How does the chrome extension operate after a page's asynchronous communication ends?

problem description

write an extension to customize the appearance of a website by moving a div

this div itself does not respond, it is a response function added by the js file of the website

so simply setting "run_at": "document_end"document_idle" cannot respond after moving div

how to wait for the js execution of the site itself to finish before executing my js?

Apr.07,2021

when the page is loaded, set a poll to query the specific properties of the div, or call back the normal logic

after the specific operation of the js is loaded.
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-64f5-1b32338-e344.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b32338-e344.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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