How does vue implement multi-tier menus? The submenu is not in the same column as the parent menu

as shown in figure

do you have ready-made wheels?

Css3 java node.js react.js vue.js
Jun.29,2022

element-ui frame has

NavMenu

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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-64f5-1b2c039-2b25a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b2c039-2b25a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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