373 lines
11 KiB
HTML
373 lines
11 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Hello World - Frontend Demo</title>
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<style>
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* {
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margin: 0;
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padding: 0;
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box-sizing: border-box;
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font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
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}
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body {
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background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
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min-height: 100vh;
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display: flex;
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justify-content: center;
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align-items: center;
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padding: 20px;
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}
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.container {
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background: rgba(255, 255, 255, 0.95);
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border-radius: 20px;
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padding: 40px;
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box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
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text-align: center;
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max-width: 600px;
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width: 100%;
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animation: fadeIn 0.8s ease-out;
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}
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@keyframes fadeIn {
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from {
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opacity: 0;
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transform: translateY(20px);
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}
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to {
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opacity: 1;
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transform: translateY(0);
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}
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}
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h1 {
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color: #333;
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font-size: 3.5rem;
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margin-bottom: 20px;
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background: linear-gradient(45deg, #667eea, #764ba2);
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-webkit-background-clip: text;
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-webkit-text-fill-color: transparent;
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background-clip: text;
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}
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.subtitle {
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color: #666;
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font-size: 1.2rem;
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margin-bottom: 30px;
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line-height: 1.6;
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}
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.message-box {
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background: #f8f9fa;
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border-radius: 15px;
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padding: 25px;
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margin: 30px 0;
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border-left: 5px solid #667eea;
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transition: all 0.3s ease;
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}
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.message-box:hover {
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transform: translateY(-5px);
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box-shadow: 0 10px 30px rgba(102, 126, 234, 0.2);
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}
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#dynamic-message {
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font-size: 1.8rem;
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color: #333;
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font-weight: 600;
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min-height: 60px;
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display: flex;
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align-items: center;
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justify-content: center;
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}
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.controls {
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display: flex;
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flex-wrap: wrap;
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gap: 15px;
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justify-content: center;
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margin: 30px 0;
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}
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button {
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background: linear-gradient(45deg, #667eea, #764ba2);
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color: white;
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border: none;
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padding: 12px 24px;
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border-radius: 50px;
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font-size: 1rem;
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font-weight: 600;
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cursor: pointer;
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transition: all 0.3s ease;
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box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
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}
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button:hover {
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transform: translateY(-3px);
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box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
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}
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button:active {
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transform: translateY(0);
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}
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button.secondary {
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background: linear-gradient(45deg, #6c757d, #495057);
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}
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button.danger {
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background: linear-gradient(45deg, #dc3545, #c82333);
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}
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.counter {
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display: flex;
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align-items: center;
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justify-content: center;
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gap: 20px;
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margin: 25px 0;
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}
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.counter-value {
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font-size: 2.5rem;
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font-weight: bold;
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color: #667eea;
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min-width: 60px;
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}
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.features {
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display: grid;
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grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
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gap: 20px;
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margin-top: 30px;
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}
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.feature {
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background: white;
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padding: 20px;
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border-radius: 15px;
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box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
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transition: transform 0.3s ease;
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}
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.feature:hover {
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transform: translateY(-5px);
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}
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.feature h3 {
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color: #667eea;
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margin-bottom: 10px;
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}
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.feature p {
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color: #666;
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font-size: 0.9rem;
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}
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footer {
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margin-top: 40px;
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color: #888;
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font-size: 0.9rem;
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border-top: 1px solid #eee;
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padding-top: 20px;
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}
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@media (max-width: 768px) {
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.container {
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padding: 25px;
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}
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h1 {
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font-size: 2.5rem;
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}
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.controls {
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flex-direction: column;
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}
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button {
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width: 100%;
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}
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}
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</style>
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</head>
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<body>
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<div class="container">
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<h1>Hello World!</h1>
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<p class="subtitle">
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Welcome to this interactive frontend demo. This page demonstrates modern CSS styling,
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JavaScript interactivity, and responsive design principles.
