我的项目需要一个日期选择器，在网上查找时..我找到了一个。但是，它不允许允许 future 的日期。我尝试查看代码，但无法完全理解它。我对 JQuery 有点陌生。
这是代码(很长，抱歉):
<script>
$.datepicker._defaults.isDateSelector = false;
$.datepicker._defaults.onAfterUpdate = null;
$.datepicker._defaults.base_update = $.datepicker._updateDatepicker;
$.datepicker._defaults.base_generate = $.datepicker._generateHTML;
function DateRange(options) {
if (!options.startField) throw "Missing Required Start Field!";
if (!options.endField) throw "Missing Required End Field!";
var isDateSelector = true;
var cur = -1,prv = -1, cnt = 0;
var df = options.dateFormat ? options.dateFormat:'mm/dd/yy';
var RangeType = {ID:'rangetype',BOTH:0,START:1,END:2};
var sData = {input:$(options.startField),div:$(document.createElement("DIV"))};
var eData = {input:null,div:null};
/*
* Overloading JQuery DatePicker to add functionality - This should use WidgetFactory!
*/
$.datepicker._updateDatepicker = function (inst) {
var base = this._get(inst, 'base_update');
base.call(this, inst);
if (isDateSelector) {
var onAfterUpdate = this._get(inst, 'onAfterUpdate');
if (onAfterUpdate) onAfterUpdate.apply((inst.input ? inst.input[0] : null), [(inst.input ? inst.input.val() : ''), inst]);
}
};
$.datepicker._generateHTML = function (inst) {
var base = this._get(inst, 'base_generate');
var thishtml = base.call(this, inst);
var ds = this._get(inst, 'isDateSelector');
if (isDateSelector) {
thishtml = $('<div />').append(thishtml);
thishtml = thishtml.children();
}
return thishtml;
};
function _hideSDataCalendar() {
sData.div.hide();
}
function _hideEDataCalendar() {
eData.div.hide();
}
function _handleOnSelect(dateText, inst, type) {
var localeDateText = $.datepicker.formatDate(df, new Date(inst.selectedYear, inst.selectedMonth, inst.selectedDay));
// 0 = sData, 1 = eData
switch(cnt) {
case 0:
sData.input.val(localeDateText);
eData.input.val('');
cnt=1;
break;
case 1:
if (sData.input.val()) {
var s = $.datepicker.parseDate(df,sData.input.val()).getTime();
var e = $.datepicker.parseDate(df,localeDateText).getTime();
if (e >= s) {
eData.input.val(localeDateText);
cnt=0;
}
}
}
}
function _handleBeforeShowDay(date, type) {
// Allow future dates?
var f = (options.allowFuture || date < new Date());
switch(type)
{
case RangeType.BOTH:
return [true, ((date.getTime() >= Math.min(prv, cur) && date.getTime() <= Math.max(prv, cur)) ?
'ui-daterange-selected' : '')];
case RangeType.END:
var s2 = null;
if (sData.input && sData.input.val()) {
try{
s2 = $.datepicker.parseDate(df,sData.input.val()).getTime();
}catch(e){}
}
var e2 = null;
if (eData.input && eData.input.val()) {
try {
e2 = $.datepicker.parseDate(df,eData.input.val()).getTime();
}catch(e){}
}
var drs = 'ui-daterange-selected';
var t = date.getTime();
if (s2 && !e2) {
return [(t >= s2 || cnt === 0) && f, (t===s2) ? drs:''];
}
if (s2 && e2) {
return [f, (t >= s2 && t <= e2) ? drs:''];
}
if (e2 && !s2) {
return [t < e2 && f,(t < e2) ? drs:''];
}
return [f,''];
}
}
function _attachCloseOnClickOutsideHandlers() {
$('html').click(function(e) {
var t = $(e.target);
if (sData.div.css('display') !== 'none') {
if (sData.input.is(t) || sData.div.has(t).length || /(ui-icon|ui-corner-all)/.test(e.target.className)) {
e.stopPropagation();
}else{
_hideSDataCalendar();
}
}
if (eData && eData.div.css('display') !== 'none') {
if (eData.input.is(t) || eData.div.has(t).length || /(ui-icon|ui-corner-all)/.test(e.target.className)) {
e.stopPropagation();
}else{
_hideEDataCalendar();
}
}
});
}
function _alignContainer(data, alignment) {
var dir = {right:'left',left:'right'};
var css = {
position: 'absolute',
top: data.input.position().top + data.input.outerHeight(true)
};
css[alignment ? dir[alignment]:'right'] = '0em';
data.div.css(css);
}
function _handleChangeMonthYear(year, month, inst) {
// What do we want to do here to sync?
