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<!DOCTYPE html>
<html lang="en">
<head>
<!-- Google tag (gtag.js) -->
<script async src="https://www.googletagmanager.com/gtag/js?id=G-D0ENCWPZL9"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'G-D0ENCWPZL9');
</script>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>13. CSS Animations</title>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body, html {
height: 100%;
font-family: 'Poppins', sans-serif;
background: linear-gradient(to right, #43cea2, #185a9d);
color: #333;
overflow-x: hidden;
}
.section {
background: rgba(255,255,255,0.15);
margin: 20px auto;
padding: 20px;
border-radius: 14px;
width: 90%;
max-width: 1000px;
box-shadow: 0 8px 20px rgba(0,0,0,0.3);
backdrop-filter: blur(6px);
}
h2 {
font-size: 28px;
margin-bottom: 20px;
color: white;
text-align: center;
}
h3 {
color: #
D99C
fff;
margin-top: 30px;
margin-bottom: 10px;
}
p, ul {
font-size: 17px;
color: #f1f1f1;
line-height: 1.6;
margin-bottom: 15px;
}
textarea {
width: 100%;
height: 150px;
padding: 12px;
font-size: 16px;
font-family: monospace;
background-color: rgba(255, 255, 255, 0.1);
border: 2px solid #fff;
border-radius: 10px;
color: #fff;
margin-bottom: 10px;
}
iframe {
width: 100%;
height: 150px;
background: rgba(0,0,0,0.1);
border: 2px solid white;
border-radius: 10px;
margin-top: 10px;
}
button {
padding: 8px 18px;
font-size: 15px;
font-weight: 500;
background-color: #ff5722;
color: white;
border: none;
border-radius: 8px;
cursor: pointer;
transition: transform 0.2s, background-color 0.3s;
margin-bottom: 20px;
}
button:hover {
background-color: #e64a19;
transform: scale(1.05);
}
button:active {
transform: scale(0.97);
}
</style>
</head>
<body>
<div class="section">
<h2>13. CSS Animations</h2>
<h3>I. @keyframes</h3>
<p><strong>Explanation:</strong> <code>@keyframes</code> se hum animation ka flow define karte hain — jaise element kaise start karega aur kaise end karega.</p>
<textarea id="code1">
<style>
@keyframes fadeIn {
from { opacity: 0; }
to { opacity: 1; }
}
.box {
width: 150px;
height: 150px;
background: orange;
animation: fadeIn 2s ease-in-out;
}
</style>
<div class="box"></div>
</textarea>
<button onclick="runCode('code1', 'output1')">Run Code</button>
<iframe id="output1"></iframe>
<h3>II. Animation Properties</h3>
<p><strong>Explanation:</strong> Animation ke liye kuch important properties hote hain:
<ul>
<li><code>animation-name</code>: @keyframes ka naam</li>
<li><code>animation-duration</code>: Animation kitni der chale</li>
<li><code>animation-delay</code>: Kab start ho</li>
<li><code>animation-iteration-count</code>: Kitni baar chale</li>
<li><code>animation-direction</code>: normal, reverse, alternate</li>
<li><code>animation-fill-mode</code>: Animation ke baad element ka state</li>
</ul>
</p>
<textarea id="code2">
<style>
@keyframes moveRight {
from { transform: translateX(0); }
to { transform: translateX(200px); }
}
.box {
width: 100px;
height: 100px;
background: #3498db;
animation-name: moveRight;
animation-duration: 3s;
animation-delay: 0.5s;
animation-iteration-count: 2;
animation-direction: alternate;
animation-fill-mode: forwards;
}
</style>
<div class="box"></div>
</textarea>
<button onclick="runCode('code2', 'output2')">Run Code</button>
<iframe id="output2"></iframe>
<h3>III. Animation Timing Functions</h3>
<p><strong>Explanation:</strong> Timing functions define karti hain animation ki speed curve — jaise slow start, fast end, etc.
<ul>
<li><code>linear</code></li>
<li><code>ease</code></li>
<li><code>ease-in</code></li>
<li><code>ease-out</code></li>
<li><code>ease-in-out</code></li>
</ul>
</p>
<textarea id="code3">
<style>
@keyframes bounce {
0% { transform: translateY(0); }
50% { transform: translateY(-60px); }
100% { transform: translateY(0); }
}
.ball {
width: 50px;
height: 50px;
background: crimson;
border-radius: 50%;
animation: bounce 1s ease-in-out infinite;
}
</style>
<div class="ball"></div>
</textarea>
<button onclick="runCode('code3', 'output3')">Run Code</button>
<iframe id="output3"></iframe>
<h3>IV. Infinite Loop Animations</h3>
<p><strong>Explanation:</strong> Jab aapko animation continuously chahiye ho, to <code>animation-iteration-count: infinite;</code> use karte hain.</p>
<textarea id="code4">
<style>
@keyframes rotate360 {
from { transform: rotate(0deg); }
to { transform: rotate(360deg); }
}
.loader {
width: 60px;
height: 60px;
border: 6px solid lightgray;
border-top: 6px solid #1cc9be;
border-radius: 50%;
animation: rotate360 1s linear infinite;
}
</style>
<div class="loader"></div>
</textarea>
<button onclick="runCode('code4', 'output4')">Run Code</button>
<iframe id="output4"></iframe>
</div>
<script>
function runCode(textareaId, iframeId) {
const code = document.getElementById(textareaId).value;
const iframe = document.getElementById(iframeId);
const doc = iframe.contentDocument || iframe.contentWindow.document;
doc.open();
doc.write(code);
doc.close();
}
</script>
</body>
</html>