Node Js 跨域

No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access.

• 解决方案

// 原生设置
res.setHeader('Access-Control-Allow-Origin','*')

// express设置
res.header('Access-Control-Allow-Origin', '*');

如果疑问，可加QQ:29727880