The use of element NavMenu Navigation menu

when I use the element NavMenu navigation menu myself, it flashes when I click on the submenu and reopens the submenu, but I see that the use of the vue-element-admin item, when navigating to another subroute, will not flicker and reopen the submenu. How is this achieved

Jan.20,2022

found the answer by setting a unique key for the routing exit router-view in app

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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-64f5-1eb81ba-26a8.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1eb81ba-26a8.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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