JavaScript 域从子域读取 cookie

Question

I have a simple question - is there any way to read subdomain cookie on main domain by JavaScript? For example: I set cookie 'hello' with value '2' in subdomain yeah.something.com and after that I want to read it on something.com. I tried to find answer for that but I found only information how to set cookie on subdomain by creating it on domain.

Answer 1

An ancient question, but better to have it answered You can do it by creating a cookie on the domain with a dot on the start to support reading from all subdomains and from the main domain as well:

document.cookie = "_id=MY_ID;domain=.example.com;expires=;SameSite=none;Secure";

Hope it will help other lookers like me :)