How to use the onclick event of element ui Notification correctly

I don"t know how to use the onclick event of element ui correctly. The document doesn"t introduce it in detail, and I haven"t worked it out for a long time.
specifically consult

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I want to trigger this event when I click Notification again

Visual-studio-code javascript html5 html
Mar.10,2021

asked the group friends and solved

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@ click= "openMessage"

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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-64f5-1bc995e-309a3.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bc995e-309a3.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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