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lightpick.js
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/**
* @author: Rinat G. http://coding.kz
* @copyright: Copyright (c) 2019 Rinat G.
* @license: Licensed under the MIT license. See http://www.opensource.org/licenses/mit-license.php
*/
// Following the UMD template https://github.com/umdjs/umd/blob/master/templates/returnExportsGlobal.js
(function (root, factory) {
if (typeof define === 'function' && define.amd) {
// AMD. Make globaly available as well
define(['moment'], function (moment) {
return factory(moment);
});
} else if (typeof module === 'object' && module.exports) {
// Node / Browserify
var moment = (typeof window != 'undefined' && typeof window.moment != 'undefined') ? window.moment : require('moment');
module.exports = factory(moment);
} else {
// Browser globals
root.Lightpick = factory(root.moment);
}
}(this, function(moment) {
'use strict';
var document = window.document,
defaults = {
field: null,
secondField: null,
firstDay: 1,
parentEl: 'body',
lang: 'auto',
format: 'DD/MM/YYYY',
separator: ' - ',
numberOfMonths: 1,
numberOfColumns: 2,
preventCollapse: false,
singleDate: true,
autoclose: true,
repick: false,
startDate: null,
endDate: null,
minDate: null,
maxDate: null,
disableDates: null,
selectForward: false,
selectBackward: false,
minDays: null,
maxDays: null,
hoveringTooltip: true,
hideOnBodyClick: true,
footer: false,
disabledDatesInRange: true,
tooltipNights: false,
orientation: 'auto',
disableWeekends: false,
dontRedrawAfterSelect: false,
inline: false,
dropdowns: {
years: {
min: 1900,
max: null,
},
months: true,
},
locale: {
buttons: {
prev: '←',
next: '→',
close: '×',
reset: 'Reset',
apply: 'Apply',
},
tooltip: {
one: 'day',
other: 'days',
},
tooltipOnDisabled: null,
pluralize: function(i, locale){
if (typeof i === "string") i = parseInt(i, 10);
if (i === 1 && 'one' in locale) return locale.one;
if ('other' in locale) return locale.other;
return '';
},
},
onSelect: null,
onOpen: null,
onClose: null,
onError: null,
},
renderTopButtons = function(opts)
{
var disablePrevious = false;
var disableNext = false;
var prevCalendar = opts.calendar[0] || null;
var nextCalendar = opts.calendar[1] || null;
if (opts.minDate && prevCalendar && prevCalendar.isBefore(opts.minDate, 'day')) {
disablePrevious = true;
}
if (opts.maxDate && nextCalendar && nextCalendar.isAfter(opts.maxDate, 'day')) {
disableNext = true;
}
return '<div class="lightpick__toolbar">'
+ ''
+ '<button type="button" class="lightpick__previous-action" ' + (disablePrevious ? 'disabled' : '') + '>' + opts.locale.buttons.prev + '</button>'
+ '<button type="button" class="lightpick__next-action" ' + (disableNext ? 'disabled' : '') + '>' + opts.locale.buttons.next + '</button>'
+ (!opts.autoclose && !opts.inline ? '<button type="button" class="lightpick__close-action">' + opts.locale.buttons.close + '</button>' : '')
+ '</div>';
},
weekdayName = function(opts, day, short)
{
return new Date(1970, 0, day).toLocaleString(opts.lang, { weekday: short ? 'short' : 'long' })
},
renderDay = function(opts, date, dummy, extraClass)
{
if (dummy) return '<div></div>';
var date = moment(date),
prevMonth = moment(date).subtract(1, 'month'),
nextMonth = moment(date).add(1, 'month');
var day = {
time: moment(date).valueOf(),
className: ['lightpick__day', 'is-available']
};
if (extraClass instanceof Array || Object.prototype.toString.call(extraClass) === '[object Array]') {
extraClass = extraClass.filter( function( el ) {
