前端清除cookie

delCookie() {
  var cookies = document.cookie.split(";");
  for (var i = 0; i < cookies.length; i++) {
    var cookie = cookies[i];
    var eqPos = cookie.indexOf("=");
    var name = eqPos > -1 ? cookie.substr(0, eqPos) : cookie;
    document.cookie = name + "=;expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
  }
  // 这个目前来说测试了没啥用
  if (cookies.length > 0) {
    for (var i = 0; i < cookies.length; i++) {
      var cookie = cookies[i];
      var eqPos = cookie.indexOf("=");
      var name = eqPos > -1 ? cookie.substr(0, eqPos) : cookie;
      var domain = location.host.substr(location.host.indexOf("."));
      document.cookie = name + "=;expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/; domain=" + domain;
    }
  }
}