Why can't the esc,delete,end,insert key pop up the corresponding keycode value?

All keyboard buttons in

JS have corresponding event.keycode,. According to the keycode comparison table, the keycode of esc is 27 and the keycode of the enter key is 13. I can get the keycode of the enter key, but I can"t get the keycode of the esc, delete,end,insert and other keys.

Mar.20,2021

https://codepen.io/caocong/pe.
keypress event cannot get esc these keycode
keydown and keyup can get

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-64f5-1be64ae-30d2f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1be64ae-30d2f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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