Implement Editor with contenteditable

in the editor implemented with contenteditable, you need to highlight specific words as you type.
my operation is to get the original html, and replace the html, directly after regular matching, but the problem is that the text loses focus instead of where it was typed.
how to handle

Mar.29,2021
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-64f5-1b381d4-2c0f5.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b381d4-2c0f5.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?