https://rdc.aliyun.com/req/1677481/asd


var regular="(\\S+)//(\\S+)/(\\S+)/(\\S+)/(\\S+)";
var re = new RegExp(regular,"g");
data=window.location.href.replace(re,"$4")
console.log(data)



data=window.location.href.replace(/(\S+)//(\S+)/(\S+)/(\S+)/(\S+)/,"$4")
console.log(data)