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HTML

              
                <style>
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@100&display=swap');
</style>

<div>
  <h1>Emoji Confetti ๐ŸŽ‰</h1>
  <p>Click the button for a surprise</p>
</div>

<div class="main">
  <a class="btn" onclick="create()">Click Me!</a>
</div>

<p>&lt;/&gt; by <a href="https://www.djdmorrison.co.uk" target="_blank">DJDMorrison</p>
              
            
!

CSS

              
                .emoji {
  position: absolute;
  top: calc(50% - 10px);
  left: 50%;
  will-change: transform;
  z-index: -1;
  opacity: 1;
  transition: opacity 500ms ease;
  transition-delay: 1s;
  &.show {
    opacity: 0;
  }
}

// Presentation CSS
body {
  font-family: 'Roboto', sans-serif;
  box-sizing: border-box;
  margin: 0;
  padding: 100px 0;
  height: 100vh;
  width: 100%;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
}

.main {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.btn {
  background: #049fd9;
  color: white;
  padding: 10px 20px;
  border-radius: 5px;
  font-family: sans-serif;
  z-index: 999;
  cursor: pointer;
}

h1, p {
  margin: 0;
  text-align: center;
  padding: 0 10px;
}

h1 {
  margin-bottom: 5px;
}

a {
  color: black;
}
              
            
!

JS

              
                // Dot === Emoji

const MS_60FPS = 1000 / 60;

const emojis = ['๐ŸŒˆ', 'โค๏ธ', '๐Ÿงก', '๐Ÿ’›', '๐Ÿ’š', '๐Ÿ’™', '๐Ÿ’œ', '๐ŸคŽ', '๐Ÿ–ค', '๐Ÿค']
const timeout = 3000;
const maxNumDots = 20;
const gravity = .2;

let dots = [];

// Create a new random emoji and give it random velocity and delay
function createDot() {
  const el = document.createElement('div');
  el.innerHTML = emojis[Math.floor(Math.random() * emojis.length)];
  el.classList.add('emoji');

  const x = 0;
  const y = 0;
  const vx = -3 + (Math.random() * 6);
  const vy = 5 + Math.random() * 5;
  const delay = Math.random() * 1000;
  
  return {
    x, 
    y,
    vx,
    vy,
    el,
    delay,
    timeout,
    visible: false
  };
}

// Create a random number of dots and push to dots list
function create() {
  let newDots = [];
  const num = Math.ceil(Math.random() * maxNumDots);
  
  for (let x = 0; x < num; x++) {
    newDots.push(createDot());
  }
  
  dots = [...dots, ...newDots];
}

// for each dot, perform actions depending on it's state 
function update() {
  dots.forEach(dot => {
    // if timeout is below 0, remove from dots list and dom
    if (dot.timeout < 0) {
      dots = dots.filter(d => d !== dot);
      
      document.body.removeChild(dot.el);
    }
    
    // if the dot is visible, check if it has show class and update it's velocity and position
    if (dot.visible) {
      if (!dot.el.classList.contains('show')) {
        dot.el.classList.add('show');
      }

      dot.vy -= gravity;

      dot.x += dot.vx;
      dot.y -= dot.vy;

      const transform = `translate(${dot.x}px, ${dot.y}px)`;

      dot.el.style.transform = transform;
    }
    // if not visible yet, update it's delay and make visible if delay below 0
    else {
      dot.delay -= MS_60FPS;
      
      if (dot.delay < 0) {
        document.body.appendChild(dot.el);
        dot.visible = true;
      }
    }
    
    dot.timeout -= MS_60FPS;
  })
}

// Update every 16.66ms to produce 60fps
setInterval(update, MS_60FPS);
              
            
!
999px

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