Youku playback page can not debug js how to break?

http://player.youku.com/embed/XMzI2MTczMzM2NA==
this page I want to see how a piece of code works, but after the break point, and then F5 this page will not respond, how to break?

Javascript debug

Mar.14,2021

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The Node service will exit automatically when there is an error, and the error message will not be printed.
Node service automatically exits when there is an error, and the error message is not printed. For example, I commented out a line of code: ...

Javascript debug express node.js

Mar.02,2021

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-64f5-1b34be9-2ac81.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b34be9-2ac81.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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