there will be more problems with ie kernel browsers in these ways. It seems that you have permission changes at both ends. Cross-domain methods can be solved by trying jsonp.

try setting this:

Access-Control-Allow-Credentials: true

reference documentation:
https://developer.mozilla.org...
https://developer.mozilla.org...

1. The request must have a field Access-Control-Request-Method
2. If the request has a Access-Control-Request-Headers field, the backend must also have
3. The front end withCredentials and the back end Access-Control-Allow-Credentials must also be set to true

would like to ask the landlord whether this last problem has been solved?

I am debug. I found that the cross-domain problem is caused by the format of post data.
Why is there such a problem? Because under cross-domain settings, clients are only allowed to initiate simple requests, but complex requests are not supported
. My post data is in js object format, that is, json format, which allows cross-domain settings. Complex requests, that is, data requests in json format are not supported.
take a look at this article: https://www.jianshu.com/p/ebd...

how do I solve this?
modify the data format so that it looks like this:

import qs from 'qs';
const data = { 'bar': 123 };
const options = {
  method: 'POST',
  headers: { 'content-type': 'application/x-www-form-urlencoded' },
  data: qs.stringify(data),
  url,
};
axios(options);

document: https://github.com/axios/axios

at this point, the request becomes a simple request, which conforms to the setting that allows cross-domain requests, and solves