javascript - 是否可以在 jQuery UI Datepicker 中将选择下拉列表转换为水平月份列表？

Question

我正在构建一个基于 jQuery UI Datepicker 的日历，可以选择一次显示 3 个月的日期范围。现在它看起来像屏幕截图:

所以我需要在此日历上方添加一个 block ，其中包含从当前月份开始的 12 个水平放置的月份。我想我需要将带有月份的默认选择下拉列表转换为这个水平列表，但由于我对 JavaScript 的经验不足，我什至无法在互联网上类似示例的帮助下使用它。

当您在此 block 中选择月份时，它应该将日历切换到 3 个选定的月份。希望您能给我建议一个解决方案。

这是我当前的代码:

$("#datepicker").datepicker({
numberOfMonths: 3,
showButtonPanel: false,
dateFormat: 'dd.mm.yy',
minDate: 0,
maxDate: new Date(new Date().getTime() +  365 * 24 * 60 * 60 * 1000),
beforeShowDay: function(date) {
	var startDate = $.datepicker.parseDate('dd.mm.yy', $('#start-date').val());
	var endDate = $.datepicker.parseDate('dd.mm.yy', $('#end-date').val());
	if (startDate && endDate && startDate - endDate) {
		if (endDate <= date && date <= startDate) {
			if (startDate && date && (startDate.getTime() === date.getTime())) {
				console.log('from end to start - backward - red-start ');
				return [true, 'ui-red-end', ''];
			}
			if (endDate && date && (endDate.getTime() === date.getTime())) {
				console.log('from end to start - backward - red-end ');
				return [true, 'ui-red-start', ''];
			}
			console.log('from end to start - backward');
			return [true, 'ui-state-selected-range', ''];
		}
	}
	if (startDate <= date && date <= endDate) {
		console.log('from start to end - forward');
		if (startDate && date && (endDate.getTime() === date.getTime())) {
			console.log('from start to end - forward - red-end');
			return [true, 'ui-red-end', ''];
		}
		if (endDate && date && (startDate.getTime() === date.getTime())) {
			console.log('from start to end - forward - red-start');
			return [true, 'ui-red-start', ''];
		}
	}
	if (startDate <= date && date <= endDate) {
		console.log('from start to end');
		return [true, 'ui-state-selected-range', ''];
	}
	return [true, '', ''];
},
onSelect: function(dateText, inst) {
	var startDate = $.datepicker.parseDate('dd.mm.yy', $('#start-date').val());
	var endDate = $.datepicker.parseDate('dd.mm.yy', $('#end-date').val());
		if (!startDate || endDate) {
			$('#start-date').val(dateText);
			$('.start-date-visible').text(dateText);
			$('#end-date').val('');
			$('.end-date-visible').text('');
			$(this).datepicker('option', dateText);
		} else {
			if (new Date(dateText) < startDate) {
				var sDate = $('#start-date').val();
				$('.start-date-visible').text(dateText);
				$('#start-date').val(dateText);
				$(this).datepicker('option', null);
				$('.end-date-visible').text(sDate);
				$('#end-date').val(sDate);

			} else {
				$('.end-date-visible').text(dateText);
				$('#end-date').val(dateText);
				$(this).datepicker('option', null);
			}
		}
}
}); 
// start date on default
$('#start-date').val($.datepicker.formatDate('dd.mm.yy', new Date()));
$('.start-date-visible').text($.datepicker.formatDate('dd.mm.yy', new Date()));
// end date on default
$('#end-date').val($.datepicker.formatDate('dd.mm.yy', new Date(new Date().getTime() +
  6 * 24 * 60 * 60 * 1000)));
$('.end-date-visible').text($.datepicker.formatDate('dd.mm.yy', new Date(new Date().getTime() +
  6 * 24 * 60 * 60 * 1000)));

