May I ask how the choice of the region is realized?

whether the region selection of this pop-up box is implemented in native js, or there are plug-ins that can be used. How can this effect be achieved

Dec.02,2021
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-64f5-1e9505c-1520.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e9505c-1520.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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