Questions about the onchange incident?

//
y.addEventListener("change", function() {
  year = this.value
  month = month
  dayInWeek = new Date(year, month, 1).getDay()
  printDay()
})

m.addEventListener("change", function() {
  year = year
  month = this.value
  dayInWeek = new Date(year, month, 1).getDay()
  printDay()
})
The

y event can be triggered and executed. After m triggers, the entire calendar becomes blank, as shown in the following figure:

looking around for no reason, please let me know

Mar.24,2022

after m triggers

you print out the value and dayInWeek of m

you should know why

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-64f5-1e60e46-458e1.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e60e46-458e1.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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