About carrying credentials across origins in JavaScript

Question

When I was learning cross-origin resource sharing in JavaScript advanced programming, I tried to use the withCredentials attribute to carry a cookie to request a page in another domain. I found that the cookie I carried was not the cookie I had set before, but another cookie. thing

What are the key-value pairs in this cookie? The name of the cookie I set is cname and the value is cvalue, but it carries these things. What's going on?

Answer 1

Have permissions been set in the request header?
Access-Control-Allow-Credentials: true
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