I have an angular application with a form using formbuilder. I added a validator using this regex on my input: ^[A-Za-zÀ-ÖØ-öø-ÿœŒŸ \-']{1,50}$ on one of my input "name" The problem is when the name contains exclamation mark ! the error pattern does not tell me the input is invalid, the form is shown as valid, is there something I am missing? thanks for your help Continue reading...