我在我的项目中使用javascript日历。它工作得很好。但我想在日历中禁用之前的日期。用于该日历的代码如下。
/* Code starts here*/
var datepickr = (function() {
var datepickrs = [],
currentDate = new Date(),
date = {
current: {
year: function() {
return currentDate.getFullYear();
},
month: {
integer: function() {
return currentDate.getMonth();
},
string: function(full) {
var date = currentDate.getMonth();
return monthToStr(date, full);
}
},
day: function() {
return currentDate.getDate();
}
},
month: {
string: function(full, currentMonthView) {
var date = currentMonthView;
return monthToStr(date, full);
},
numDays: function(currentMonthView, currentYearView) {
// checks to see if february is a leap year otherwise return the respective # of days
return (currentMonthView == 1 && !(currentYearView & 3) && (currentYearView % 1e2 || !(currentYearView % 4e2))) ? 29 : daysInMonth[currentMonthView];
}
}
},
weekdays = ['Sun', 'Mon', 'Tues', 'Wednes', 'Thurs', 'Fri', 'Satur'],
months = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'],
daysInMonth = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31],
suffix = { 1: 'st', 2: 'nd', 3: 'rd', 21: 'st', 22: 'nd', 23: 'rd', 31: 'st' },
buildCache = [],
handlers = {
calendarClick: function(e) {
if(e.target.className) {
switch(e.target.className) {
case 'prev-month':
case 'prevMonth':
this.currentMonthView--;
if(this.currentMonthView < 0) {
this.currentYearView--;
this.currentMonthView = 11;
}
rebuildCalendar.call(this);
break;
case 'next-month':
case 'nextMonth':
this.currentMonthView++;
if(this.currentMonthView > 11) {
this.currentYearView++;
this.currentMonthView = 0;
}
rebuildCalendar.call(this);
break;
case 'day':
this.element.value = formatDate(new Date(this.currentYearView, this.currentMonthView, e.target.innerHTML).getTime(), this.config.dateFormat);
this.close();
break;
}
}
},
documentClick: function(e) {
if(e.target != this.element && e.target != this.calendar) {
var parentNode = e.target.parentNode;
if(parentNode != this.calender) {
while(parentNode != this.calendar) {
parentNode = parentNode.parentNode;
if(parentNode == null) {
this.close();
break;
}
}
}
}
}
};
function formatDate(milliseconds, dateFormat) {
var formattedDate = '',
dateObj = new Date(milliseconds),
format = {
d: function() {
var day = format.j();
return (day < 10) ? '0' + day : day;
},
D: function() {
return weekdays[format.w()].substring(0, 3);
},
j: function() {
return dateObj.getDate();
},
l: function() {
return weekdays[format.w()] + 'day';
},
S: function() {
return suffix[format.j()] || 'th';
},
w: function() {
return dateObj.getDay();
},
F: function() {
return monthToStr(format.n(), true);
},
m: function() {
var month = format.n() + 1;
return (month < 10) ? '0' + month : month;
},
M: function() {
return monthToStr(format.n(), false);
},
n: function() {
return dateObj.getMonth();
},
Y: function() {
return dateObj.getFullYear();
},
y: function() {
return format.Y().toString().substring(2, 4);
}
},
formatPieces = dateFormat.split('');
foreach(formatPieces, function(formatPiece) {
formattedDate += format[formatPiece] ? format[formatPiece]() : formatPiece;
});
return formattedDate;
}
function foreach(items, callback) {
var i = 0, x = items.length;
for(i; i < x; i++) {
if(callback(items[i], i) === false) {
break;
}
}
}
function addEvent(element, eventType, callback) {
if(element.addEventListener) {
element.addEventListener(eventType, callback, false);
} else if(element.attachEvent) {
var fixedCallback = function(e) {
e = e || window.event;
e.preventDefault = (function(e) {
return function() { e.returnValue = false; }
})(e);
e.stopPropagation = (function(e) {
return function() { e.cancelBubble = true; }
})(e);
e.target = e.srcElement;
callback.call(element, e);
};
element.attachEvent('on' + eventType, fixedCallback);
}
}
function removeEvent(element, eventType, callback) {
if(element.removeEventListener) {
element.removeEventListener(eventType, callback, false);
} else if(element.detachEvent) {
element.detachEvent('on' + eventType, callback);
}
}
function buildNode(nodeName, attributes, content) {
var element;
if(!(nodeName in buildCache)) {
buildCache[nodeName] = document.createElement(nodeName);
}
element = buildCache[nodeName].cloneNode(false);
if(attributes != null) {
for(var attribute in attributes) {
element[attribute] = attributes[attribute];
}
}
if(content != null) {
if(typeof(content) == 'object') {
element.appendChild(content);
} else {
element.innerHTML = content;
}
}
return element;
}
function monthToStr(date, full) {
return ((full == true) ? months[date] : ((months[date].length > 3) ? months[date].substring(0, 3) : months[date]));
}
function isToday(day, currentMonthView, currentYearView) {
return day == date.current.day() && currentMonthView == date.current.month.integer() && currentYearView == date.current.year();
}
function buildWeekdays() {
var weekdayHtml = document.createDocumentFragment();
