How to get event name on click particular date usi

问题:

I'm integrating calendar in one of project using momentjs.

I want to display event name based on date selection.

let me take one example: if I choose date(2018-04-01) at that time I want to display custom event name.

Here is my JavaScript code,

/* Have this, somewhere in your code */

var allowedDates = [
  '2018-04-01',
  '2018-04-02',
  '2018-04-03',
  '2018-04-11',
  '2018-04-12'
];

! function() {

  var today = moment();

  function Calendar(selector, events) {
    this.el = document.querySelector(selector);
    this.events = events;
    this.current = moment().date(1);
    this.draw();
    var current = document.querySelector('.today');
    if (current) {
      var self = this;
      window.setTimeout(function() {
        self.openDay(current);
      }, 500);
    }
  }

  Calendar.prototype.draw = function() {
    //Create Header
    this.drawHeader();

    //Draw Month
    this.drawMonth();

    this.drawLegend();
  }

  Calendar.prototype.drawHeader = function() {
    var self = this;
    if (!this.header) {
      //Create the header elements
      this.header = createElement('div', 'header');
      this.header.className = 'header';

      this.title = createElement('h1');

      var right = createElement('div', 'right');
      right.addEventListener('click', function() {
        self.nextMonth();
      });

      var left = createElement('div', 'left');
      left.addEventListener('click', function() {
        self.prevMonth();
      });

      //Append the Elements
      this.header.appendChild(this.title);
      this.header.appendChild(right);
      this.header.appendChild(left);
      this.el.appendChild(this.header);
    }

    this.title.innerHTML = this.current.format('MMMM YYYY');
  }

  Calendar.prototype.drawMonth = function() {
    var self = this;

    this.events.forEach(function(ev) {
      ev.date = self.current.clone().date(Math.random() * (29 - 1) + 1);
    });


    if (this.month) {
      this.oldMonth = this.month;
      this.oldMonth.className = 'month out ' + (self.next ? 'next' : 'prev');
      this.oldMonth.addEventListener('webkitAnimationEnd', function() {
        self.oldMonth.parentNode.removeChild(self.oldMonth);
        self.month = createElement('div', 'month');
        self.backFill();
        self.currentMonth();
        self.fowardFill();
        self.el.appendChild(self.month);
        window.setTimeout(function() {
          self.month.className = 'month in ' + (self.next ? 'next' : 'prev');
        }, 16);
      });
    } else {
      this.month = createElement('div', 'month');
      this.el.appendChild(this.month);
      this.backFill();
      this.currentMonth();
      this.fowardFill();
      this.month.className = 'month new';
    }
  }

  Calendar.prototype.backFill = function() {
    var clone = this.current.clone();
    var dayOfWeek = clone.day();

    if (!dayOfWeek) {
      return;
    }

    clone.subtract('days', dayOfWeek + 1);

    for (var i = dayOfWeek; i > 0; i--) {
      this.drawDay(clone.add('days', 1));
    }
  }

  Calendar.prototype.fowardFill = function() {
    var clone = this.current.clone().add('months', 1).subtract('days', 1);
    var dayOfWeek = clone.day();

    if (dayOfWeek === 6) {
      return;
    }

    for (var i = dayOfWeek; i < 6; i++) {
      this.drawDay(clone.add('days', 1));
    }
  }

  Calendar.prototype.currentMonth = function() {
    var clone = this.current.clone();

    while (clone.month() === this.current.month()) {
      this.drawDay(clone);
      clone.add('days', 1);
    }
  }

  Calendar.prototype.getWeek = function(day) {
    if (!this.week || day.day() === 0) {
      this.week = createElement('div', 'week');
      this.month.appendChild(this.week);
    }
  }

  Calendar.prototype.drawDay = function(day) {
    var self = this;
    this.getWeek(day);

    //Outer Day
    var outer = createElement('div', this.getDayClass(day));
    outer.addEventListener('click', function() {
      // Only open if the element is not disabled
      if (!this.classList.contains('disabled')) {
        self.openDay(this);
      }
    });

    //Day Name
    var name = createElement('div', 'day-name', day.format('ddd'));

    //Day Number
    var number = createElement('div', 'day-number', day.format('DD'));


    //Events
    var events = createElement('div', 'day-events');
    this.drawEvents(day, events);

    outer.appendChild(name);
    outer.appendChild(number);
    outer.appendChild(events);
    this.week.appendChild(outer);
  }

  Calendar.prototype.drawEvents = function(day, element) {
    if (day.month() === this.current.month()) {
      var todaysEvents = this.events.reduce(function(memo, ev) {
        if (ev.date.isSame(day, 'day')) {
          memo.push(ev);
        }
        return memo;
      }, []);

      todaysEvents.forEach(function(ev) {
        var evSpan = createElement('span', ev.color);
        element.appendChild(evSpan);
      });
    }
  }

  Calendar.prototype.getDayClass = function(day) {
    classes = ['day'];
    if (day.month() !== this.current.month()) {
      classes.push('other');
    } else if (today.isSame(day, 'day')) {
      classes.push('today');
    }
    // Here, add a class to disable disallowed dates
    if (allowedDates.indexOf(day.format('YYYY-MM-DD')) < 0) {
      classes.push('disabled');
    }
    return classes.join(' ');
  }

  Calendar.prototype.openDay = function(el) {
    var details, arrow;
    var dayNumber = +el.querySelectorAll('.day-number')[0].innerText || +el.querySelectorAll('.day-number')[0].textContent;
    var day = this.current.clone().date(dayNumber);

    var currentOpened = document.querySelector('.details');