}
function _focusStartDate(e) {
cnt = 0;
sData.div.datepicker('refresh');
_alignContainer(sData,options.opensTo);
sData.div.show();
_hideEDataCalendar();
}
function _focusEndDate(e) {
cnt = 1;
_alignContainer(eData,options.opensTo);
eData.div.datepicker('refresh');
eData.div.show();
sData.div.datepicker('refresh');
sData.div.hide();
}
// Build the start input element
sData.input.attr(RangeType.ID, options.endField ? RangeType.START : RangeType.BOTH);
sData.div.attr('id',sData.input.attr('id')+'_cDiv');
sData.div.addClass('ui-daterange-calendar');
sData.div.hide();
var pDiv = $(document.createElement("DIV"));
pDiv.addClass('ui-daterange-container');
// Move the dom around
sData.input.before(pDiv);
pDiv.append(sData.input.detach());
pDiv.append(sData.div);
sData.input.on('focus', _focusStartDate);
sData.input.keydown(function(e){if(e.keyCode==9){return false;}});
sData.input.keyup(function(e){
_handleKeyUp(e, options.endField ? RangeType.START : RangeType.BOTH);
});
_attachCloseOnClickOutsideHandlers();
var sDataOptions = {
showButtonPanel: true,
changeMonth: true,
changeYear: true,
isDateSelector: true,
beforeShow:function(){sData.input.datepicker('refresh');},
beforeShowDay: function(date){
return _handleBeforeShowDay(date, options.endField ? RangeType.END : RangeType.BOTH);
},
onChangeMonthYear: _handleChangeMonthYear,
onSelect: function(dateText, inst) {
return _handleOnSelect(dateText,inst,options.endField ? RangeType.END : RangeType.BOTH);
},
onAfterUpdate: function(){
$('<button type="button" class="ui-datepicker-close ui-state-default ui-priority-primary ui-corner-all" data-handler="hide" data-event="click">Done</button>')
.appendTo($('#'+sData.div.attr('id') + ' .ui-datepicker-buttonpane'))
.on('click', function () {
sData.div.hide();
});
}
};
sData.div.datepicker($.extend({}, options, sDataOptions));
// Attach the end input element
if (options.endField) {
eData.input = $(options.endField);
if (eData.input.length > 1 || !eData.input.is("input")) {
throw "Illegal element provided for end range input!";
}
if (!eData.input.attr('id')) {eData.input.attr('id','dp_'+new Date().getTime());}
eData.input.attr(RangeType.ID, RangeType.END);
eData.div = $(document.createElement("DIV"));
eData.div.addClass('ui-daterange-calendar');
eData.div.attr('id',eData.input.attr('id')+'_cDiv');
eData.div.hide();
pDiv = $(document.createElement("DIV"));
pDiv.addClass('ui-daterange-container');
// Move the dom around
eData.input.before(pDiv);
pDiv.append(eData.input.detach());
pDiv.append(eData.div);
eData.input.on('focus', _focusEndDate);
// Add Keyup handler
eData.input.keyup(function(e){
_handleKeyUp(e, RangeType.END);
});
var eDataOptions = {
showButtonPanel: true,
changeMonth: true,
changeYear: true,
isDateSelector: true,
beforeShow:function(){sData.input.datepicker('refresh');},
beforeShowDay: function(date){
return _handleBeforeShowDay(date, RangeType.END);
},
onSelect: function(dateText, inst) {
return _handleOnSelect(dateText,inst,RangeType.END);
},
onAfterUpdate: function(){
$('<button type="button" class="ui-datepicker-close ui-state-default ui-priority-primary ui-corner-all" data-handler="hide" data-event="click">Done</button>')
.appendTo($('#'+eData.div.attr('id') + ' .ui-datepicker-buttonpane'))
.on('click', function () {
eData.div.hide();
});
}
};
eData.div.datepicker($.extend({}, options, eDataOptions));
}
return {
// Returns an array of dates[start,end]
getDates: function getDates() {
var dates = [];
var sDate = sData.input.val();
if (sDate) {
try {
dates.push($.datepicker.parseDate(df,sDate));
}catch(e){}
}
var eDate = (eData.input) ? eData.input.val():null;
if (eDate) {
try {
dates.push($.datepicker.parseDate(df,eDate));
}catch(e){}
}
return dates;
},
// Returns the end date as a js date
getStartDate: function getStartDate() {
try {
return $.datepicker.parseDate(df,sData.input.val());
}catch(e){}
},
// Returns the start date as a js date
getEndDate: function getEndDate() {
try {
return $.datepicker.parseDate(df,eData.input.val());
}catch(e){}
}
};
}
var cfg = {startField: '#fromDate', endField: '#toDate',opensTo: 'Left', numberOfMonths: 3, defaultDate: -50};
var dr = new DateRange(cfg);
</script>
代码中有一条注释:“允许 future 日期？”这就是我尝试寻找的地方，但几个小时以来我都没有运气。请帮助我。
这是日期范围选择器在我的页面中的样子:
非常感谢您的帮助。
更新:JSFIDDLE http://jsfiddle.net/dacrazycoder/4Fppd/
最佳答案
在 cfg 中，添加一个带有键 allowFuture 且值为 true 的属性
关于javascript - 如何让日期选择器在 JQuery 中选择 future 的日期？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/34579060/