return ['lightpick__day', 'is-available', 'is-previous-month', 'is-next-month'].indexOf( el ) >= 0;
});
day.className = day.className.concat(extraClass);
}
else {
day.className.push(extraClass);
}
if (opts.disableDates) {
for (var i = 0; i < opts.disableDates.length; i++) {
if (opts.disableDates[i] instanceof Array || Object.prototype.toString.call(opts.disableDates[i]) === '[object Array]') {
var _from = moment(opts.disableDates[i][0]),
_to = moment(opts.disableDates[i][1]);
if (_from.isValid() && _to.isValid() && date.isBetween(_from, _to, 'day', '[]')){
day.className.push('is-disabled');
}
}
else if (moment(opts.disableDates[i]).isValid() && moment(opts.disableDates[i]).isSame(date, 'day')) {
day.className.push('is-disabled');
}
if (day.className.indexOf('is-disabled') >= 0) {
if (opts.locale.tooltipOnDisabled && (!opts.startDate || date.isAfter(opts.startDate) || opts.startDate && opts.endDate)) {
day.className.push('disabled-tooltip');
}
if (day.className.indexOf('is-start-date') >= 0) {
this.setStartDate(null);
this.setEndDate(null);
}
else if (day.className.indexOf('is-end-date') >= 0) {
this.setEndDate(null);
}
}
}
}
if (opts.minDays && opts.startDate && !opts.endDate) {
if (date.isBetween(moment(opts.startDate).subtract(opts.minDays - 1, 'day'), moment(opts.startDate).add(opts.minDays - 1, 'day'), 'day')) {
day.className.push('is-disabled');
if (opts.selectForward && date.isSameOrAfter(opts.startDate)) {
day.className.push('is-forward-selected');
day.className.push('is-in-range');
}
}
}
if (opts.maxDays && opts.startDate && !opts.endDate) {
if (date.isSameOrBefore(moment(opts.startDate).subtract(opts.maxDays, 'day'), 'day')) {
day.className.push('is-disabled');
}
else if (date.isSameOrAfter(moment(opts.startDate).add(opts.maxDays, 'day'), 'day')) {
day.className.push('is-disabled');
}
}
if (opts.repick && (opts.minDays || opts.maxDays) && opts.startDate && opts.endDate) {
var tempStartDate = moment(opts.repickTrigger == opts.field ? opts.endDate : opts.startDate);
if (opts.minDays) {
if (date.isBetween(moment(tempStartDate).subtract(opts.minDays - 1, 'day'), moment(tempStartDate).add(opts.minDays - 1, 'day'), 'day')) {
day.className.push('is-disabled');
}
}
if (opts.maxDays) {
if (date.isSameOrBefore(moment(tempStartDate).subtract(opts.maxDays, 'day'), 'day')) {
day.className.push('is-disabled');
}
else if (date.isSameOrAfter(moment(tempStartDate).add(opts.maxDays, 'day'), 'day')) {
day.className.push('is-disabled');
}
}
}
if (date.isSame(new Date(), 'day')) {
day.className.push('is-today');
}
if (date.isSame(opts.startDate, 'day')) {
day.className.push('is-start-date');
}
if (date.isSame(opts.endDate, 'day')) {
day.className.push('is-end-date');
}
if (opts.startDate && opts.endDate && date.isBetween(opts.startDate, opts.endDate, 'day', '[]')) {
day.className.push('is-in-range');
}
if (moment().isSame(date, 'month')) {
}
else if (prevMonth.isSame(date, 'month')) {
day.className.push('is-previous-month');
}
else if (nextMonth.isSame(date, 'month')) {
day.className.push('is-next-month');
}
if (opts.minDate && date.isBefore(opts.minDate, 'day')) {
day.className.push('is-disabled');
}
if (opts.maxDate && date.isAfter(opts.maxDate, 'day')) {
day.className.push('is-disabled');
}
if (opts.selectForward && !opts.singleDate && opts.startDate && !opts.endDate && date.isBefore(opts.startDate, 'day')) {
day.className.push('is-disabled');
}
if (opts.selectBackward && !opts.singleDate && opts.startDate && !opts.endDate && date.isAfter(opts.startDate, 'day')) {
day.className.push('is-disabled');
}
