Html cannot get the file type when uploading the file.

use js to get uploaded files. When judging the file type, there are computers whose uploaded word, cannot get the file type, through js, but pdf can get the file.

is obtained by using the event.files [0] .type method, and basically most computers can get it. That computer is win7. Other win7 computers can also get it

Mar.26,2021
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-64f5-1bf29b4-31e07.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bf29b4-31e07.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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