    //Check to see if there is an open detais box on the current row
    if (currentOpened && currentOpened.parentNode === el.parentNode) {
      details = currentOpened;
      arrow = document.querySelector('.arrow');
    } else {
      //Close the open events on differnt week row
      //currentOpened && currentOpened.parentNode.removeChild(currentOpened);
      if (currentOpened) {
        currentOpened.addEventListener('webkitAnimationEnd', function() {
          currentOpened.parentNode.removeChild(currentOpened);
        });
        currentOpened.addEventListener('oanimationend', function() {
          currentOpened.parentNode.removeChild(currentOpened);
        });
        currentOpened.addEventListener('msAnimationEnd', function() {
          currentOpened.parentNode.removeChild(currentOpened);
        });
        currentOpened.addEventListener('animationend', function() {
          currentOpened.parentNode.removeChild(currentOpened);
        });
        currentOpened.className = 'details out';
      }

      //Create the Details Container
      details = createElement('div', 'details in');

      //Create the arrow
      var arrow = createElement('div', 'arrow');

      //Create the event wrapper

      details.appendChild(arrow);
      el.parentNode.appendChild(details);
    }

    var todaysEvents = this.events.reduce(function(memo, ev) {
      if (ev.date.isSame(day, 'day')) {
        memo.push(ev);
      }
      return memo;
    }, []);

    this.renderEvents(todaysEvents, details);

    arrow.style.left = el.offsetLeft - el.parentNode.offsetLeft + 27 + 'px';
  }

  Calendar.prototype.renderEvents = function(events, ele) {
    //Remove any events in the current details element
    var currentWrapper = ele.querySelector('.events');
    var wrapper = createElement('div', 'events in' + (currentWrapper ? ' new' : ''));

    events.forEach(function(ev) {
      var div = createElement('div', 'event');
      var square = createElement('div', 'event-category ' + ev.color);
      var span = createElement('span', '', ev.eventName);

      div.appendChild(square);
      div.appendChild(span);
      wrapper.appendChild(div);
    });

    if (!events.length) {
      var div = createElement('div', 'event empty');
      var span = createElement('span', '', 'No Events');

      div.appendChild(span);
      wrapper.appendChild(div);
    }

    if (currentWrapper) {
      currentWrapper.className = 'events out';
      currentWrapper.addEventListener('webkitAnimationEnd', function() {
        currentWrapper.parentNode.removeChild(currentWrapper);
        ele.appendChild(wrapper);
      });
      currentWrapper.addEventListener('oanimationend', function() {
        currentWrapper.parentNode.removeChild(currentWrapper);
        ele.appendChild(wrapper);
      });
      currentWrapper.addEventListener('msAnimationEnd', function() {
        currentWrapper.parentNode.removeChild(currentWrapper);
        ele.appendChild(wrapper);
      });
      currentWrapper.addEventListener('animationend', function() {
        currentWrapper.parentNode.removeChild(currentWrapper);
        ele.appendChild(wrapper);
      });
    } else {
      ele.appendChild(wrapper);
    }
  }

  Calendar.prototype.drawLegend = function() {
    var legend = createElement('div', 'legend');
    var calendars = this.events.map(function(e) {
      return e.calendar + '|' + e.color;
    }).reduce(function(memo, e) {
      if (memo.indexOf(e) === -1) {
        memo.push(e);
      }
      return memo;
    }, []).forEach(function(e) {
      var parts = e.split('|');
      var entry = createElement('span', 'entry ' + parts[1], parts[0]);
      legend.appendChild(entry);
    });
    this.el.appendChild(legend);
  }

  Calendar.prototype.nextMonth = function() {
    this.current.add('months', 1);
    this.next = true;
    this.draw();
  }

  Calendar.prototype.prevMonth = function() {
    this.current.subtract('months', 1);
    this.next = false;
    this.draw();
  }

  window.Calendar = Calendar;

  function createElement(tagName, className, innerText) {
    var ele = document.createElement(tagName);
    if (className) {
      ele.className = className;
    }
    if (innerText) {
      ele.innderText = ele.textContent = innerText;
    }
    return ele;
  }
}();

! function() {
  var data = [{
      eventName: 'Lunch Meeting w/ Mark',
      calendar: 'Work',
      color: 'orange'
    },
    {
      eventName: 'Interview - Jr. Web Developer',
      calendar: 'Work',
      color: 'orange'
    },
    {
      eventName: 'Demo New App to the Board',
      calendar: 'Work',
      color: 'orange'
    },
    {
      eventName: 'Dinner w/ Marketing',
      calendar: 'Work',
      color: 'orange'
    },

    {
      eventName: 'Game vs Portalnd',
      calendar: 'Sports',
      color: 'blue'
    },
    {
      eventName: 'Game vs Houston',
      calendar: 'Sports',
      color: 'blue'
    },
    {
      eventName: 'Game vs Denver',
      calendar: 'Sports',
      color: 'blue'
    },
    {
      eventName: 'Game vs San Degio',
      calendar: 'Sports',
      color: 'blue'
    },

    {
      eventName: 'School Play',
      calendar: 'Kids',
      color: 'yellow'
    },
    {
      eventName: 'Parent/Teacher Conference',
      calendar: 'Kids',
      color: 'yellow'
    },
    {
      eventName: 'Pick up from Soccer Practice',
      calendar: 'Kids',
      color: 'yellow'
    },
    {
      eventName: 'Ice Cream Night',
      calendar: 'Kids',
      color: 'yellow'
    },

