How to realize office File Preview at the Front end

such as office"s .doc, .xls files. Google browser can preview directly with Office editing extensions for Google documents, tables and slides, but for users without plug-ins, how to do so? At present, there is a solution to convert to pdf implementation, but if there are multiple sheet in excel, it may be very difficult to convert to pdf. =

Mar.20,2021
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-64f5-1e44757-44ab8.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e44757-44ab8.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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