Angular ReactiveForms: Producing an array of checkbox values?

Question

Given a list of checkboxes bound to the same formControlName, how can I produce an array of checkbox values bound to the formControl, rather than s

Answer 1

Related answer to @nash11, here's how you would produce an array of checkbox values

AND

have a checkbox that also selectsAll the checkboxes:

https://stackblitz.com/edit/angular-checkbox-custom-value-with-selectall