How is the Vue used by iqiyi's master station compatible with ie8?

my vue devtool detects that iqiyi"s main website is written in vue, but it is compatible with ie8,. Ask the gods how to do it. Are there two sets of codes?

Ie8-compatibility vue.js
Mar.09,2021

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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-64f5-1b32b6f-2be3f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b32b6f-2be3f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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