Failed to load https://testnet.nebulas.io/v1/user/call: Response to preflight request doesn't pass access control check: 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://localhost:8080' is therefore not allowed access. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.
act262
commented
6 years ago
在web钱包中测试合约逻辑正确后开始写入vue前端网页中，访问时报错
Failed to load https://testnet.nebulas.io/v1/user/call: Response to preflight request doesn't pass access control check: 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://localhost:8080' is therefore not allowed access. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.重新创建一个新的html文件，写入同样的js可以正常访问并获得返回数据 请问是什么原因？