    {
      eventName: 'Free Tamale Night',
      calendar: 'Other',
      color: 'green'
    },
    {
      eventName: 'Bowling Team',
      calendar: 'Other',
      color: 'green'
    },
    {
      eventName: 'Teach Kids to Code',
      calendar: 'Other',
      color: 'green'
    },
    {
      eventName: 'Startup Weekend',
      calendar: 'Other',
      color: 'green'
    }
  ];



  function addDate(ev) {

  }

  var calendar = new Calendar('#calendar', data);

}();

*, *:before, *:after {
-moz-box-sizing: border-box; -webkit-box-sizing: border-box; box-sizing: border-box;
}

body {
 overflow: hidden;
 font-family: 'HelveticaNeue-UltraLight', 'Helvetica Neue UltraLight', 'Helvetica Neue', Arial, Helvetica, sans-serif;
 font-weight: 100;
 color: rgba(255, 255, 255, 1);
 margin: 0;
 padding: 0;
 background: #4A4A4A;
 -webkit-touch-callout: none;
 -webkit-user-select: none;
 -khtml-user-select: none;
 -moz-user-select: none;
 -ms-user-select: none;
 user-select: none;
}

#calendar {
  -webkit-transform: translate3d(0, 0, 0);
  -moz-transform: translate3d(0, 0, 0);
  transform: translate3d(0, 0, 0);
  width: 420px;
  margin: 0 auto;
  height: 570px;
  overflow: hidden;
}

.header {
  height: 50px;
  width: 420px;
  background: rgba(66, 66, 66, 1);
  text-align: center;
  position:relative;
  z-index: 100;
}

.header h1 {
  margin: 0;
  padding: 0;
  font-size: 20px;
  line-height: 50px;
  font-weight: 100;
  letter-spacing: 1px;
}

.left, .right {
  position: absolute;
  width: 0px;
  height: 0px;
  border-style: solid;
  top: 50%;
  margin-top: -7.5px;
  cursor: pointer;
}

.left {
  border-width: 7.5px 10px 7.5px 0;
  border-color: transparent rgba(160, 159, 160, 1) transparent transparent;
  left: 20px;
}

.right {
  border-width: 7.5px 0 7.5px 10px;
  border-color: transparent transparent transparent rgba(160, 159, 160, 1);
  right: 20px;
}

.month {
  /*overflow: hidden;*/
  opacity: 0;
}

.month.new {
  -webkit-animation: fadeIn 1s ease-out;
  opacity: 1;
}

.month.in.next {
  -webkit-animation: moveFromTopFadeMonth .4s ease-out;
  -moz-animation: moveFromTopFadeMonth .4s ease-out;
  animation: moveFromTopFadeMonth .4s ease-out;
  opacity: 1;
}

.month.out.next {
  -webkit-animation: moveToTopFadeMonth .4s ease-in;
  -moz-animation: moveToTopFadeMonth .4s ease-in;
  animation: moveToTopFadeMonth .4s ease-in;
  opacity: 1;
}

.month.in.prev {
  -webkit-animation: moveFromBottomFadeMonth .4s ease-out;
  -moz-animation: moveFromBottomFadeMonth .4s ease-out;
  animation: moveFromBottomFadeMonth .4s ease-out;
  opacity: 1;
}

.month.out.prev {
  -webkit-animation: moveToBottomFadeMonth .4s ease-in;
  -moz-animation: moveToBottomFadeMonth .4s ease-in;
  animation: moveToBottomFadeMonth .4s ease-in;
  opacity: 1;
}

.week {
 background: #4A4A4A;
}

.day {
  display: inline-block;
  width: 60px;
  padding: 10px;
  text-align: center;
  vertical-align: top;
  cursor: pointer;
  background: #4A4A4A;
  position: relative;
  z-index: 100;
}

.day.other {
 color: rgba(255, 255, 255, .3);
}

.day.today {
  color: rgba(156, 202, 235, 1);
}

.day-name {
  font-size: 9px;
  text-transform: uppercase;
  margin-bottom: 5px;
  color: rgba(255, 255, 255, .5);
  letter-spacing: .7px;
}

.day-number {
  font-size: 24px;
  letter-spacing: 1.5px;
}


.day .day-events {
  list-style: none;
  margin-top: 3px;
  text-align: center;
  height: 12px;
  line-height: 6px;
  overflow: hidden;
}

.day .day-events span {
  vertical-align: top;
  display: inline-block;
  padding: 0;
  margin: 0;
  width: 5px;
  height: 5px;
  line-height: 5px;
  margin: 0 1px;
}

.blue { background: rgba(156, 202, 235, 1); }
.orange { background: rgba(247, 167, 0, 1); }
.green { background: rgba(153, 198, 109, 1); }
.yellow { background: rgba(249, 233, 0, 1); }

.details {
  position: relative;
  width: 420px;
  height: 75px;
  background: rgba(164, 164, 164, 1);
  margin-top: 5px;
  border-radius: 4px;
}

.details.in {
  -webkit-animation: moveFromTopFade .5s ease both;
  -moz-animation: moveFromTopFade .5s ease both;
  animation: moveFromTopFade .5s ease both;
}

.details.out {
  -webkit-animation: moveToTopFade .5s ease both;
  -moz-animation: moveToTopFade .5s ease both;
  animation: moveToTopFade .5s ease both;
}

.arrow {
  position: absolute;
  top: -5px;
  left: 50%;
  margin-left: -2px;
  width: 0px;
  height: 0px;
  border-style: solid;
  border-width: 0 5px 5px 5px;
  border-color: transparent transparent rgba(164, 164, 164, 1) transparent;
  transition: all 0.7s ease;
}

