Javascript 返回倒计时计时器的下一个本地化日期

我有一段代码，可以计算出一个本地化的UTC时间。根据UTC时间，还有一个函数将为我计算下一个事件日期和时间。如果时间介于12日星期日和8日星期三之间，则会给我周三的活动日期，否则会给我周日的下一个活动日期。然后，我把计算出的日期分开，作为参数输入倒计时计时器

我想知道是否有更优化的方法来实现这一点，特别是使用条件语句，以及将时间分割为参数

$(function () {
// Calculate the time locally
function calcLocalizedTime() {
    var d = new Date(); // Date for current location
    var utc = d.getTime() + (d.getTimezoneOffset() * 60000); // convert to msec add local time zone offset get UTC time in msec
    var nd = new Date(utc + (3600000 * -5));
    return nd; // return localized datetime
}

// Calculate the next Webcast DateTime
function calcNextWebCast(date) {
    var localizedTime = new Date(date||new Date()); // localized datetime
    var nextDate = new Date(date||new Date()); // Next webcast datetime object
    var today = localizedTime.getDay() + '' + localizedTime.getHours(); // format localized datetime for comparison

    if (today >= 012 && today <=320 ) { // is today between Sun @ 12 or Wednesday @ 8
        nextDate.setDate(nextDate.getDate() + (3 - 1 - nextDate.getDay() + 7) % 7 + 1);
        nextDate.setHours(20,0,0,0);
    } else {
        nextDate.setDate(nextDate.getDate() + (3 - 4 - nextDate.getDay() + 7) % 7 + 1);
        nextDate.setHours(12,0,0,0);
    }

    return nextDate;
}

var localizedTime = calcLocalizedTime();
var nextWebCast = calcNextWebCast(localizedTime);
var m = nextWebCast.getMonth() + 1;
var d = nextWebCast.getDate();
var y = nextWebCast.getFullYear();
var hh = nextWebCast.getHours();
var mm = nextWebCast.getMinutes();

$('#defaultCountdown').countdown({until: $.countdown.UTCDate(-5, y, m-1, d, hh, mm)});

});

$（函数（）{
//本地计算时间
函数calcLocalizedTime（）{
var d=new Date（）；//当前位置的日期
var utc=d.getTime（）+（d.getTimezoneOffset（）*60000）；//转换为毫秒添加本地时区偏移量获取utc时间（毫秒）
var nd=新日期（utc+（3600000*-5））；
return nd；//返回本地化的日期时间
}
//计算下一个网络广播日期时间
函数calcNextWebCast（日期）{
var localizedTime=新日期（日期| |新日期（））；//本地化日期时间
var nextDate=new Date（Date | | new Date（））；//下一个网络广播datetime对象
var today=localizedTime.getDay（）+“”+localizedTime.getHours（）；//格式化本地化日期时间以进行比较
如果（今天>=012&&today
我想知道是否有更优化的方法来实现这一点，特别是使用条件语句，以及将时间分割为参数

$(function () {
// Calculate the time locally
function calcLocalizedTime() {
    var d = new Date(); // Date for current location
    var utc = d.getTime() + (d.getTimezoneOffset() * 60000); // convert to msec add local time zone offset get UTC time in msec
    var nd = new Date(utc + (3600000 * -5));
    return nd; // return localized datetime
}

// Calculate the next Webcast DateTime
function calcNextWebCast(date) {
    var localizedTime = new Date(date||new Date()); // localized datetime
    var nextDate = new Date(date||new Date()); // Next webcast datetime object
    var today = localizedTime.getDay() + '' + localizedTime.getHours(); // format localized datetime for comparison

    if (today >= 012 && today <=320 ) { // is today between Sun @ 12 or Wednesday @ 8
        nextDate.setDate(nextDate.getDate() + (3 - 1 - nextDate.getDay() + 7) % 7 + 1);
        nextDate.setHours(20,0,0,0);
    } else {
        nextDate.setDate(nextDate.getDate() + (3 - 4 - nextDate.getDay() + 7) % 7 + 1);
        nextDate.setHours(12,0,0,0);
    }

    return nextDate;
}

var localizedTime = calcLocalizedTime();
var nextWebCast = calcNextWebCast(localizedTime);
var m = nextWebCast.getMonth() + 1;
var d = nextWebCast.getDate();
var y = nextWebCast.getFullYear();
var hh = nextWebCast.getHours();
var mm = nextWebCast.getMinutes();

$('#defaultCountdown').countdown({until: $.countdown.UTCDate(-5, y, m-1, d, hh, mm)});

});

使用分派表替换条件语句，使用regexp替换范围：

function foo(nextDate)
 {
 calcNextWebCast.nextDate.setDate(calcNextWebCast.nextDate.getDate() + (3 - 1 - nextDate.getDay() + 7) % 7 + 1);
 calcNextWebCast.nextDate.setHours(20,0,0,0);
 }

function bar(nextDate)
 {
 calcNextWebCast.nextDate.setDate(calcNextWebCast.nextDate.getDate() + (3 - 4 - nextDate.getDay() + 7) % 7 + 1);
 calcNextWebCast.nextDate.setHours(12,0,0,0);
 }


function calcNextWebCast(date) {
 calcNextWebCast.nextDate = new Date(date||new Date()); // Next webcast datetime object

 var localizedTime = new Date(date||new Date()); // localized datetime
 var today = localizedTime.getDay() + '' + localizedTime.getHours(); // format localized datetime for comparison

 var range = "012|[0][1][3-9]|[0][2-9][0-9]|[1-2][0-9][0-9]|[3][0-1][0-9]|320";

 var datemap = { "true":foo, "false":bar }

 var jump = RegExp(range).test(today);

 var go = datemap[jump];

 go();

 return nextDate;
 }

参考资料