JSFiddle - React, Tailwind, and code Playground

by ckissi

HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="styles.css">
    <title>Button Animation</title>
</head>
<body>
    <div class="content">
        <!-- Add some content to make the page scrollable -->
        <p>Scroll down the page to see the button animation effect.</p>
        <div style="height: 2000px;"></div>
        <button id="animatedButton" class="button">Click Me</button>
    </div>
    <script src="script.js"></script>
</body>
</html>

CSS

/* styles.css */
body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
}

.content {
    padding: 20px;
}

.button {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 10px 20px;
    background-color: #007BFF;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.5s ease-in-out;
}

.button.animate {
    position: fixed;
    top: 20px;
    right: 20px;
    left: auto;
    transform: none;
}

JavaScript

// script.js
document.addEventListener('DOMContentLoaded', function () {
    const button = document.getElementById('animatedButton');
    
    window.addEventListener('scroll', function () {
        const buttonPosition = button.getBoundingClientRect().bottom;

        if (buttonPosition < window.innerHeight) {
            button.classList.add('animate');
        } else {
            button.classList.remove('animate');
        }
    });
});