How does nodejs replace the variable of js in html

nodejs loads a html file (which contains some js data)

change some variables in the js code before nodejs sends the html to the browser

Mar.04,2021
What does

actually do? I think this demand is unreasonable

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-64f5-1ea4bff-1cfd.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1ea4bff-1cfd.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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