IsItJasonsBirthday/script.js

var birthday = {
  now: null,
  day: 25,
  month: 6,   // June
  match: false,
  check: function() {
    this.now = new Date();
    if (this.now.getDate() == this.day && this.now.getMonth() + 1 == this.month) this.activate()
    else this.deactivate()
  },
  activate: function() {
    document.getElementById('isit').innerHTML = "Yes!"
    elementClass.remove(document.getElementById('isit'), 'nope')
    elementClass.add(document.getElementById('isit'), 'yep')
    confetti.render();
  },
  deactivate: function() {
    document.getElementById('isit').innerHTML = "No"
    elementClass.remove(document.getElementById('isit'), 'yep')
    elementClass.add(document.getElementById('isit'), 'nope')

    confetti.clear();
  }
}

var confetti = {
  displayed: false,
  confetti: null,
  target: 'confetti-holder',
  max: null,
  size: 1,
  animate: true,
  props: ['circle', 'square', 'triangle', 'line'],
  colors: [[165,104,246], [230,61,135], [0,199,228], [253,214,126]],
  clock: 25,
  rotate: true,
  width: null,
  height: null,
  render: function() {
    this.width = window.innerWidth
    this.height = window.innerHeight
    this.max = Math.floor(this.width * this.height / 1799.04)
    if (this.confetti) this.confetti.clear();

    this.confetti = new ConfettiGenerator(this)
    this.confetti.render();
    this.displayed = true;
  },
  clear: function() {
    if (!this.displayed) return;

    this.confetti.clear();
    this.displayed = false;
  }
}

var elementClass = {
  has: function(e, c) {
    return !!e.className.match(new RegExp('(\\s|^)' + c + '(\\s|$)'));
  },
  add: function(e, c) {
    if (!this.has(e,c)) e.className += " " + c;
  },
  remove: function(e, c) {
    if (this.has(e,c)) {
      var r = new RegExp('(\\s|^)' + c + '(\\s|$)');
      e.className=e.className.replace(r, ' ');
    }
  },
}

window.onload = function() {
  birthday.check();
};

window.addEventListener('resize', function() {
  if (confetti.displayed) confetti.render();
}, false);

window.setInterval(function(){
  birthday.check();
}, 5000);