How to expand all of vue-element 's NavMenu navigation menu by default?

< H2 > how to expand all NavMenu navigation menus of vue-element by default? < / H2 >

where can I modify the question?


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the combination of these three parameters is fine

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-64f5-1e879df-458f4.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e879df-458f4.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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