Question

我有以下代码。我在这行`var datemsg = nameOfMonths [date.getMonth（）] +“”+ date.getDate（）;中得到一个未定义或错误。

如果我只使用var date = new Date();，则会在HTML页面上打印这些值。但是使用我打算在下面使用getCookie("date")使用的代码来从浏览器中获取日期。它给了我一个错误，它不会打印日期和时间。

<body onload="setsaveCookie(); loadSaveCookies()">
<h1 class="header">Welcome your visit started on <span id="date"></span> at <span id="time"></span> <span id="ampm"></span></h1>

function setsaveCookie() {
  var date = new Date();
  setCookie("date", date, 30);

  getDate();
}

function setCookie(cookieName, cookieValue, expires) {
  var date = new Date();
  date.setTime(date.getTime() + (expires * 24 * 60 * 60 * 1000));
  var dayexpires = "expires=" + date.toGMTString();
  document.cookie = cookieName + "=" + cookieValue + ";" + dayexpires + ";path=/";
  var msg = "";
}

function getDate() {
  var date = new Date();
  var nameOfMonths = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "July", "Aug", "Sep", "Oct", "Nov", "Dec"]
  var ampm = "";
  var date = getCookie("date");
  var twelvehourtime = "";
  var datemsg = nameOfMonths[date.getMonth()] + " " + date.getDate();
  document.getElementById("date").innerHTML = datemsg;
}

function getCookie(cookieName) {
  var name = cookieName + "=";
  var decodedCookie = decodeURIComponent(document.cookie);

  var ca = decodedCookie.split(';');

  for (var i = 0; i < ca.length; i++) {
    var c = ca[i];
    while (c.charAt(0) == ' ') {
      c = c.substring(1);
    }
    if (c.indexOf(name) == 0) {
      return c.substring(name.length, c.length);
    }
  }
  return "";
}

Answer 1

以下是getDate函数的修订版本。

function getDate() {
var nameOfMonths = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "July", "Aug", "Sep", "Oct", "Nov", "Dec"]
    var ampm = "";
    var date = getCookie("date");
    var dt = new Date(date);
    var twelvehourtime = "";
    var datemsg = nameOfMonths[dt.getMonth()] + " " + dt.getDate();
    document.getElementById("date").innerHTML = datemsg;
}

使用cookie来获取月份，日期和时间。但是，它们没有打印，而且我的日期未定义？

1 个答案: