Cookie generated after the online introduction of the js plug-in

take the introduction of momentjs online as an example. When introduced online, the page will automatically generate cookie under the root domain name of momentjs, but when I checked the source code of momentjs, I did not find any code implanted in cookie, nor did I find any extra connections, and I found that this happens when many js plug-ins are introduced online, so I want to know how this cookie is generated and how it works
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<script src="http://momentjs.com/downloads/moment.js">    </script>

this cookie is called cfduid, from cloudflare, a cdn manufacturer. Many online js are distributed through cloudflare's cdn, so they will bring their cookie,. This cookie is explained on the official website:

https://support.cloudflare.co.

in fact, I don't quite understand what this cookie is really used for. The above is just about security reasons and non-invasion of privacy. ;)

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-64f5-1be545a-31759.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1be545a-31759.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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