javascript - ajax 跨域问题

Question

XMLHttpRequest cannot load http://www..com/login/isLogin. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://www..com' is therefore not allowed access.

弄清楚了。是顶级域名的问题。

Answer 1

jsonp 留意下，最常见就是callback =?

Answer 2

是不是设置了withCredentials = true;?