if (opts.disableWeekends && (date.isoWeekday() == 6 || date.isoWeekday() == 7)) {
day.className.push('is-disabled');
}
day.className = day.className.filter(function(value, index, self) {
return self.indexOf(value) === index;
});
if (day.className.indexOf('is-disabled') >= 0 && day.className.indexOf('is-available') >= 0) {
day.className.splice(day.className.indexOf('is-available'), 1);
}
var div = document.createElement('div');
div.className = day.className.join(' ');
div.innerHTML = date.get('date');
div.setAttribute('data-time', day.time);
return div.outerHTML;
},
renderMonthsList = function(date, opts)
{
var d = moment(date),
select = document.createElement('select');
for (var idx = 0; idx < 12; idx++) {
d.set('month', idx);
var option = document.createElement('option');
option.value = d.toDate().getMonth();
option.text = d.toDate().toLocaleString(opts.lang, { month: 'long' });
if (idx === date.toDate().getMonth()) {
option.setAttribute('selected', 'selected');
}
select.appendChild(option);
}
select.className = 'lightpick__select lightpick__select-months';
// for text align to right
select.dir = 'rtl';
if (!opts.dropdowns || !opts.dropdowns.months) {
select.disabled = true;
}
return select.outerHTML;
},
renderYearsList = function(date, opts)
{
var d = moment(date),
select = document.createElement('select'),
years = opts.dropdowns && opts.dropdowns.years ? opts.dropdowns.years : null,
minYear = years && years.min ? years.min : 1900,
maxYear = years && years.max ? years.max : Number.parseInt(moment().format('YYYY'));
if (Number.parseInt(date.format('YYYY')) < minYear) {
minYear = Number.parseInt(date.format('YYYY'));
}
if (Number.parseInt(date.format('YYYY')) > maxYear) {
maxYear = Number.parseInt(date.format('YYYY'));
}
for (var idx = minYear; idx <= maxYear; idx++) {
d.set('year', idx);
var option = document.createElement('option');
option.value = d.toDate().getFullYear();
option.text = d.toDate().getFullYear();
if (idx === date.toDate().getFullYear()) {
option.setAttribute('selected', 'selected');
}
select.appendChild(option);
}
select.className = 'lightpick__select lightpick__select-years';
if (!opts.dropdowns || !opts.dropdowns.years) {
select.disabled = true;
}
return select.outerHTML;
},
renderCalendar = function(el, opts)
{
var html = '',
monthDate = moment(opts.calendar[0]);
for (var i = 0; i < opts.numberOfMonths; i++) {
var day = moment(monthDate);
html += '<section class="lightpick__month">';
html += '<header class="lightpick__month-title-bar">'
html += '<div class="lightpick__month-title">'
+ renderMonthsList(day, opts)
+ renderYearsList(day, opts)
+ '</div>';
if (opts.numberOfMonths === 1) {
html += renderTopButtons(opts, 'days');
}
html += '</header>'; // lightpick__month-title-bar
html += '<div class="lightpick__days-of-the-week">';
for (var w = opts.firstDay + 4; w < 7 + opts.firstDay + 4; ++w) {
html += '<div class="lightpick__day-of-the-week" title="' + weekdayName(opts, w) + '">' + weekdayName(opts, w, true) + '</div>';
}
html += '</div>'; // lightpick__days-of-the-week
html += '<div class="lightpick__days">';
if (day.isoWeekday() !== opts.firstDay) {
var prevDays = day.isoWeekday() - opts.firstDay > 0 ? day.isoWeekday() - opts.firstDay : day.isoWeekday(),
prevMonth = moment(day).subtract(prevDays, 'day'),
daysInMonth = prevMonth.daysInMonth();
for (var d = prevMonth.get('date'); d <= daysInMonth; d++) {
html += renderDay(opts, prevMonth, i > 0, 'is-previous-month');
prevMonth.add(1, 'day');
}
}
var daysInMonth = day.daysInMonth(),
today = new Date();
for (var d = 0; d < daysInMonth; d++) {