.events {
  height: 75px;
  padding: 7px 0;
  overflow-y: auto;
  overflow-x: hidden;
}

.events.in {
  -webkit-animation: fadeIn .3s ease both;
  -moz-animation: fadeIn .3s ease both;
  animation: fadeIn .3s ease both;
}

.events.in {
  -webkit-animation-delay: .3s;
  -moz-animation-delay: .3s;
  animation-delay: .3s;
}

.details.out .events {
  -webkit-animation: fadeOutShrink .4s ease both;
  -moz-animation: fadeOutShink .4s ease both;
  animation: fadeOutShink .4s ease both;
}

.events.out {
  -webkit-animation: fadeOut .3s ease both;
  -moz-animation: fadeOut .3s ease both;
  animation: fadeOut .3s ease both;
}

.event {
  font-size: 16px;
  line-height: 22px;
  letter-spacing: .5px;
  padding: 2px 16px;
  vertical-align: top;
}

.event.empty {
  color: #eee;
}

.event-category {
  height: 10px;
  width: 10px;
  display: inline-block;
  margin: 6px 0 0;
  vertical-align: top;
}

.event span {
  display: inline-block;
  padding: 0 0 0 7px;
}

.legend {
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 30px;
  background: rgba(60, 60, 60, 1);
  line-height: 30px;

}

.entry {
  position: relative;
  padding: 0 0 0 25px;
  font-size: 13px;
  display: inline-block;
  line-height: 30px;
  background: transparent;
}

.entry:after {
  position: absolute;
  content: '';
  height: 5px;
  width: 5px;
  top: 12px;
  left: 14px;
}

.entry.blue:after { background: rgba(156, 202, 235, 1); }
.entry.orange:after { background: rgba(247, 167, 0, 1); }
.entry.green:after { background: rgba(153, 198, 109, 1); }
.entry.yellow:after { background: rgba(249, 233, 0, 1); }

/* Animations are cool!  */
@@-webkit-keyframes moveFromTopFade {
  from { opacity: .3; height:0px; margin-top:0px; -webkit-transform: translateY(-100%); }
}
@-moz-keyframes moveFromTopFade {
  from { height:0px; margin-top:0px; -moz-transform: translateY(-100%); }
}
@keyframes moveFromTopFade {
  from { height:0px; margin-top:0px; transform: translateY(-100%); }
}

@-webkit-keyframes moveToTopFade {
  to { opacity: .3; height:0px; margin-top:0px; opacity: 0.3; -webkit-transform: translateY(-100%); }
}
@-moz-keyframes moveToTopFade {
  to { height:0px; -moz-transform: translateY(-100%); }
}
@keyframes moveToTopFade {
  to { height:0px; transform: translateY(-100%); }
}

@-webkit-keyframes moveToTopFadeMonth {
  to { opacity: 0; -webkit-transform: translateY(-30%) scale(.95); }
}
@-moz-keyframes moveToTopFadeMonth {
  to { opacity: 0; -moz-transform: translateY(-30%); }
}
@keyframes moveToTopFadeMonth {
  to { opacity: 0; -moz-transform: translateY(-30%); }
}

@-webkit-keyframes moveFromTopFadeMonth {
  from { opacity: 0; -webkit-transform: translateY(30%) scale(.95); }
}
@-moz-keyframes moveFromTopFadeMonth {
  from { opacity: 0; -moz-transform: translateY(30%); }
}
@keyframes moveFromTopFadeMonth {
  from { opacity: 0; -moz-transform: translateY(30%); }
}

@-webkit-keyframes moveToBottomFadeMonth {
  to { opacity: 0; -webkit-transform: translateY(30%) scale(.95); }
}
@-moz-keyframes moveToBottomFadeMonth {
  to { opacity: 0; -webkit-transform: translateY(30%); }
}
@keyframes moveToBottomFadeMonth {
  to { opacity: 0; -webkit-transform: translateY(30%); }
}

@-webkit-keyframes moveFromBottomFadeMonth {
  from { opacity: 0; -webkit-transform: translateY(-30%) scale(.95); }
}
@-moz-keyframes moveFromBottomFadeMonth {
  from { opacity: 0; -webkit-transform: translateY(-30%); }
}
@keyframes moveFromBottomFadeMonth {
  from { opacity: 0; -webkit-transform: translateY(-30%); }
}

@-webkit-keyframes fadeIn  {
  from { opacity: 0; }
}
@-moz-keyframes fadeIn  {
  from { opacity: 0; }
}
@keyframes fadeIn  {
  from { opacity: 0; }
}

@-webkit-keyframes fadeOut  {
  to { opacity: 0; }
}
@-moz-keyframes fadeOut  {
  to { opacity: 0; }
}
@keyframes fadeOut  {
  to { opacity: 0; }
}

@-webkit-keyframes fadeOutShink  {
  to { opacity: 0; padding: 0px; height: 0px; }
}
@-moz-keyframes fadeOutShink  {
  to { opacity: 0; padding: 0px; height: 0px; }
}
@keyframes fadeOutShink  {
  to { opacity: 0; padding: 0px; height: 0px; }
}

.day.disabled {
  color: #888;
  cursor: default;
}

<div id="calendar"></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.5.1/moment.min.js"></script>

Could you please help me to solve this issue.?

回答1:

Hello again, @K-Series!

Since you want to add events on certain dates, you'll need to make the following adjustments to your previous code.