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</p>
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<div class="message-box">
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<div id="dynamic-message">Welcome to the interactive demo!</div>
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</div>
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<div class="controls">
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<button id="change-message">Change Message</button>
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<button id="toggle-color" class="secondary">Toggle Theme</button>
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<button id="reset" class="danger">Reset</button>
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</div>
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<div class="counter">
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<button id="decrement">-</button>
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<div class="counter-value" id="counter">0</div>
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<button id="increment">+</button>
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</div>
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<div class="features">
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<div class="feature">
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<h3>Responsive Design</h3>
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<p>Adapts to all screen sizes from mobile to desktop</p>
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</div>
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<div class="feature">
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<h3>Modern CSS</h3>
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<p>Uses gradients, animations, and flexbox</p>
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</div>
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<div class="feature">
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<h3>Interactive JS</h3>
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<p>Dynamic content updates and event handling</p>
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</div>
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</div>
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<footer>
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<p>Created with ❤️ by Frontend Engineer | OpenClaw Multi-Agent System</p>
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<p id="timestamp"></p>
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</footer>
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</div>
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<script>
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// DOM Elements
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const dynamicMessage = document.getElementById('dynamic-message');
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const counterElement = document.getElementById('counter');
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const timestampElement = document.getElementById('timestamp');
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// State
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let counter = 0;
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let isDarkTheme = false;
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// Messages array
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const messages = [
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"Hello World! 🌍",
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"Welcome to Frontend Development! 💻",
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"CSS is awesome! 🎨",
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"JavaScript makes things interactive! ⚡",
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"Have a great day! 😊",
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"Keep coding! 👨💻",
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"Learning every day! 📚",
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"Frontend magic! ✨"
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];
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// Initialize
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function init() {
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updateTimestamp();
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updateCounter();
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// Event Listeners
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document.getElementById('change-message').addEventListener('click', changeMessage);
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document.getElementById('toggle-color').addEventListener('click', toggleTheme);
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document.getElementById('reset').addEventListener('click', resetAll);
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document.getElementById('increment').addEventListener('click', () => updateCounter(1));
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document.getElementById('decrement').addEventListener('click', () => updateCounter(-1));
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// Add some initial animation
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setTimeout(() => {
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dynamicMessage.style.transform = 'scale(1.05)';
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setTimeout(() => {
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dynamicMessage.style.transform = 'scale(1)';
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}, 300);
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}, 500);
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}
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// Update timestamp
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function updateTimestamp() {
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const now = new Date();
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timestampElement.textContent = `Loaded: ${now.toLocaleString()}`;
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}
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// Change message
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function changeMessage() {
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const randomIndex = Math.floor(Math.random() * messages.length);
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const newMessage = messages[randomIndex];
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// Animation
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dynamicMessage.style.opacity = '0';
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dynamicMessage.style.transform = 'translateY(10px)';
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setTimeout(() => {
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dynamicMessage.textContent = newMessage;
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dynamicMessage.style.opacity = '1';
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dynamicMessage.style.transform = 'translateY(0)';
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}, 300);
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}
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// Update counter
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function updateCounter(value = 0) {
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counter += value;
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counterElement.textContent = counter;
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// Visual feedback
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if (value > 0) {
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counterElement.style.color = '#28a745';
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counterElement.style.transform = 'scale(1.2)';
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} else if (value < 0) {
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counterElement.style.color = '#dc3545';
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counterElement.style.transform = 'scale(0.8)';
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}
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setTimeout(() => {
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counterElement.style.transform = 'scale(1)';
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counterElement.style.color = '#667eea';
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}, 300);
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}
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// Toggle theme
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function toggleTheme() {
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isDarkTheme = !isDarkTheme;
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const body = document.body;
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const container = document.querySelector('.container');
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if (isDarkTheme) {
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body.style.background = 'linear-gradient(135deg, #2c3e50 0%, #1a1a2e 100%)';
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container.style.background = 'rgba(40, 44, 52, 0.95)';
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container.style.color = '#f8f9fa';
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} else {
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body.style.background = 'linear-gradient(135deg, #667eea 0%, #764ba2 100%)';
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container.style.background = 'rgba(255, 255, 255, 0.95)';
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container.style.color = '#333';
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}
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}
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// Reset everything
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function resetAll() {
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counter = 0;
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isDarkTheme = false;
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// Reset counter
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counterElement.textContent = counter;
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// Reset message
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dynamicMessage.textContent = 'Welcome to the interactive demo!';
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// Reset theme
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document.body.style.background = 'linear-gradient(135deg, #667eea 0%, #764ba2 100%)';
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document.querySelector('.container').style.background = 'rgba(255, 255, 255, 0.95)';
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document.querySelector('.container').style.color = '#333';
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// Animation
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dynamicMessage.style.opacity = '0';
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setTimeout(() => {
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dynamicMessage.style.opacity = '1';
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}, 300);
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updateTimestamp();
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}
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// Initialize on load
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document.addEventListener('DOMContentLoaded', init);
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</script>
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</body>
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</html> |