window.location.origin 兼容IE

Ie瀏覽器下，有時候獲取到的window.location.origin為undefined,需要兼容

let origin: any;
        if (!window.location.origin) {
          origin = window.location.protocol + '//' + window.location.hostname + (window.location.port ? ':' + window.location.port : '');
        } else {
          origin = window.location.origin;
        }