Question

Checkall checkboxes and at least one checkbox checked angular 2

Answer 1

I want to do validation for checkboxes here without form tag. At least one checkbox should be selected.

for other field I will put required and do the error|touched|valid etc. but since checkbox is not single input, I cannot put required in every checkbox because all checkbox will be compulsory to checked. so how do I do the validation to alert user atleast one should be checked .