html += renderDay(opts, day);
day.add(1, 'day');
}
var nextMonth = moment(day),
nextDays = 7 - nextMonth.isoWeekday() + opts.firstDay;
if (nextDays < 7) {
for (var d = nextMonth.get('date'); d <= nextDays; d++) {
html += renderDay(opts, nextMonth, i < opts.numberOfMonths - 1, 'is-next-month');
nextMonth.add(1, 'day');
}
}
html += '</div>'; // lightpick__days
html += '</section>'; // lightpick__month
monthDate.add(1, 'month');
}
opts.calendar[1] = moment(monthDate);
el.querySelector('.lightpick__months').innerHTML = html;
},
updateDates = function(el, opts)
{
var days = el.querySelectorAll('.lightpick__day');
[].forEach.call(days, function(day) {
day.outerHTML = renderDay(opts, parseInt(day.getAttribute('data-time')), false, day.className.split(' '));
});
checkDisabledDatesInRange(el, opts);
},
checkDisabledDatesInRange = function(el, opts)
{
if (opts.disabledDatesInRange || !opts.startDate || opts.endDate || !opts.disableDates) return;
var days = el.querySelectorAll('.lightpick__day'),
disabledArray = opts.disableDates.map(function(entry){
return entry instanceof Array || Object.prototype.toString.call(entry) === '[object Array]' ? entry[0] : entry;
}),
closestPrev = moment(disabledArray.filter(function(d) {
return moment(d).isBefore(opts.startDate);
}).sort(function(a,b){
return moment(b).isAfter(moment(a));
})[0]),
closestNext = moment(disabledArray.filter(function(d) {
return moment(d).isAfter(opts.startDate);
}).sort(function(a,b){
return moment(a).isAfter(moment(b));
})[0]);
[].forEach.call(days, function(dayCell) {
var day = moment(parseInt(dayCell.getAttribute('data-time')));
if (
(closestPrev && day.isBefore(closestPrev) && opts.startDate.isAfter(closestPrev))
|| (closestNext && day.isAfter(closestNext) && closestNext.isAfter(opts.startDate))
) {
dayCell.classList.remove('is-available');
dayCell.classList.add('is-disabled');
}
});
},
Lightpick = function(options)
{
var self = this,
opts = self.config(options);
self.el = document.createElement('section');
self.el.className = 'lightpick lightpick--' + opts.numberOfColumns + '-columns is-hidden';
if (opts.inline) {
self.el.className += ' lightpick--inlined';
}
var html = '<div class="lightpick__inner">'
+ (opts.numberOfMonths > 1 ? renderTopButtons(opts, 'days') : '')
+ '<div class="lightpick__months"></div>'
+ '<div class="lightpick__tooltip" style="visibility: hidden"></div>';
if (opts.footer) {
html += '<div class="lightpick__footer">';
if (opts.footer === true) {
html += '<button type="button" class="lightpick__reset-action">' + opts.locale.buttons.reset + '</button>';
html += '<div class="lightpick__footer-message"></div>';
html += '<button type="button" class="lightpick__apply-action">' + opts.locale.buttons.apply + '</button>';
}
else {
html += opts.footer;
}
html += '</div>';
}
html += '</div>';
self.el.innerHTML = html;
if (opts.parentEl instanceof Node) {
opts.parentEl.appendChild(self.el)
}
else if (opts.parentEl === 'body' && opts.inline) {
opts.field.parentNode.appendChild(self.el);
}
else {
document.querySelector(opts.parentEl).appendChild(self.el);
}
self._onMouseDown = function(e)
{
if (!e.cancelable) {
return;
}
if (!self.isShowing) {
return;
}
e = e || window.event;
var target = e.target || e.srcElement;
if (!target) {
return;
}
e.stopPropagation();
if (!target.classList.contains('lightpick__select')) {
e.preventDefault();
}
var opts = self._opts;
if (target.classList.contains('lightpick__day') && target.classList.contains('is-available')) {
var day = moment(parseInt(target.getAttribute('data-time')));