Step 1

Right now, there is an array of events defined at the bottom of the code. But these don't have any date, and they are distributed randomly on the calendar.

In Calendar.prototype.drawMonth, you'll find the code that does this:

this.events.forEach(function(ev) {
  ev.date = self.current.clone().date(Math.random() * (29 - 1) + 1);
});

Since your events will have dates (in String format), you can replace this with:

this.events.forEach(function(ev) {
  // Convert date Strings to Moment dates
  ev.date = moment(ev.date);
});

Step 2

In my previous answer, I suggested you could define allowedDates at the top of your code. Remove it, since we'll now use your events to determine these dates. Instead, we'll go to the start of the Calendar function, and declare it this way:

function Calendar(selector, events) {
  this.el = document.querySelector(selector);
  this.events = events;
  // Declare allowed dates
  this.allowedDates = this.events.map(function(ev) {
    return ev.date;
  });

Step 3

Now, you can replace the given events with yours, at the bottom of the file (with dates, now):

var data = [
  {
    date: '2018-04-01',
    eventName: 'Interview - Jr. Web Developer',
    calendar: 'Work',
    color: 'orange'
  },
  {
    date: '2018-04-01',
    eventName: 'Demo New App to the Board',
    calendar: 'Work',
    color: 'orange'
  },
  /* ... */
];

Step 4

In Calendar.prototype.getDayClass, you have this code (that I suggested in my previous answer):

// Here, add a class to disable disallowed dates
if (allowedDates.indexOf(day.format('YYYY-MM-DD')) < 0) {
  classes.push('disabled');
}

Since the allowedDates variable is now part of the Calendar instance, you can replace it with this.allowedDates.

Full code

! function() {

  var today = moment();

  function Calendar(selector, events) {
    this.el = document.querySelector(selector);
    this.events = events;
    // Declare allowed dates
    this.allowedDates = this.events.map(function(ev) {
      return ev.date;
    });
    this.current = moment().date(1);
    this.draw();
    var current = document.querySelector('.today');
    if (current) {
      var self = this;
      window.setTimeout(function() {
        self.openDay(current);
      }, 500);
    }
  }

  Calendar.prototype.draw = function() {
    //Create Header
    this.drawHeader();

    //Draw Month
    this.drawMonth();

    this.drawLegend();
  }

  Calendar.prototype.drawHeader = function() {
    var self = this;
    if (!this.header) {
      //Create the header elements
      this.header = createElement('div', 'header');
      this.header.className = 'header';

      this.title = createElement('h1');

      var right = createElement('div', 'right');
      right.addEventListener('click', function() {
        self.nextMonth();
      });

      var left = createElement('div', 'left');
      left.addEventListener('click', function() {
        self.prevMonth();
      });

      //Append the Elements
      this.header.appendChild(this.title);
      this.header.appendChild(right);
      this.header.appendChild(left);
      this.el.appendChild(this.header);
    }

    this.title.innerHTML = this.current.format('MMMM YYYY');
  }

  Calendar.prototype.drawMonth = function() {
    var self = this;

    this.events.forEach(function(ev) {
      // Convert date Strings to Moment dates
      ev.date = moment(ev.date);
    });


    if (this.month) {
      this.oldMonth = this.month;
      this.oldMonth.className = 'month out ' + (self.next ? 'next' : 'prev');
      this.oldMonth.addEventListener('webkitAnimationEnd', function() {
        self.oldMonth.parentNode.removeChild(self.oldMonth);
        self.month = createElement('div', 'month');
        self.backFill();
        self.currentMonth();
        self.fowardFill();
        self.el.appendChild(self.month);
        window.setTimeout(function() {
          self.month.className = 'month in ' + (self.next ? 'next' : 'prev');
        }, 16);
      });
    } else {
      this.month = createElement('div', 'month');
      this.el.appendChild(this.month);
      this.backFill();
      this.currentMonth();
      this.fowardFill();
      this.month.className = 'month new';
    }
  }

  Calendar.prototype.backFill = function() {
    var clone = this.current.clone();
    var dayOfWeek = clone.day();

    if (!dayOfWeek) {
      return;
    }

    clone.subtract('days', dayOfWeek + 1);

    for (var i = dayOfWeek; i > 0; i--) {
      this.drawDay(clone.add('days', 1));
    }
  }

  Calendar.prototype.fowardFill = function() {
    var clone = this.current.clone().add('months', 1).subtract('days', 1);
    var dayOfWeek = clone.day();

    if (dayOfWeek === 6) {
      return;
    }

    for (var i = dayOfWeek; i < 6; i++) {
      this.drawDay(clone.add('days', 1));
    }
  }

  Calendar.prototype.currentMonth = function() {
    var clone = this.current.clone();

    while (clone.month() === this.current.month()) {
      this.drawDay(clone);
      clone.add('days', 1);
    }
  }

  Calendar.prototype.getWeek = function(day) {
    if (!this.week || day.day() === 0) {
      this.week = createElement('div', 'week');
      this.month.appendChild(this.week);
    }
  }

  Calendar.prototype.drawDay = function(day) {
    var self = this;
    this.getWeek(day);

    //Outer Day
    var outer = createElement('div', this.getDayClass(day));
    outer.addEventListener('click', function() {
      // Only open if the element is not disabled
      if (!this.classList.contains('disabled')) {
        self.openDay(this);
      }
    });

    //Day Name
    var name = createElement('div', 'day-name', day.format('ddd'));

    //Day Number
    var number = createElement('div', 'day-number', day.format('DD'));


