Option pre-check request problem

< H2 > No options is sent < / H2 >

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options

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non-simple requests found on the Internet must meet the following conditions:
request method is one of the following three methods: 

HEADGETPOST
The header information of

HTTP does not exceed the following fields: 

AcceptAccept-LanguageContent-LanguageLast-Event-IDContent-Type:application/x-www-form-urlencodedmultipart/form-datatext/plain
HeaderServerOption

I have all set json format here, why the first one didn"t send options pre-check

Network-security javascript html
Apr.07,2022

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