Mini Program canvas generates a QR code picture on the computer shows that the mobile phone report that indexof is undefined??

problem description

Mini Program uses canvas to display the generated QR code picture, but the computer shows that the mobile phone report indexof is undefined??.

the environmental background of the problems and what methods you have tried

there is no indexof method in searching js files and referenced files. I really can"t help it. Please give me your advice. Thank you very much!

related codes

/ / Please paste the code text below (do not replace the code with pictures)

what result do you expect? What is the error message actually seen?

Html5 node.js javascript php
Apr.01,2021

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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-64f5-1b3781f-2c0b3.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3781f-2c0b3.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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