if (!opts.disabledDatesInRange && opts.disableDates && opts.startDate) {
var start = day.isAfter(opts.startDate) ? moment(opts.startDate) : moment(day),
end = day.isAfter(opts.startDate) ? moment(day) : moment(opts.startDate),
isInvalidRange = opts.disableDates.filter(function(d) {
if (d instanceof Array || Object.prototype.toString.call(d) === '[object Array]') {
var _from = moment(d[0]),
_to = moment(d[1]);
return _from.isValid() && _to.isValid() && (_from.isBetween(start, end, 'day', '[]') || _to.isBetween(start, end, 'day', '[]'));
}
return moment(d).isBetween(start, end, 'day', '[]');
});
if (isInvalidRange.length) {
self.setStartDate(null);
self.setEndDate(null);
target.dispatchEvent(new Event('mousedown'));
self.el.querySelector('.lightpick__tooltip').style.visibility = 'hidden';
updateDates(self.el, opts);
return;
}
}
if (opts.singleDate || (!opts.startDate && !opts.endDate) || (opts.startDate && opts.endDate)) {
if (opts.repick && opts.startDate && opts.endDate) {
if (opts.repickTrigger === opts.field) {
self.setStartDate(day);
target.classList.add('is-start-date');
}
else {
self.setEndDate(day);
target.classList.add('is-end-date');
}
if (opts.startDate.isAfter(opts.endDate)) {
self.swapDate();
}
if (opts.autoclose) {
setTimeout(function() {
self.hide();
}, 100);
}
}
else {
self.setStartDate(day);
self.setEndDate(null);
target.classList.add('is-start-date');
if (opts.singleDate && opts.autoclose) {
setTimeout(function() {
self.hide();
}, 100);
}
else if (!opts.dontRedrawAfterSelect && (!opts.singleDate || opts.inline)) {
updateDates(self.el, opts);
}
}
}
else if (opts.startDate && !opts.endDate) {
self.setEndDate(day);
if (opts.startDate.isAfter(opts.endDate)) {
self.swapDate();
}
target.classList.add('is-end-date');
if (opts.autoclose) {
setTimeout(function() {
self.hide();
}, 100);
}
else {
updateDates(self.el, opts);
}
}
if (!opts.disabledDatesInRange) {
if (self.el.querySelectorAll('.lightpick__day.is-available').length === 0) {
self.setStartDate(null);
updateDates(self.el, opts);
if (opts.footer) {
if (typeof self._opts.onError === 'function') {
self._opts.onError.call(self, 'Invalid range');
}
else {
var footerMessage = self.el.querySelector('.lightpick__footer-message');
if (footerMessage) {
footerMessage.innerHTML = opts.locale.not_allowed_range;
setTimeout(function(){
footerMessage.innerHTML = '';
}, 3000);
}
}
}
}
}
}
else if (target.classList.contains('lightpick__previous-action')) {
self.prevMonth();
}
else if (target.classList.contains('lightpick__next-action')) {
self.nextMonth();
}
else if (target.classList.contains('lightpick__close-action') || target.classList.contains('lightpick__apply-action')) {
self.hide();
}
else if (target.classList.contains('lightpick__reset-action')) {
self.reset();
}
};
self._onMouseEnter = function(e)
{
if (!self.isShowing) {
return;
}
e = e || window.event;
var target = e.target || e.srcElement;
if (!target) {
return;
}
var opts = self._opts;
if (target.classList.contains('lightpick__day') && target.classList.contains('disabled-tooltip') && opts.locale.tooltipOnDisabled) {
self.showTooltip(target, opts.locale.tooltipOnDisabled);
return;
}
else {
self.hideTooltip();
}
if (opts.singleDate || (!opts.startDate && !opts.endDate)) {
return;
}
if (!target.classList.contains('lightpick__day') && !target.classList.contains('is-available')) {
return;
}
if ((opts.startDate && !opts.endDate) || opts.repick) {
var hoverDate = moment(parseInt(target.getAttribute('data-time')));
if (!hoverDate.isValid()) {
return;
}