foreach(weekdays, function(weekday) {
weekdayHtml.appendChild(buildNode('th', {}, weekday.substring(0, 2)));
});
return weekdayHtml;
}
function rebuildCalendar() {
while(this.calendarBody.hasChildNodes()){
this.calendarBody.removeChild(this.calendarBody.lastChild);
}
var firstOfMonth = new Date(this.currentYearView, this.currentMonthView, 1).getDay(),
numDays = date.month.numDays(this.currentMonthView, this.currentYearView);
this.currentMonth.innerHTML = date.month.string(this.config.fullCurrentMonth, this.currentMonthView) + ' ' + this.currentYearView;
this.calendarBody.appendChild(buildDays(firstOfMonth, numDays, this.currentMonthView, this.currentYearView));
}
function buildCurrentMonth(config, currentMonthView, currentYearView) {
return buildNode('span', { className: 'current-month' }, date.month.string(config.fullCurrentMonth, currentMonthView) + ' ' + currentYearView);
}
function buildMonths(config, currentMonthView, currentYearView) {
var months = buildNode('div', { className: 'months' }),
prevMonth = buildNode('span', { className: 'prev-month' }, buildNode('span', { className: 'prevMonth' }, '<')),
nextMonth = buildNode('span', { className: 'next-month' }, buildNode('span', { className: 'nextMonth' }, '>'));
months.appendChild(prevMonth);
months.appendChild(nextMonth);
return months;
}
function buildDays(firstOfMonth, numDays, currentMonthView, currentYearView) {
var calendarBody = document.createDocumentFragment(),
row = buildNode('tr'),
dayCount = 0, i;
// print out previous month's "days"
for(i = 1; i <= firstOfMonth; i++) {
row.appendChild(buildNode('td', null, ' '));
dayCount++;
}
for(i = 1; i <= numDays; i++) {
// if we have reached the end of a week, wrap to the next line
if(dayCount == 7) {
calendarBody.appendChild(row);
row = buildNode('tr');
dayCount = 0;
}
var todayClassName = isToday(i, currentMonthView, currentYearView) ? { className: 'today' } : null;
row.appendChild(buildNode('td', todayClassName, buildNode('span', { className: 'day' }, i)));
dayCount++;
}
// if we haven't finished at the end of the week, start writing out the "days" for the next month
for(i = 1; i <= (7 - dayCount); i++) {
row.appendChild(buildNode('td', null, ' '));
}
calendarBody.appendChild(row);
return calendarBody;
}
function buildCalendar() {
var firstOfMonth = new Date(this.currentYearView, this.currentMonthView, 1).getDay(),
numDays = date.month.numDays(this.currentMonthView, this.currentYearView),
self = this;
var inputLeft = inputTop = 0,
obj = this.element;
if(obj.offsetParent) {
do {
inputLeft += obj.offsetLeft;
inputTop += obj.offsetTop;
} while (obj = obj.offsetParent);
}
var calendarContainer = buildNode('div', { className: 'calendar' });
calendarContainer.style.cssText = 'display: none; position: absolute; top: ' + (inputTop + this.element.offsetHeight) + 'px; left: ' + inputLeft + 'px; z-index: 100;';
this.currentMonth = buildCurrentMonth(this.config, this.currentMonthView, this.currentYearView)
var months = buildMonths(this.config, this.currentMonthView, this.currentYearView);
months.appendChild(this.currentMonth);
var calendar = buildNode('table', null, buildNode('thead', null, buildNode('tr', { className: 'weekdays' }, buildWeekdays())));
this.calendarBody = buildNode('tbody');
this.calendarBody.appendChild(buildDays(firstOfMonth, numDays, this.currentMonthView, this.currentYearView));
calendar.appendChild(this.calendarBody);
calendarContainer.appendChild(months);
calendarContainer.appendChild(calendar);
document.body.appendChild(calendarContainer);
addEvent(calendarContainer, 'click', function(e) { handlers.calendarClick.call(self, e); });
return calendarContainer;
}
return function(elementId, userConfig) {
var self = this;
this.element = document.getElementById(elementId);
this.config = {
fullCurrentMonth: true,
dateFormat: 'F jS, Y'
};
this.currentYearView = date.current.year();
this.currentMonthView = date.current.month.integer();
if(userConfig) {
for(var key in userConfig) {
if(this.config.hasOwnProperty(key)) {
this.config[key] = userConfig[key];
}
}
}
this.documentClick = function(e) { handlers.documentClick.call(self, e); }
this.open = function(e) {
addEvent(document, 'click', self.documentClick);
foreach(datepickrs, function(datepickr) {
if(datepickr != self) {
datepickr.close();
}
});
self.calendar.style.display = 'block';
}
this.close = function() {
removeEvent(document, 'click', self.documentClick);
self.calendar.style.display = 'none';
}
this.calendar = buildCalendar.call(this);
datepickrs.push(this);
if(this.element.nodeName == 'INPUT') {
addEvent(this.element, 'focus', this.open);
} else {
addEvent(this.element, 'click', this.open);
}
}
})();
/* Code Ends here*/
在上面的代码中，我想添加更多内容还是想要更改某些内容..？
请告诉我..
提前致谢， Sree ram。
答案 0 :(得分：1)
以下代码应防止当前日期之前的任何日期可供选择。
$('#element').datepicker({
minDate: new Date()
});
希望这能回答你的问题。