经过更多的测试，CORS问题只有在我添加'credentials': 'include'头时才会出现。...？

使用Chrome浏览器，我导航到127.0.0.1：5984并从couchdb服务器获得响应。
当我使用Chrome的JavaScript调用相同的地址时，它对http://127.0.0.1:5984和http：//localhost：5984都失败了。

Access to fetch at 'http://localhost:5984/' from origin 'http://localhost:8080' has been blocked by CORS policy: 
Response to preflight request doesn't pass access control check: It does not have HTTP ok status.

couchdb盒上的local.ini文件具有：

[chttpd]
enable_cors = true
[cors]
origins = *
credentials = true
methods = GET, POST, PUT, DELETE, OPTIONS, HEAD, TRACE, PATCH
headers = accept, authorization, content-type, origin, referer, cache-control, x-requested-with, X-Couch-Id, X-Couch-Rev

我的提取选项目前有：

{
  "headers": {
    "Content-Type": "application/json",
    "method": "GET",
    "credentials": "include",
    "mode": "cors"
  }
}