Happy Birthday Animation 🎂 | HTML, CSS & JavaScript Card

Create a beautiful Happy Birthday animation using HTML, CSS & JavaScript 🎉
In this tutorial, you’ll learn how to design an interactive birthday greeting card with animations, colorful text, and smooth effects using pure frontend technologies.

This project is perfect for:

Beginners learning HTML, CSS & JavaScript
Web developers who want to build creative UI projects
Creating a digital birthday card for friends & family

✨ Features Covered:

Animated birthday text
CSS effects & transitions
JavaScript interactions
Responsive design
Clean & beginner-friendly code

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HTML:

Create a HTML file and add the following code:

<div class="container">
  <div class="text" data-splitting="">Happy Birthday, <br />Full Name!</div>
  <div class="presents">
    <div class="present orange">
      <div class="lid"></div>
      <div class="box"></div>
      <div class="bow"></div>
      <div class="ribbon"></div>
    </div>
    <div class="present blue">
      <div class="lid"></div>
      <div class="box"></div>
      <div class="bow"></div>
      <div class="ribbon"></div>
    </div>
    <div class="present green">
      <div class="lid"></div>
      <div class="box"></div>
      <div class="bow"></div>
      <div class="ribbon"></div>
    </div>
  </div>
</div>

CSS:

Create a CSS file and add the following code:

@import url('https://fonts.googleapis.com/css2?family=Fredoka+One&display=swap');
 body {
	 background: #34e1ff;
	 font-family: 'Fredoka One', cursive;
	 overflow-x: hidden;
}
 .container {
	 position: absolute;
	 top: 50%;
	 left: 50%;
	 transform: translate(-50%, -50%);
}
 .text {
	 min-width: 100%;
	 text-align: center;
	 color: white;
	 text-shadow: 1px 1px #2c3a49;
	 font-size: 3em;
}
 .text .char {
	 animation: slide-in 1s cubic-bezier(0.5, 0, 0.5, 1) both;
	 animation-delay: calc(60ms * var(--char-index));
}
 @keyframes slide-in {
	 from {
		 transform: translateY(-1em) rotate(-0.5turn) scale(0.5);
		 opacity: 0;
	}
}
 .presents {
	 display: flex;
	 justify-content: center;
	 align-items: flex-end;
	 height: 200px;
}
 .green {
	 position: relative;
	 left: -20px;
	 width: 100px;
	 height: 100px;
	 z-index: 1;
}
 .green:hover {
	 animation: 0.5s green;
}
 .green .lid {
	 background: #3ddc81;
}
 .green .box {
	 background-image: radial-gradient(#fff 20%, transparent 20%), radial-gradient(#fff 20%, transparent 20%);
	 background-color: #3ddc81;
}
 .green .ribbon {
	 background: #f75d4c;
}
 .green .ribbon::before {
	 top: 21%;
}
 .green .bow {
	 background: #f75d4c;
}
 .green .bow::before, .green .bow::after {
	 background: #f75d4c;
}
 @keyframes green {
	 0% {
		 width: 100px;
		 height: 100px;
	}
	 30% {
		 width: calc(100px + 10px);
		 height: calc(100px - 10px);
	}
	 60% {
		 width: calc(100px - 10px);
		 height: calc(100px + 10px);
	}
	 100% {
		 width: 100px;
		 height: 100px;
	}
}
 .orange {
	 position: relative;
	 left: 20px;
	 width: 130px;
	 height: 120px;
	 z-index: 10;
}
 .orange:hover {
	 animation: 0.5s orange;
}
 .orange .lid {
	 background: #ffa726;
}
 .orange .box {
	 background-image: radial-gradient(#2c3a49 20%, transparent 20%), radial-gradient(#2c3a49 20%, transparent 20%);
	 background-color: #ffa726;
}
 .orange .ribbon {
	 background: #f75d4c;
}
 .orange .ribbon::before {
	 top: 21%;
}
 .orange .bow {
	 background: #f75d4c;
}
 .orange .bow::before, .orange .bow::after {
	 background: #f75d4c;
}
 @keyframes orange {
	 0% {
		 width: 130px;
		 height: 120px;
	}
	 30% {
		 width: calc(130px + 10px);
		 height: calc(120px - 10px);
	}
	 60% {
		 width: calc(130px - 10px);
		 height: calc(120px + 10px);
	}
	 100% {
		 width: 130px;
		 height: 120px;
	}
}
 .blue {
	 position: relative;
	 left: 0;
	 width: 120px;
	 height: 160px;
	 z-index: 0;
}
 .blue:hover {
	 animation: 0.5s blue;
}
 .blue .lid {
	 background: #1bb5fe;
}
 .blue .box {
	 background-image: radial-gradient(transparent 20%, transparent 20%), radial-gradient(transparent 20%, transparent 20%);
	 background-color: #1bb5fe;
}
 .blue .ribbon {
	 background: #3ddc81;
}
 .blue .ribbon::before {
	 top: 21%;
}
 .blue .bow {
	 background: #3ddc81;
}
 .blue .bow::before, .blue .bow::after {
	 background: #3ddc81;
}
 @keyframes blue {
	 0% {
		 width: 120px;
		 height: 160px;
	}
	 30% {
		 width: calc(120px + 10px);
		 height: calc(160px - 10px);
	}
	 60% {
		 width: calc(120px - 10px);
		 height: calc(160px + 10px);
	}
	 100% {
		 width: 120px;
		 height: 160px;
	}
}
 .present {
	 position: relative;
	 display: flex;
	 flex-direction: column;
	 align-items: center;
	 cursor: pointer;
}
 .present .lid {
	 height: 20%;
	 width: calc(100% + 10px);
	 border: 4px solid #2c3a49;
	 border-radius: 5px;
	 box-shadow: inset 2px 2px rgba(255, 255, 255, .5), 5px 0 rgba(0, 0, 0, .15);
}
 .present .box {
	 width: 100%;
	 height: 100%;
	 background-position: 0 0, 20px 20px;
	 background-size: 40px 40px;
	 border: 4px solid #2c3a49;
	 border-top: 0;
	 border-bottom-left-radius: 5px;
	 border-bottom-right-radius: 5px;
	 box-shadow: inset -10px 5px rgba(0, 0, 0, .3), 5px 0 rgba(0, 0, 0, .15);
}
 .present .ribbon {
	 position: absolute;
	 top: -3px;
	 width: 30px;
	 height: calc(100% - 5px);
	 border: 4px solid #2c3a49;
	 border-radius: 5px;
	 box-shadow: inset 2px 2px rgba(255, 255, 255, .5);
}
 .present .ribbon::before {
	 display: block;
	 content: '';
	 position: absolute;
	 width: 100%;
	 height: 5px;
	 background: rgba(0, 0, 0, .3);
}
 .present .bow {
	 position: absolute;
	 top: -20px;
	 width: 20px;
	 height: 20px;
	 border: 4px solid #2c3a49;
	 border-radius: 50%;
	 box-shadow: inset 2px 2px rgba(255, 255, 255, .5), inset -2px -5px rgba(0, 0, 0, .3);
}
 .present .bow::before, .present .bow::after {
	 display: block;
	 content: '';
	 position: absolute;
	 top: -10px;
	 width: 30px;
	 height: 30px;
	 border: 4px solid #2c3a49;
	 border-radius: 50%;
	 box-shadow: inset 2px 2px rgba(255, 255, 255, .5), inset -2px -5px rgba(0, 0, 0, .3);
	 z-index: -1;
}
 .present .bow::before {
	 left: 15px;
}
 .present .bow::after {
	 right: 15px;
}

