Es6 Module question

look at other people"s source code and find
clipboard.png
but look at http://es6.ruanyifeng.com/-sharpdo... import typeof. What does this mean in the picture? Is it a new grammar?

Apr.11,2022
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-64f5-1edadf9-380a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1edadf9-380a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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