var startDate = (opts.startDate && !opts.endDate) || (opts.repick && opts.repickTrigger === opts.secondField) ? opts.startDate : opts.endDate;
var days = self.el.querySelectorAll('.lightpick__day');
[].forEach.call(days, function(day) {
var dt = moment(parseInt(day.getAttribute('data-time')));
day.classList.remove('is-flipped');
if (dt.isValid() && dt.isSameOrAfter(startDate, 'day') && dt.isSameOrBefore(hoverDate, 'day')) {
day.classList.add('is-in-range');
if (opts.repickTrigger === opts.field && dt.isSameOrAfter(opts.endDate)) {
day.classList.add('is-flipped');
}
}
else if (dt.isValid() && dt.isSameOrAfter(hoverDate, 'day') && dt.isSameOrBefore(startDate, 'day')) {
day.classList.add('is-in-range');
if (((opts.startDate && !opts.endDate) || opts.repickTrigger === opts.secondField) && dt.isSameOrBefore(opts.startDate)) {
day.classList.add('is-flipped');
}
}
else {
day.classList.remove('is-in-range');
}
if (opts.startDate && opts.endDate && opts.repick && opts.repickTrigger === opts.field) {
day.classList.remove('is-start-date');
}
else {
day.classList.remove('is-end-date');
}
});
if (opts.hoveringTooltip) {
days = Math.abs(hoverDate.isAfter(startDate) ? hoverDate.diff(startDate, 'day') : startDate.diff(hoverDate, 'day'));
if (!opts.tooltipNights) {
days += 1;
}
var tooltip = self.el.querySelector('.lightpick__tooltip');
if (days > 0 && !target.classList.contains('is-disabled')) {
var pluralText = '';
if (typeof opts.locale.pluralize === 'function') {
pluralText = opts.locale.pluralize.call(self, days, opts.locale.tooltip);
}
self.showTooltip(target, days + ' ' + pluralText);
}
else {
self.hideTooltip();
}
}
if (opts.startDate && opts.endDate && opts.repick && opts.repickTrigger === opts.field) {
target.classList.add('is-start-date');
}
else {
target.classList.add('is-end-date');
}
}
};
self._onChange = function(e)
{
e = e || window.event;
var target = e.target || e.srcElement;
if (!target) {
return;
}
if (target.classList.contains('lightpick__select-months')) {
self.gotoMonth(target.value);
}
else if (target.classList.contains('lightpick__select-years')) {
self.gotoYear(target.value);
}
};
self._onInputChange = function(e)
{
var target = e.target || e.srcElement;
if (self._opts.singleDate) {
if (!self._opts.autoclose) {
self.gotoDate(opts.field.value);
}
}
self.syncFields();
if (!self.isShowing) {
self.show();
}
};
self._onInputFocus = function(e)
{
var target = e.target || e.srcElement;
self.show(target);
};
self._onInputClick = function(e)
{
var target = e.target || e.srcElement;
self.show(target);
};
self._onClick = function(e)
{
e = e || window.event;
var target = e.target || e.srcElement,
parentEl = target;
if (!target) {
return;
}
do {
if ((parentEl.classList && parentEl.classList.contains('lightpick')) || parentEl === opts.field || (opts.secondField && parentEl === opts.secondField)) {
return;
}
}
while ((parentEl = parentEl.parentNode));
if (self.isShowing && opts.hideOnBodyClick && target !== opts.field && parentEl !== opts.field) {
self.hide();
}
};
self.showTooltip = function(target, text)
{
var tooltip = self.el.querySelector('.lightpick__tooltip');
var hasParentEl = self.el.classList.contains('lightpick--inlined'),
dayBounding = target.getBoundingClientRect(),
pickerBouding = hasParentEl ? self.el.parentNode.getBoundingClientRect() : self.el.getBoundingClientRect(),
_left = (dayBounding.left - pickerBouding.left) + (dayBounding.width / 2),
_top = dayBounding.top - pickerBouding.top;
tooltip.style.visibility = 'visible';
tooltip.textContent = text;
var tooltipBounding = tooltip.getBoundingClientRect();
