解決 ie8 window.location.origin undefined 問題

window.location.origin

蠻好用的在js中可以取網址的這一段 =>  http://sub.domain.com
但ie8似乎不支援，往路上找到個解決方法，成功解了這問題

if (!window.location.origin) {

  window.location.origin = window.location.protocol + “//” + window.location.hostname + (window.location.port ? ‘:’ + window.location.port: ”);

}

原文

http://tosbourn.com/a-fix-for-window-location-origin-in-internet-explorer/