td.ui-state-selected-range:first-child a {
    border-radius: 20px 0 0 20px;
}
td.ui-state-selected-range:last-child a {
    border-radius: 0 20px 20px 0;
}
.ui-red-start a {
    position: relative;
    background-color: #F29676;
    border-radius: 20px;
    border: 1px solid #f29676 !important;
}
.ui-red-start a:before {
    content: '';
    right: -1px;
    left: 50%;
    top: -1px;
    bottom: -1px;
    position: absolute;
    border: 1px solid #f29676;
    border-right: none;
    background-color: #f8c3b1;
    z-index: -1;
}
.ui-red-end a {
    position: relative;
    background-color: #F29676;
    border-radius: 20px;
    border: 1px solid #f29676 !important;
}
.ui-red-end a:before {
    content: '';
    left: -1px;
    right: 50%;
    top: -1px;
    bottom: -1px;
    position: absolute;
    border: 1px solid #f29676;
    border-left: none;
    background-color: #f8c3b1;
    z-index: -1;
}

.ui-state-selected-range .ui-state-default {
    border: 1px solid #f29676 !important;
    border-left: none !important;
    border-right: none !important;
    background: #f8c3b1 !important;
    box-sizing: border-box;
}

<script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
<script src="https://code.jquery.com/ui/1.12.0/jquery-ui.min.js"></script>
<input type="text" id="start-date" style="visibility: hidden">
<input type="text" id="end-date" style="visibility: hidden">
<span class="start-date-visible"></span> 
<span class="end-date-visible"></span>
<div id="datepicker"></div>

Answer 1

希望对你有帮助

使用destroy()在选择月份时在日期选择器上设置月份。

$("#datepicker").datepicker("destroy");

然后通过所选月份重新初始化日期选择器。

var today=new Date();
var newDate;
setCalender(today.getMonth());
var today=$("#datepicker").datepicker("getDate");
var todayMonth=today.getMonth();
setMonth(todayMonth);
clickMonth();
function setCalender(defaultMonth){
$("#datepicker").datepicker("destroy");
if(today.getMonth()==defaultMonth){
newDate=new Date(today.getFullYear(),today.getMonth(),today.getDate());
}
else if(today.getMonth()>defaultMonth){
newDate=new Date(today.getFullYear()+1,defaultMonth,today.getDate());
}
else{
newDate=new Date(today.getFullYear(),defaultMonth,today.getDate());
}
$("#datepicker").datepicker({
        numberOfMonths: 3,
        showButtonPanel: false,
        dateFormat: 'dd.mm.yy',
        defaultDate: newDate,
        minDate: 0,
        maxDate: new Date(new Date().getTime() + 365 * 24 * 60 * 60 * 1000),
        beforeShowDay: function(date) {
        var dates=new Date();

            var startDate = $.datepicker.parseDate('dd.mm.yy', $('#start-date').val());
            var endDate = $.datepicker.parseDate('dd.mm.yy', $('#end-date').val());
            if (startDate && endDate && startDate - endDate) {
                if (endDate <= date && date <= startDate) {
                    if (startDate && date && (startDate.getTime() === date.getTime())) {
                        return [true, 'ui-red-end', ''];
                    }
                    if (endDate && date && (endDate.getTime() === date.getTime())) {
                        return [true, 'ui-red-start', ''];
                    }
                    return [true, 'ui-state-selected-range', ''];
                }
            }

            if (startDate <= date && date <= endDate) {
                if (startDate && date && (endDate.getTime() === date.getTime())) {
                    return [true, 'ui-red-end', ''];
                }
                if (endDate && date && (startDate.getTime() === date.getTime())) {
                    return [true, 'ui-red-start', ''];
                }
            }

            if (startDate <= date && date <= endDate) {
                return [true, 'ui-state-selected-range', ''];
            }

            return [true, '', ''];
        },
        onSelect: function(dateText, inst) {
            var startDate = $.datepicker.parseDate('dd.mm.yy', $('#start-date').val());
            var endDate = $.datepicker.parseDate('dd.mm.yy', $('#end-date').val());

            if (!startDate || endDate) {
                $('#start-date').val(dateText);
                $('.start-date-visible').text(dateText);
                $('#end-date').val('');
                $('.end-date-visible').text('');
                $(this).datepicker('option', dateText);
            } else {
                if (new Date(dateText) < startDate) {
                    var sDate = $('#start-date').val();
                    $('.start-date-visible').text(dateText);
                    $('#start-date').val(dateText);
                    $(this).datepicker('option', null);
                    $('.end-date-visible').text(sDate);
                    $('#end-date').val(sDate);

