JSFiddle - React, Tailwind, and code Playground

by wuchengyang

HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>貓咪熱量計算機</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            min-height: 100vh;
            margin: 0;
            background-color: #f9f9f9;
        }
        .calculator-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
            background: #ffffff;
            padding: 20px;
            border: 2px solid #ddd;
            border-radius: 10px;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }
        input {
            width: 150px;
            padding: 5px;
            font-size: 16px;
            text-align: center;
            border: 1px solid #ccc;
            border-radius: 5px;
        }
        button {
            padding: 10px 20px;
            font-size: 16px;
            background-color: #007bff;
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
        }
        button:hover {
            background-color: #0056b3;
        }
        .result {
            font-size: 18px;
            font-weight: bold;
            color: #333;
        }
    </style>
</head>
<body>
    <div class="calculator-container">
        <input type="number" id="weight" placeholder="貓咪體重(kg)">
        <button onclick="calculateCalories()">計算熱量</button>
        <div class="result" id="result">每日熱量：0 kcal</div>
    </div>

    <script>
        function calculateCalories() {
            const weight = parseFloat(document.getElementById('weight').value);
            if (isNaN(weight) || weight <= 0) {
                document.getElementById('result').innerText = "請輸入有效的體重";
                return;
     ...