About how to prevent crawlers from viewing HTML code

similar to 796.com, when you open a web page, you see that the source code does not have keywords for the web page, but some JS references that I want to be similar to this or other ways to confuse my own website, HTML, to make the crawler unable to work. I also refer to some robots here

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Mar.18,2021

if you are not suspected of advertising, to tell you the truth, your 796 or something is easier to climb, and the crawler likes it this way, so in the end, I can tell you that there is no problem of keeping the crawler unable to work, unless you sacrifice your user experience and swipe a CAPTCHA every five minutes.

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-64f5-1b379fe-2c0c2.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b379fe-2c0c2.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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