    //Events
    var events = createElement('div', 'day-events');
    this.drawEvents(day, events);

    outer.appendChild(name);
    outer.appendChild(number);
    outer.appendChild(events);
    this.week.appendChild(outer);
  }

  Calendar.prototype.drawEvents = function(day, element) {
    if (day.month() === this.current.month()) {
      var todaysEvents = this.events.reduce(function(memo, ev) {
        if (ev.date.isSame(day, 'day')) {
          memo.push(ev);
        }
        return memo;
      }, []);

      todaysEvents.forEach(function(ev) {
        var evSpan = createElement('span', ev.color);
        element.appendChild(evSpan);
      });
    }
  }

  Calendar.prototype.getDayClass = function(day) {
    classes = ['day'];
    if (day.month() !== this.current.month()) {
      classes.push('other');
    } else if (today.isSame(day, 'day')) {
      classes.push('today');
    }
    // Here, add a class to disable disallowed dates
    if (this.allowedDates.indexOf(day.format('YYYY-MM-DD')) < 0) {
      classes.push('disabled');
    }
    return classes.join(' ');
  }

  Calendar.prototype.openDay = function(el) {
    var details, arrow;
    var dayNumber = +el.querySelectorAll('.day-number')[0].innerText || +el.querySelectorAll('.day-number')[0].textContent;
    var day = this.current.clone().date(dayNumber);

    var currentOpened = document.querySelector('.details');

    //Check to see if there is an open detais box on the current row
    if (currentOpened && currentOpened.parentNode === el.parentNode) {
      details = currentOpened;
      arrow = document.querySelector('.arrow');
    } else {
      //Close the open events on differnt week row
      //currentOpened && currentOpened.parentNode.removeChild(currentOpened);
      if (currentOpened) {
        currentOpened.addEventListener('webkitAnimationEnd', function() {
          currentOpened.parentNode.removeChild(currentOpened);
        });
        currentOpened.addEventListener('oanimationend', function() {
          currentOpened.parentNode.removeChild(currentOpened);
        });
        currentOpened.addEventListener('msAnimationEnd', function() {
          currentOpened.parentNode.removeChild(currentOpened);
        });
        currentOpened.addEventListener('animationend', function() {
          currentOpened.parentNode.removeChild(currentOpened);
        });
        currentOpened.className = 'details out';
      }

      //Create the Details Container
      details = createElement('div', 'details in');

      //Create the arrow
      var arrow = createElement('div', 'arrow');

      //Create the event wrapper

      details.appendChild(arrow);
      el.parentNode.appendChild(details);
    }

    var todaysEvents = this.events.reduce(function(memo, ev) {
      if (ev.date.isSame(day, 'day')) {
        memo.push(ev);
      }
      return memo;
    }, []);

    this.renderEvents(todaysEvents, details);

    arrow.style.left = el.offsetLeft - el.parentNode.offsetLeft + 27 + 'px';
  }

  Calendar.prototype.renderEvents = function(events, ele) {
    //Remove any events in the current details element
    var currentWrapper = ele.querySelector('.events');
    var wrapper = createElement('div', 'events in' + (currentWrapper ? ' new' : ''));

    events.forEach(function(ev) {
      var div = createElement('div', 'event');
      var square = createElement('div', 'event-category ' + ev.color);
      var span = createElement('span', '', ev.eventName);

      div.appendChild(square);
      div.appendChild(span);
      wrapper.appendChild(div);
    });

    if (!events.length) {
      var div = createElement('div', 'event empty');
      var span = createElement('span', '', 'No Events');

      div.appendChild(span);
      wrapper.appendChild(div);
    }

    if (currentWrapper) {
      currentWrapper.className = 'events out';
      currentWrapper.addEventListener('webkitAnimationEnd', function() {
        currentWrapper.parentNode.removeChild(currentWrapper);
        ele.appendChild(wrapper);
      });
      currentWrapper.addEventListener('oanimationend', function() {
        currentWrapper.parentNode.removeChild(currentWrapper);
        ele.appendChild(wrapper);
      });
      currentWrapper.addEventListener('msAnimationEnd', function() {
        currentWrapper.parentNode.removeChild(currentWrapper);
        ele.appendChild(wrapper);
      });
      currentWrapper.addEventListener('animationend', function() {
        currentWrapper.parentNode.removeChild(currentWrapper);
        ele.appendChild(wrapper);
      });
    } else {
      ele.appendChild(wrapper);
    }
  }

  Calendar.prototype.drawLegend = function() {
    var legend = createElement('div', 'legend');
    var calendars = this.events.map(function(e) {
      return e.calendar + '|' + e.color;
    }).reduce(function(memo, e) {
      if (memo.indexOf(e) === -1) {
        memo.push(e);
      }
      return memo;
    }, []).forEach(function(e) {
      var parts = e.split('|');
      var entry = createElement('span', 'entry ' + parts[1], parts[0]);
      legend.appendChild(entry);
    });
    this.el.appendChild(legend);
  }

  Calendar.prototype.nextMonth = function() {
    this.current.add('months', 1);
    this.next = true;
    this.draw();
  }

  Calendar.prototype.prevMonth = function() {
    this.current.subtract('months', 1);
    this.next = false;
    this.draw();
  }

  window.Calendar = Calendar;

  function createElement(tagName, className, innerText) {
    var ele = document.createElement(tagName);
    if (className) {
      ele.className = className;
    }
    if (innerText) {
      ele.innderText = ele.textContent = innerText;
    }
    return ele;
  }
}();

