How does ionic3 use the back button to return to the previous page?

the page made by ionic will exit the page directly when the browser clicks the back button. How to modify it to return to the previous page

Mar.22,2021

at this point you need to use the cordova listening return key

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-64f5-1e9e2e1-19bb.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e9e2e1-19bb.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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