data-calendar | React calendar component designed to be | Calendar library

var calendar = {
  activeDates: null,

  dateClicked: function () {
    this.activeDates = document.querySelectorAll(
      '[data-calendar-status="active"]'
    )
    for (var i = 0; i < this.activeDates.length; i++) {
      this.activeDates[i].addEventListener('click', this.eventListener)
    }
  },

  eventListener: function () {
    this.removeSelectedClass()
    this.classList.add('vcal-date--selected')
  },

  removeSelectedClass: function () {
    // details omitted
  },

  dateChecked: function () {
    //will call removeEventListener here
  }
}