What is the cookie sharing mechanism?

cookie is shared across ports?
what about different subdomains? For example, I have a.test.com and b.test.com , and I can also get cookie and b.test.com in the a.test.com setting. Empty it?

Front-end javascript cookie cookies
Mar.17,2021

demain is set to primary domain .com (codeshelper.com), then different subdomains can be obtained.

cookie there is something called domain

https://blog.csdn.net/zhouziy.

There are two types of sharing of

cookie: path and domain

path (directory sharing) a.com/a | a.com/b
domain (subdomain name sharing) a.a.com | b.a.com

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b32491-2bdfc.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b32491-2bdfc.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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