_top -= tooltipBounding.height;
_left -= (tooltipBounding.width / 2);
setTimeout(function(){
tooltip.style.top = _top + 'px';
tooltip.style.left = _left + 'px';
}, 10);
};
self.hideTooltip = function()
{
var tooltip = self.el.querySelector('.lightpick__tooltip');
tooltip.style.visibility = 'hidden';
};
self.el.addEventListener('mousedown', self._onMouseDown, true);
self.el.addEventListener('mouseenter', self._onMouseEnter, true);
self.el.addEventListener('touchend', self._onMouseDown, true);
self.el.addEventListener('change', self._onChange, true);
if (opts.inline) {
self.show();
}
else {
self.hide();
}
opts.field.addEventListener('change', self._onInputChange);
opts.field.addEventListener('click', self._onInputClick);
opts.field.addEventListener('focus', self._onInputFocus);
if (opts.secondField) {
opts.secondField.addEventListener('change', self._onInputChange);
opts.secondField.addEventListener('click', self._onInputClick);
opts.secondField.addEventListener('focus', self._onInputFocus);
}
};
Lightpick.prototype = {
config: function(options)
{
var opts = Object.assign({}, defaults, options);
opts.field = (opts.field && opts.field.nodeName) ? opts.field : null;
opts.calendar = [moment().set('date', 1)];
if (opts.numberOfMonths === 1 && opts.numberOfColumns > 1) {
opts.numberOfColumns = 1;
}
opts.minDate = opts.minDate && moment(opts.minDate).isValid() ? moment(opts.minDate) : null;
opts.maxDate = opts.maxDate && moment(opts.maxDate).isValid() ? moment(opts.maxDate) : null;
if (opts.lang === 'auto') {
var browserLang = navigator.language || navigator.userLanguage;
if (browserLang) {
opts.lang = browserLang;
}
else {
opts.lang = 'en-US';
}
}
if (opts.secondField && opts.singleDate) {
opts.singleDate = false;
}
if (opts.hoveringTooltip && opts.singleDate) {
opts.hoveringTooltip = false;
}
if (Object.prototype.toString.call(options.locale) === '[object Object]') {
opts.locale = Object.assign({}, defaults.locale, options.locale);
}
if (window.innerWidth < 480 && opts.numberOfMonths > 1 && !opts.preventCollapse) {
opts.numberOfMonths = 1;
opts.numberOfColumns = 1;
}
if (opts.repick && !opts.secondField) {
opts.repick = false;
}
if (opts.inline) {
opts.autoclose = false;
opts.hideOnBodyClick = false;
}
this._opts = Object.assign({}, opts);
this.syncFields();
this.setStartDate(this._opts.startDate, true);
this.setEndDate(this._opts.endDate, true);
return this._opts;
},
syncFields: function()
{
if (this._opts.singleDate || this._opts.secondField) {
if (moment(this._opts.field.value, this._opts.format).isValid()) {
this._opts.startDate = moment(this._opts.field.value, this._opts.format);
}
if (this._opts.secondField && moment(this._opts.secondField.value, this._opts.format).isValid()) {
this._opts.endDate = moment(this._opts.secondField.value, this._opts.format);
}
}
else {
var dates = this._opts.field.value.split(this._opts.separator);
if (dates.length === 2) {
if (moment(dates[0], this._opts.format).isValid()) {
this._opts.startDate = moment(dates[0], this._opts.format);
}
if (moment(dates[1], this._opts.format).isValid()) {
this._opts.endDate = moment(dates[1], this._opts.format);
}
}
}
},
swapDate: function()
{
var tmp = moment(this._opts.startDate);
this.setDateRange(this._opts.endDate, tmp);
},
gotoToday: function()
{
this.gotoDate(new Date());
},
gotoDate: function(date)
{
var date = moment(date);
if (!date.isValid()) {
date = moment();
}
date.set('date', 1);
this._opts.calendar = [moment(date)];
renderCalendar(this.el, this._opts);
},
gotoMonth: function(month)
{
if (isNaN(month)) {
return;