JavaScript:

Create a JS file and add the following code:

document.addEventListener("click", (event) => {
  bursty(event.pageX, event.pageY);
});

setInterval(() => randomizedConfetti(), 500);

function bursty(x, y) {
  const burst = new mojs.Burst({
    left: 0,
    top: 0,
    radius: { 0: 200 },
    count: 20,
    degree: 360,
    children: {
      fill: { white: "#34E1FF" },
      duration: 2000
    }
  }).tune({
    x: x,
    y: y
  });

  burst.replay();
}

function randomizedConfetti() {
  let randomX = Math.floor(Math.random() * (document.body.clientWidth-100) + 0);
  let randomY = Math.floor(Math.random() * (window.innerHeight-200) + 0);
  const burst = new mojs.Burst({
    left: 0,
    top: 0,
    radius: { 0: 200 },
    count: 20,
    degree: 360,
    children: {
      fill: { white: "#34E1FF" },
      duration: 2000
    }
  }).tune({
    x: randomX,
    y: randomY
  });

  burst.replay();
}

Splitting();

Scripts:

<link rel="stylesheet" href="https://unpkg.com/splitting/dist/splitting.css">
<link rel="stylesheet" href="https://unpkg.com/splitting/dist/splitting-cells.css">

<script src="https://cdn.jsdelivr.net/mojs/0.288.1/mo.min.js"></script>
<script src="https://cdn.jsdelivr.net/mojs-player/0.43.15/mojs-player.min.js"></script>
<script src="https://unpkg.com/splitting/dist/splitting.min.js"></script>

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Happy coding!