跨子域的数据共享
代码示例:
//在主域名下设置cookie
document.cookie = "username=John Doe;domain=example.com";
//获取主域名下的cookie
var value = document.cookie.replace(/(?:(?:^|.;\s)username\s*=\s*([^;]).$)|^.*$/, "$1");
//在子域名下获取主域名的cookie
var value = document.cookie.replace(/(?:(?:^|.;\s)username\s*=\s*([^;]).$)|^.*$/, "$1");
//在子域名下设置cookie
document.cookie = "username=John Doe;domain=sub.example.com";
//获取子域名下的cookie
var value = document.cookie.replace(/(?:(?:^|.;\s)username\s*=\s*([^;]).$)|^.*$/, "$1");
//在主域名下获取子域名的cookie
var value = document.cookie.replace(/(?:(?:^|.;\s)username\s*=\s*([^;]).$)|^.*$/, "$1");