How to realize the tombstone effect when the first screen is loaded in the front-end development?

see that some experience-friendly app will have a tombstone effect when the first screen is loaded. In h5 development, how to achieve this effect

Aug.21,2021

is it a skeleton screen?
summary of the scheme of the front-end skeleton screen https://codeshelper.com/a/11.


the picture with a skeleton screen saved in advance shows that hhhh is the simplest

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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-64f5-1ea8c7c-1f03.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1ea8c7c-1f03.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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