dynamic calendar javascript code example

Example 1: dynamic calendar in javascript with example

<!DOCTYPE html>
<html>
<head>
<style type="text/css">
.calendarMonth{
border-collapse:collapse;
background-color:#eef;
}
.calendarMonth th{
}
.calendarMonth .calendarTitle{
background-color:#ddf;
}
.calendarMonth .calendarPrevious{
background-color:#ddf;
}
.calendarMonth .calendarNext{
background-color:#ddf;
}
.calendarEmpty{
}
.calendarDay{
background:#fff;
border:1px solid black;
text-align:center;
width:2em;
}
</style>

<script type="text/javascript">
var  daysInMonth=[31,28,31,30,31,30,31,31,30,31,30,31];
var  monthNames=['January','February','March','April','May','June','July','August','September','October','November','December'];

// Returns the number of days in the month in a given year (January=0)
function getDaysInMonth(month,year){
if ((month==1)&&(year%4==0)&&((year%100!=0)||(year%400==0))){
return 29;
}else{
return daysInMonth[month];
}
}

// Performs an action when a date is clicked
function dateClicked(day,month,year){
document.forms.calendar.date.value = day+'/'+month+'/'+year;  

}

// Sets the displayed month
function setDisplayedMonth(month){
if (month<0){
alert('You have reached the beginning of this calendar');
}else if (month>=months){
alert('You have reached the end of this calendar');
}else{
for (var i=0;i<months;i++){
document.getElementById('calendarMonth'+i).style.display='none';
}
document.getElementById('calendarMonth'+month).style.display='block';
}
}
</script>
</head> 

<body>
<form id="calendar">
<table>
<tr>
<td><label for="date">Date:</label></td>
<td><input type="text" id="date" name="date" value="28/05/2015"></td>
</tr>
<tr><td></td><td>
<script type="text/javascript">
var month=0;
var year=2015;
var months=12;
for (var i=0;i<months;i++){
document.writeln('<table class="calendarMonth" '+'id="calendarMonth'+i+'" cellspacing="0">');
 document.writeln('<tr>'
          +'<th class="calendarPrevious" onClick="setDisplayedMonth('+(i-1)+')"><</th>'+'<th class="calendarTitle" colspan="5">'            +monthNames[month]+' '+year+'</th>'+'<th class="calendarNext" onClick="setDisplayedMonth('+(i+1)+')">></th>'+'</tr>');

document.writeln('<tr><th>Sun</th><th>Mon</th><th>Tue</th>'+'<th>Wed</th><th>Thu</th><th>Fri</th><th>Sat</th></tr>');
var firstDayDate=new Date(year,month,1);
var firstDay=firstDayDate.getDay();
for (j=0;j<42;j++){
if (j%7==0) document.write('<tr>')
if ((j=firstDay+getDaysInMonth(month,year))){
document.write('<td class="calendarEmpty"></td>');
}else{
document.write('<td class="calendarDay" '+'onClick="dateClicked('+(j-firstDay+1)+','+(month+1)+','+year+')">'+(j-firstDay+1)+'');
}
if (j%7==6) document.write('</tr>');
}
document.writeln('</table>');
month++;
if (month>=12){
month=0;
year++;
}
}
setDisplayedMonth(5);
</script>
</td></tr>
</table>
</form>
</body>
</html>

Example 2: how to create an event calendar in javascript

mobiscroll.settings = {
    lang: ''
    theme: 'ios',
    themeVariant: 'light'
};