! function () {

  var data = [
      {
        date: '2018-04-01',
        eventName: 'Interview - Jr. Web Developer',
        calendar: 'Work',
        color: 'orange'
      },
      {
        date: '2018-04-01',
        eventName: 'Demo New App to the Board',
        calendar: 'Work',
        color: 'orange'
      },
      {
        date: '2018-04-02',
        eventName: 'Setup continuous integration',
        calendar: 'Work',
        color: 'orange'
      },
      {
        date: '2018-04-03',
        eventName: 'Doctor\'s appointpment',
        calendar: 'Personal',
        color: 'blue'
      },
      {
        date: '2018-04-11',
        eventName: 'Deploy app',
        calendar: 'Work',
        color: 'orange'
      }
    ];

  var calendar = new Calendar('#calendar', data);

}();

*, *:before, *:after {
-moz-box-sizing: border-box; -webkit-box-sizing: border-box; box-sizing: border-box;
}

body {
 overflow: hidden;
 font-family: 'HelveticaNeue-UltraLight', 'Helvetica Neue UltraLight', 'Helvetica Neue', Arial, Helvetica, sans-serif;
 font-weight: 100;
 color: rgba(255, 255, 255, 1);
 margin: 0;
 padding: 0;
 background: #4A4A4A;
 -webkit-touch-callout: none;
 -webkit-user-select: none;
 -khtml-user-select: none;
 -moz-user-select: none;
 -ms-user-select: none;
 user-select: none;
}

#calendar {
  -webkit-transform: translate3d(0, 0, 0);
  -moz-transform: translate3d(0, 0, 0);
  transform: translate3d(0, 0, 0);
  width: 420px;
  margin: 0 auto;
  height: 570px;
  overflow: hidden;
}

.header {
  height: 50px;
  width: 420px;
  background: rgba(66, 66, 66, 1);
  text-align: center;
  position:relative;
  z-index: 100;
}

.header h1 {
  margin: 0;
  padding: 0;
  font-size: 20px;
  line-height: 50px;
  font-weight: 100;
  letter-spacing: 1px;
}

.left, .right {
  position: absolute;
  width: 0px;
  height: 0px;
  border-style: solid;
  top: 50%;
  margin-top: -7.5px;
  cursor: pointer;
}

.left {
  border-width: 7.5px 10px 7.5px 0;
  border-color: transparent rgba(160, 159, 160, 1) transparent transparent;
  left: 20px;
}

.right {
  border-width: 7.5px 0 7.5px 10px;
  border-color: transparent transparent transparent rgba(160, 159, 160, 1);
  right: 20px;
}

.month {
  /*overflow: hidden;*/
  opacity: 0;
}

.month.new {
  -webkit-animation: fadeIn 1s ease-out;
  opacity: 1;
}

.month.in.next {
  -webkit-animation: moveFromTopFadeMonth .4s ease-out;
  -moz-animation: moveFromTopFadeMonth .4s ease-out;
  animation: moveFromTopFadeMonth .4s ease-out;
  opacity: 1;
}

.month.out.next {
  -webkit-animation: moveToTopFadeMonth .4s ease-in;
  -moz-animation: moveToTopFadeMonth .4s ease-in;
  animation: moveToTopFadeMonth .4s ease-in;
  opacity: 1;
}

.month.in.prev {
  -webkit-animation: moveFromBottomFadeMonth .4s ease-out;
  -moz-animation: moveFromBottomFadeMonth .4s ease-out;
  animation: moveFromBottomFadeMonth .4s ease-out;
  opacity: 1;
}

.month.out.prev {
  -webkit-animation: moveToBottomFadeMonth .4s ease-in;
  -moz-animation: moveToBottomFadeMonth .4s ease-in;
  animation: moveToBottomFadeMonth .4s ease-in;
  opacity: 1;
}

.week {
 background: #4A4A4A;
}

.day {
  display: inline-block;
  width: 60px;
  padding: 10px;
  text-align: center;
  vertical-align: top;
  cursor: pointer;
  background: #4A4A4A;
  position: relative;
  z-index: 100;
}

.day.other {
 color: rgba(255, 255, 255, .3);
}

.day.today {
  color: rgba(156, 202, 235, 1);
}

.day-name {
  font-size: 9px;
  text-transform: uppercase;
  margin-bottom: 5px;
  color: rgba(255, 255, 255, .5);
  letter-spacing: .7px;
}

.day-number {
  font-size: 24px;
  letter-spacing: 1.5px;
}


.day .day-events {
  list-style: none;
  margin-top: 3px;
  text-align: center;
  height: 12px;
  line-height: 6px;
  overflow: hidden;
}

.day .day-events span {
  vertical-align: top;
  display: inline-block;
  padding: 0;
  margin: 0;
  width: 5px;
  height: 5px;
  line-height: 5px;
  margin: 0 1px;
}

.blue { background: rgba(156, 202, 235, 1); }
.orange { background: rgba(247, 167, 0, 1); }
.green { background: rgba(153, 198, 109, 1); }
.yellow { background: rgba(249, 233, 0, 1); }

.details {
  position: relative;
  width: 420px;
  height: 75px;
  background: rgba(164, 164, 164, 1);
  margin-top: 5px;
  border-radius: 4px;
}

.details.in {
  -webkit-animation: moveFromTopFade .5s ease both;
  -moz-animation: moveFromTopFade .5s ease both;
  animation: moveFromTopFade .5s ease both;
}

.details.out {
  -webkit-animation: moveToTopFade .5s ease both;
  -moz-animation: moveToTopFade .5s ease both;
  animation: moveToTopFade .5s ease both;
}

