which would prevent navigating to step 2)
- Click on header 2.
Expected Behavior
A SelectionChange event to be fired, saying step 1 was selected (from step 1 before, yes)
Actual Behavior
Nothing happened
Why
By clicking on the next step, but being denied, then the step is marked as “interacted”, which causes the formFields’s errorStateMatcher start emitting true, making field “red”. This is nice user experience.
HOWEVER, my Steps are actually implemented by components, and they have ChangeDetectionStrategy.OnPush. The issue I have is I have NO WAY to notify my component of the event, and tell it to refresh it’s form’s states.
Might be related to #18080
Environment
- Angular: 10.0.1