var monthInst,
    dayInst,
    popupInst,
    dateInst,
    preventSet,
    allDaySwitch = document.getElementById('allDay'),
    eventTextInput = document.getElementById('eventText'),
    eventDescInput = document.getElementById('eventDesc'),
    now = new Date(),
    btn = '<button class="mbsc-btn mbsc-btn-outline mbsc-btn-danger md-delete-btn mbsc-ios">Delete</button>',
    myData = [{
        start: new Date(now.getFullYear(), now.getMonth(), 8, 13),
        end: new Date(now.getFullYear(), now.getMonth(), 8, 13, 30),
        text: 'Lunch @ Butcher\'s' + btn,
        color: '#26c57d'
    }, {
        start: new Date(now.getFullYear(), now.getMonth(), now.getDate(), 15),
        end: new Date(now.getFullYear(), now.getMonth(), now.getDate(), 16),
        text: 'General orientation' + btn,
        color: '#fd966a'
    }, {
        start: new Date(now.getFullYear(), now.getMonth(), now.getDate() - 1, 18),
        end: new Date(now.getFullYear(), now.getMonth(), now.getDate() - 1, 22),
        text: 'Dexter BD' + btn,
        color: '#37bbe4'
    }, {
        start: new Date(now.getFullYear(), now.getMonth(), now.getDate() + 1, 10, 30),
        end: new Date(now.getFullYear(), now.getMonth(), now.getDate() + 1, 11, 30),
        text: 'Stakeholder mtg.' + btn,
        color: '#d00f0f'
    }];

function navigate(inst, val) {
    if (inst) {
        inst.navigate(val);
    }
}

dateInst = mobiscroll.range('#eventDate', {
    controls: ['date', 'time'],
    dateWheels: '|D M d|',
    endInput: '#endInput',
    tabs: false,
    responsive: {
        large: {
            touchUi: false
        }
    },
    cssClass: 'md-add-event-range'
});

dayInst = mobiscroll.eventcalendar('#demo-add-event-day', {
    display: 'inline',
    view: {
        eventList: { type: 'day' }
    },
    data: myData,
    onPageChange: function (event, inst) {
        var day = event.firstDay;
        preventSet = true;
        navigate(monthInst, day);
        dateInst.setVal([day, new Date(day.getFullYear(), day.getMonth(), day.getDate(), day.getHours() + 2)], true);
    },
    onEventSelect: function (event, inst) {
        if (event.domEvent.target.classList.contains('md-delete-btn')) {
            mobiscroll.confirm({
                title: 'Confirm Deletion',
                message: 'Are you sure you want to delete this item?',
                okText: 'Delete',
                callback: function (res) {
                    if (res) {
                        inst.removeEvent([event.event._id]);
                        monthInst.removeEvent([event.event._id]);
                        mobiscroll.toast({
                            message: 'Deleted'
                        });
                    }
                }
            });
        }
    }
});

monthInst = mobiscroll.eventcalendar('#demo-add-event-month', {
    display: 'inline',
    view: {
        calendar: { type: 'month' }
    },
    data: myData,
    onSetDate: function (event, inst) {
        if (!preventSet) {
            var day = event.date;
            navigate(dayInst, day);
            dateInst.setVal([day, new Date(day.getFullYear(), day.getMonth(), day.getDate(), day.getHours() + 2)], true);
        }
        preventSet = false;
    }
});

document
    .getElementById('allDay')
    .addEventListener('change', function () {
        var allDay = this.checked;

        dateInst.option({
            controls: allDay ? ['date'] : ['date', 'time'],
            dateWheels: (allDay ? 'MM dd yy' : '|D M d|')
        });
    });

popupInst = mobiscroll.popup('#demo-add-event-popup', {
    display: 'center',
    cssClass: 'mbsc-no-padding',
    buttons: [{
            text: 'Add event',
            handler: 'set'
        },
        'cancel'
    ],
    headerText: 'Add new event',
    onSet: function (event, inst) {
        var eventDates = dateInst.getVal(),
            events = {
                start: eventDates[0],
                end: eventDates[1],
                text: (eventTextInput.value || 'New Event') + btn,
                title: eventTextInput.value || 'New Event',
                description: eventDescInput.value,
                allDay: allDaySwitch.checked,
                free: document.querySelector('input[name="free"]:checked').value == 'true'
            };
        monthInst.addEvent(events);
        dayInst.addEvent(events);
        eventTextInput.value = '';
        eventDescInput.value = '';
        // Navigate the calendar to the new event's start date
        monthInst.navigate(eventDates[0], true);
    }
});

document
    .getElementById('showAddEventPopup')
    .addEventListener('click', function () {
        popupInst.show();
    }, false);

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