Which @angular/* package(s) are relevant/related to the feature request?

forms

Description

Currently, using Validators.required, Validators.minLength and Validators.maxLength validators don't work with sets. This is because a set has a size property instead of a length property.

Proposed solution

Validators.required, Validators.minLength and Validators.maxLength validators should work with sets.

Example:

const control = new FormControl(new Set(), [Validators.required])

PR

I already created a PR which in my eyes solved the issue: #45793 (PR has been closed).