How does react control the display and hiding of a component, and the js program of the component is still running after it is hidden?

problem description

how react controls the display and hiding of a component, and the component"s js program is still running after it is hidden

the environmental background of the problems and what methods you have tried

try to control the display attribute. I wonder if

related codes

/ / Please paste the code text below (do not replace the code with pictures)

what result do you expect? What is the error message actually seen?

expect the component to be running after it is hidden

Apr.04,2021

react does not encourage operations on dom elements. The hiding and display of
elements is of course a matter of css . For example:

  

css controls display

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-64f5-1e46cbc-4436d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e46cbc-4436d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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