Why didn't event bus work?

send events while dynamically switching components in vuejs by clicking buttons, but you cannot listen for emitted events in new components.

below is a demo

Edit Vue Template

Mar.11,2021

how can you listen for events before the new component binds them?
https://codesandbox.io/s/p7vk.

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-64f5-1e50073-443d5.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e50073-443d5.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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