                } else {
                    $('.end-date-visible').text(dateText);
                    $('#end-date').val(dateText);
                    $(this).datepicker('option', null);
                }
            }
        }
    }); 
    // start date on default
    $('#start-date').val($.datepicker.formatDate('dd.mm.yy', new Date()));
    $('.start-date-visible').text($.datepicker.formatDate('dd.mm.yy', new Date()));
    // end date on default
    $('#end-date').val($.datepicker.formatDate('dd.mm.yy', new Date(new Date().getTime() +
      6 * 24 * 60 * 60 * 1000)));
    $('.end-date-visible').text($.datepicker.formatDate('dd.mm.yy', new Date(new Date().getTime() +
      6 * 24 * 60 * 60 * 1000)));
}     
function setMonth(todayMonth){
$(".months").empty();
var month=["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"];
var after=[];
var before=[];
$.each(month,function(i,item){
	if(i>=todayMonth){
		before.push("<label data-attr='"+i+"'>"+month[i]+"</label>");
	}
	else{
		after.push("<label data-attr='"+i+"'>"+month[i]+"</label>");
	}
});
$.each(before,function(i,item){
	$(".months").append(before[i]);
});
$.each(after,function(i,item){
	$(".months").append(after[i]);
});
for(var j=0;j<3;j++){
	$(".months").find("label").eq(j).addClass("active");
}
}
function clickMonth(){
$(document).on("click","label",function(){
	var index=$(this).attr("data-attr");
	setMonth(index);
setCalender(index);
});
}

td.ui-state-selected-range:first-child a {
    border-radius: 20px 0 0 20px;
}
td.ui-state-selected-range:last-child a {
    border-radius: 0 20px 20px 0;
}
.ui-red-start a {
    position: relative;
    background-color: #F29676;
    border-radius: 20px;
    border: 1px solid #f29676 !important;
}
.ui-red-start a:before {
    content: '';
    right: -1px;
    left: 50%;
    top: -1px;
    bottom: -1px;
    position: absolute;
    border: 1px solid #f29676;
    border-right: none;
    background-color: #f8c3b1;
    z-index: -1;
}
.ui-red-end a {
    position: relative;
    background-color: #F29676;
    border-radius: 20px;
    border: 1px solid #f29676 !important;
}
.ui-red-end a:before {
    content: '';
    left: -1px;
    right: 50%;
    top: -1px;
    bottom: -1px;
    position: absolute;
    border: 1px solid #f29676;
    border-left: none;
    background-color: #f8c3b1;
    z-index: -1;
}

.ui-state-selected-range .ui-state-default {
    border: 1px solid #f29676 !important;
    border-left: none !important;
    border-right: none !important;
    background: #f8c3b1 !important;
    box-sizing: border-box;
}
label.active{
  font-weight:bold;
  background-color: #2795ee;
}
.ui-datepicker .ui-datepicker-prev,.ui-datepicker .ui-datepicker-next{
  display:none;
}
label.active:first-child {
border-top-left-radius: 50%;
border-bottom-left-radius: 50%;
}
label.active:nth-child(3n) {
border-top-right-radius: 50%;
border-bottom-right-radius: 50%;
}
.months>label {
    display: inline-block;
    padding: 10px;
    cursor: pointer;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.css">
<input type="text" id="start-date" style="visibility: hidden">
<input type="text" id="end-date" style="visibility: hidden">
<span class="start-date-visible"></span> 
<span class="end-date-visible"></span>
<div class="months">
</div>
<div id="datepicker"></div>