.arrow {
  position: absolute;
  top: -5px;
  left: 50%;
  margin-left: -2px;
  width: 0px;
  height: 0px;
  border-style: solid;
  border-width: 0 5px 5px 5px;
  border-color: transparent transparent rgba(164, 164, 164, 1) transparent;
  transition: all 0.7s ease;
}

.events {
  height: 75px;
  padding: 7px 0;
  overflow-y: auto;
  overflow-x: hidden;
}

.events.in {
  -webkit-animation: fadeIn .3s ease both;
  -moz-animation: fadeIn .3s ease both;
  animation: fadeIn .3s ease both;
}

.events.in {
  -webkit-animation-delay: .3s;
  -moz-animation-delay: .3s;
  animation-delay: .3s;
}

.details.out .events {
  -webkit-animation: fadeOutShrink .4s ease both;
  -moz-animation: fadeOutShink .4s ease both;
  animation: fadeOutShink .4s ease both;
}

.events.out {
  -webkit-animation: fadeOut .3s ease both;
  -moz-animation: fadeOut .3s ease both;
  animation: fadeOut .3s ease both;
}

.event {
  font-size: 16px;
  line-height: 22px;
  letter-spacing: .5px;
  padding: 2px 16px;
  vertical-align: top;
}

.event.empty {
  color: #eee;
}

.event-category {
  height: 10px;
  width: 10px;
  display: inline-block;
  margin: 6px 0 0;
  vertical-align: top;
}

.event span {
  display: inline-block;
  padding: 0 0 0 7px;
}

.legend {
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 30px;
  background: rgba(60, 60, 60, 1);
  line-height: 30px;

}

.entry {
  position: relative;
  padding: 0 0 0 25px;
  font-size: 13px;
  display: inline-block;
  line-height: 30px;
  background: transparent;
}

.entry:after {
  position: absolute;
  content: '';
  height: 5px;
  width: 5px;
  top: 12px;
  left: 14px;
}

.entry.blue:after { background: rgba(156, 202, 235, 1); }
.entry.orange:after { background: rgba(247, 167, 0, 1); }
.entry.green:after { background: rgba(153, 198, 109, 1); }
.entry.yellow:after { background: rgba(249, 233, 0, 1); }

/* Animations are cool!  */
@@-webkit-keyframes moveFromTopFade {
  from { opacity: .3; height:0px; margin-top:0px; -webkit-transform: translateY(-100%); }
}
@-moz-keyframes moveFromTopFade {
  from { height:0px; margin-top:0px; -moz-transform: translateY(-100%); }
}
@keyframes moveFromTopFade {
  from { height:0px; margin-top:0px; transform: translateY(-100%); }
}

@-webkit-keyframes moveToTopFade {
  to { opacity: .3; height:0px; margin-top:0px; opacity: 0.3; -webkit-transform: translateY(-100%); }
}
@-moz-keyframes moveToTopFade {
  to { height:0px; -moz-transform: translateY(-100%); }
}
@keyframes moveToTopFade {
  to { height:0px; transform: translateY(-100%); }
}

@-webkit-keyframes moveToTopFadeMonth {
  to { opacity: 0; -webkit-transform: translateY(-30%) scale(.95); }
}
@-moz-keyframes moveToTopFadeMonth {
  to { opacity: 0; -moz-transform: translateY(-30%); }
}
@keyframes moveToTopFadeMonth {
  to { opacity: 0; -moz-transform: translateY(-30%); }
}

@-webkit-keyframes moveFromTopFadeMonth {
  from { opacity: 0; -webkit-transform: translateY(30%) scale(.95); }
}
@-moz-keyframes moveFromTopFadeMonth {
  from { opacity: 0; -moz-transform: translateY(30%); }
}
@keyframes moveFromTopFadeMonth {
  from { opacity: 0; -moz-transform: translateY(30%); }
}

@-webkit-keyframes moveToBottomFadeMonth {
  to { opacity: 0; -webkit-transform: translateY(30%) scale(.95); }
}
@-moz-keyframes moveToBottomFadeMonth {
  to { opacity: 0; -webkit-transform: translateY(30%); }
}
@keyframes moveToBottomFadeMonth {
  to { opacity: 0; -webkit-transform: translateY(30%); }
}

@-webkit-keyframes moveFromBottomFadeMonth {
  from { opacity: 0; -webkit-transform: translateY(-30%) scale(.95); }
}
@-moz-keyframes moveFromBottomFadeMonth {
  from { opacity: 0; -webkit-transform: translateY(-30%); }
}
@keyframes moveFromBottomFadeMonth {
  from { opacity: 0; -webkit-transform: translateY(-30%); }
}

@-webkit-keyframes fadeIn  {
  from { opacity: 0; }
}
@-moz-keyframes fadeIn  {
  from { opacity: 0; }
}
@keyframes fadeIn  {
  from { opacity: 0; }
}

@-webkit-keyframes fadeOut  {
  to { opacity: 0; }
}
@-moz-keyframes fadeOut  {
  to { opacity: 0; }
}
@keyframes fadeOut  {
  to { opacity: 0; }
}

@-webkit-keyframes fadeOutShink  {
  to { opacity: 0; padding: 0px; height: 0px; }
}
@-moz-keyframes fadeOutShink  {
  to { opacity: 0; padding: 0px; height: 0px; }
}
@keyframes fadeOutShink  {
  to { opacity: 0; padding: 0px; height: 0px; }
}

.day.disabled {
  color: #888;
  cursor: default;
}

<div id="calendar"></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.5.1/moment.min.js"></script>