How to realize the front-end multi-layer folding panel?

1.
clipboard.png

2. How do folding panels with 3 or more layers like this data structure be implemented using native js or vue? Are there any good examples?

Mar.02,2021
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-64f5-1eae1d5-21b1.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1eae1d5-21b1.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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