// 获取当前网页的协议+域名
function getPageBaseUrl () {
  let baseURL = ‘‘
  if (!window.location.origin) { // 兼容IE，IE11版本下location.origin为undefined
    window.location.origin = window.location.protocol + ‘//‘ + window.location.hostname + (window.location.port ? ‘:‘ + window.location.port : ‘‘)
  } else {
    baseURL = window.location.origin
  }
  return baseURL
}