Exploding like buttonOne-line

Gemini 3.1 Flash Lite

by GoogleReasoningClean

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

How it went

Total time: 3.2 s
Cost: $0.0017
Output tokens: 1,044
Spent thinking: 0 tokens
Speed: 431.8 tok/s
Console errors: 0

First token after: 743 ms
First visible text after: 743 ms
Prompt tokens: 362
Code size: 3.3 KB
Finish reason: stop
Served by: Google
Model id: google/gemini-3.1-flash-lite
Reasoning sent: model default
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 · 125 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: #0f172a;
            font-family: sans-serif;
            overflow: hidden;
        }

        /* Hidden checkbox acts as the state holder */
        .like-input {
            display: none;
        }

        .like-container {
            position: relative;
            cursor: pointer;
            user-select: none;
        }

        .heart {
            width: 100px;
            height: 100px;
            background: #334155;
            position: relative;
            transform: rotate(-45deg);
            transition: background 0.3s ease;
        }

        .heart::before, .heart::after {
            content: '';
            width: 100px;
            height: 100px;
            background: inherit;
            border-radius: 50%;
            position: absolute;
        }

        .heart::before { top: -50px; left: 0; }
        .heart::after { top: 0; left: 50px; }

        /* Particles */
        .particles {
            position: absolute;
            top: 50%;
            left: 50%;
            pointer-events: none;
        }

        .particle {
            position: absolute;
            width: 10px;
            height: 10px;
            background: #f43f5e;
            border-radius: 50%;
            opacity: 0;
        }

        /* Trigger Animation on Check */
        .like-input:checked + .like-container .heart {
            background: #f43f5e;
            animation: pulse 0.6s ease-out;
        }

        .like-input:checked + .like-container .particle {
            animation: explode 0.8s ease-out forwards;
        }

        @keyframes pulse {
            0% { transform: rotate(-45deg) scale(1); }
            50% { transform: rotate(-45deg) scale(1.3); }
            100% { transform: rotate(-45deg) scale(1); }
        }

        @keyframes explode {
            0% { transform: translate(0,0) scale(1); opacity: 1; }
            100% { transform: translate(var(--x), var(--y)) scale(0); opacity: 0; }
        }

        /* Scatter particles in a circle */
        .p1 { --x: -60px; --y: -80px; }
        .p2 { --x: 60px; --y: -80px; }
        .p3 { --x: 80px; --y: 0px; }
        .p4 { --x: 0px; --y: 80px; }
        .p5 { --x: -80px; --y: 0px; }
        .p6 { --x: 40px; --y: 40px; }

        .hint {
            position: absolute;
            bottom: 50px;
            color: #94a3b8;
            font-size: 1.2rem;
            pointer-events: none;
        }
    </style>
</head>
<body>

    <input type="checkbox" id="like" class="like-input">
    <label for="like" class="like-container">
        <div class="heart">
            <div class="particles">
                <div class="particle p1"></div>
                <div class="particle p2"></div>
                <div class="particle p3"></div>
                <div class="particle p4"></div>
                <div class="particle p5"></div>
                <div class="particle p6"></div>
            </div>
        </div>
    </label>

    <div class="hint">Click to explode!</div>

</body>
</html>