Douban home page know how to achieve the effect of this gray control when loading data on the next page?

clipboard.png
clipboard.png

when Zhihu and Douban load data, there will be such a gray control flickering effect. Do you know how to achieve it?

Aug.09,2021

this is the placeholder before the Skeleton Screen, load is complete. Replace the placeholder after loading. Specific implementation of self-search, you can also find controls, it is not difficult.

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-64f5-1b3687a-2c04c.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3687a-2c04c.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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