今天遇到一个问题，发送请求能够成功了，返回的数据也能在 network 中看见，但是报错：
Access to XMLHttpRequest at 'http://192.168.200.112:8080/lottery/getIsWinLottery?Id=966&succ7F0D92C70492DCD' from origin 'http://192.168.200.196' has been blocked by CORS policy: The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.
请求状态码为200，在 network 中也能看到返回的数据，但是控制台没有打印信息。
搜了半天发现了解决方案：
withCredentials: false, // 允许携带cookie
其他方案都需要后端调配置。
Failed to load http://pre.api.jmxy.mockuai.c...: The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'. Origin 'http://pre.promotion.jmxy.moc...' is therefore not allowed access. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.