Exploding like buttonOne-line

Gemini 3.1 Flash Lite

by GoogleReasoningClean

Open in new window

Running live in a sandboxed frame. Click inside it before using the keyboard.

How it went

Total time: 3.2 s
Cost: $0.0016
Output tokens: 1,005
Spent thinking: 0 tokens
Speed: 390.4 tok/s
Console errors: 0

First token after: 629 ms
First visible text after: 629 ms
Prompt tokens: 362
Code size: 2.9 KB
Finish reason: stop
Served by: Google
Model id: google/gemini-3.1-flash-lite
Reasoning sent: {"effort":"minimal"}
Max output: 65,536 tokens
Generated: Nov 12, 2026

What it was asked

The prompt

“a "like" button in pure CSS, no JavaScript, that does a crazy animation when you click it”

System prompt, sent with every prompt

You are generating a self-contained web demo. It will be rendered automatically in a sandboxed iframe and compared side by side with the output of other AI models given the exact same task.

Output rules:
- Reply with exactly ONE fenced code block containing the complete file: ```html (or ```svg when the task asks for an SVG). No text before or after the code block.
- Everything must be inline: CSS in <style>, JavaScript in <script>. No external files, images, fonts or network requests, except the CDN URLs explicitly allowed by the task.
- Do not use localStorage, sessionStorage, cookies, IndexedDB, alert(), confirm(), prompt() or window.open(): they are blocked in the sandbox and will throw.
- The page must look right in a 1280×800 viewport and adapt gracefully down to 375px wide. No horizontal scrollbar.
- Something meaningful must be visible on first paint: a screenshot is taken automatically about 3 seconds after load, without any interaction.
- Everything that makes the demo interesting must be visible within the first seconds: nothing hidden behind a high score, a later level or a long play session.
- Games must start in a self-playing demo mode (a simple AI plays) behind a "Click or press a key to start" message, so the game can be judged in action without playing.
- The iframe only receives keyboard events after the user clicks it: if the demo uses the keyboard, display a clear "Click or press a key to start" message.
- The code must run with zero errors in the console of the latest Chrome.

Code run-1.html · 107 lines

Download

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>CSS Only Like Button</title>
    <style>
        body {
            margin: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            background: #f0f2f5;
            font-family: sans-serif;
        }

        .like-container {
            position: relative;
        }

        input[type="checkbox"] {
            display: none;
        }

        .like-btn {
            cursor: pointer;
            width: 80px;
            height: 80px;
            background: #fff;
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
            position: relative;
            z-index: 2;
        }

        .heart {
            width: 40px;
            height: 40px;
            background: #ccc;
            clip-path: path('M20 38c-8-6-16-12-16-20a8 8 0 0 1 16-4 8 8 0 0 1 16 4c0 8-8 14-16 20z');
            transition: background 0.3s ease;
        }

        /* The Animation Overlay */
        .particles {
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            pointer-events: none;
        }

        /* Magic trigger */
        input:checked ~ .like-btn .heart {
            background: #ff4757;
            animation: pop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        }

        input:checked ~ .particles::before,
        input:checked ~ .particles::after {
            content: '';
            position: absolute;
            width: 10px;
            height: 10px;
            background: #ff4757;
            border-radius: 50%;
            animation: explode 0.8s ease-out forwards;
        }

        @keyframes pop {
            0% { transform: scale(1); }
            50% { transform: scale(1.4); }
            100% { transform: scale(1); }
        }

        @keyframes explode {
            0% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
            100% { transform: translate(-50%, -50%) scale(0) rotate(360deg); opacity: 0; box-shadow: -50px -50px 0 #ff4757, 50px -50px 0 #ff4757, -50px 50px 0 #ff4757, 50px 50px 0 #ff4757, 0 -70px 0 #ff4757, 0 70px 0 #ff4757; }
        }

        .hint {
            position: absolute;
            bottom: -50px;
            color: #888;
            font-size: 14px;
        }
    </style>
</head>
<body>

    <div class="like-container">
        <input type="checkbox" id="like-toggle">
        <label for="like-toggle" class="like-btn">
            <div class="heart"></div>
        </label>
        <div class="particles"></div>
        <p class="hint">Click the button!</p>
    </div>

</body>
</html>