If the validator is bound to be `null` then no validation occurs and attribute is not added to DOM. For every validator type different PR will be raised as discussed in https://github.com/angular/angular/pull/42378. Closes #42267. PR Close #42565
If the validator is bound to be `null` then no validation occurs and attribute is not added to DOM. For every validator type different PR will be raised as discussed in https://github.com/angular/angular/pull/42378. Closes #42267. PR Close #42565