Add all subdomains to CORS azure function

Question

In my Azure function, I need to add all subdomains for my mytestwebsite.com,

I'm trying https://*.mytestwebsite.com but it says:

CORS origin needs to be of format: [HTTP|HTTPS]://[www.]domain.[TLD][:portnumber]. Examples: http://example.com, https://example.com:8080

user_1568191 · Answer

You can't do this, the CORS spec is everything or nothing. It supports only *, null or exact domain.