Questions about the number and size of COOKIE_javascript skills

To be honest, I rarely pay attention to this issue in my daily use of JS and rarely use cookies, so I was dumbfounded when I was asked this time. I couldn't explain why, so in the end I just said: I can honestly admit that I don’t know much about the operation of this cookie. Today, a colleague asked about cookies again, so I checked online and made some relevant summaries and recorded them for future reference. As a JS programmer, you should be relatively familiar with the operation of cookies, so I won’t explain it too much.

The following are the different restrictions on cookies between browsers:

	IE6.0   IE6.0 IE7.0/8.0 Opera FF Safari Chrome cookie个数： 每个域为20个 每个域为50个 每个域为30个 每个域为50个 没有个数限制 每个域为53个 cookie总大小： 4095个字节 4095个字节 4096个字节 4097个字节 4097个字节 4097个字节	IE7.0/8.0	Opera	FF	Safari	Chrome
Number of cookies:	20 for each domain	50 for each domain	30 for each domain	50 for each domain	No limit on number	53 for each domain
Total cookie size:	4095 bytes	4095 bytes	4096 bytes	4097 bytes	4097 bytes	4097 bytes

Processing operations after the number limit is exceeded: 1. The processing of IE and Opera is the same. They all use the "least recently used algorithm". When the cookie limit has been reached, the oldest cookies will be automatically removed to leave available space for the newest cookies. 2. FF is very special. Although the last cookie set will be retained, it seems to have no rules to randomly delete existing cookies. Remarks: When we perform page cookie operations, we should try to ensure the number and corresponding size of cookies. The best number of cookies is < 20~30; the best cookie size is < 4K