前端出现has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource

(已被CORS策略阻塞:请求的资源上不存在'Access-Control-Allow-Origin'头文件)

在后端配置中

CORS_ORIGIN_WHITELIST

添加浏览器中提示错的from orgin 后面的地址