document.cookie. Below code prints all the cookies of the site separated by semi-colon.
But, a cookie that is set as
HttpOnly will not be there in the list. The server that sends the HTTP response decides if a cookie needs to be
HttpOnly or not, by adding the attribute to the end of
Set-Cookie: <name>=<value>[; <Max-Age>=<age>] [; expires=<date>][; domain=<domain_name>] [; path=<some_path>][; secure][; HttpOnly]
So if you find a working cookie code failing suddenly, this can be the reason. Check with the backend team if they had done any changes.
In Chrome, a HttpOnly cookie is marked with a tick mark in the cookies list.