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// 设置 cookies
function setCookie (name, value, time) {
  document.cookie = name + '=' + escape(value) + ';max-age=' + time // toGMTString
}
// 获取 cookies
function getCookie (name) {
  let reg = new RegExp('(^| )' + name + '=([^;]*)(;|$)')
  let arr = document.cookie.match(reg)
  if (arr) {
    return unescape(arr[2])
  } else {
    return null
  }
}