NgControlStatusGroup
directive
Directive automatically applied to Angular form groups that sets CSS classes based on control status (valid/invalid/dirty/etc).
See also
NgModules
Selectors
[formGroupName][formArrayName][ngModelGroup][formGroup]form:not([ngNoForm])[ngForm]
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Licensed under the Creative Commons Attribution License 4.0.
https://v8.angular.io/api/forms/NgControlStatusGroup