http-module/index.html at main · liangdengwang/http-module · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Calculator API</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            max-width: 600px;
            margin: 40px auto;
            padding: 20px;
            background-color: #f5f5f5;
        }
        .calculator {
            background-color: white;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }
        .form-group {
            margin-bottom: 15px;
        }
        label {
            display: block;
            margin-bottom: 5px;
            color: #333;
        }
        input, select {
            width: 100%;
            padding: 8px;
            border: 1px solid #ddd;
            border-radius: 4px;
            box-sizing: border-box;
        }
        button {
            background-color: #4CAF50;
            color: white;
            padding: 10px 15px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            width: 100%;
        }
        button:hover {
            background-color: #45a049;
        }
        .result {
            margin-top: 20px;
            padding: 15px;
            border-radius: 4px;
        }
        .success {
            background-color: #dff0d8;
            color: #3c763d;
            border: 1px solid #d6e9c6;
        }
        .error {
            background-color: #f2dede;
            color: #a94442;
            border: 1px solid #ebccd1;
        }
    </style>
</head>
<body>
    <div class="calculator">
        <h2>Calculator API</h2>
        <form id="calculatorForm">
            <div class="form-group">
                <label for="num1">First Number:</label>
                <input type="number" id="num1" name="num1" required step="any">
            </div>
            <div class="form-group">
                <label for="operator">Operator:</label>
                <select id="operator" name="operator" required>
                    <option value="add">Add (+)</option>
                    <option value="subtract">Subtract (-)</option>
                    <option value="multiply">Multiply (×)</option>
                    <option value="divide">Divide (÷)</option>
                </select>
            </div>
            <div class="form-group">
                <label for="num2">Second Number:</label>
                <input type="number" id="num2" name="num2" required step="any">
            </div>
            <button type="submit">Calculate</button>
        </form>
        <div id="result" class="result" style="display: none;"></div>
    </div>

    <script>
        document.getElementById('calculatorForm').addEventListener('submit', async (e) => {
            e.preventDefault();

            const num1 = document.getElementById('num1').value;
            const num2 = document.getElementById('num2').value;
            const operator = document.getElementById('operator').value;
            const resultDiv = document.getElementById('result');

            try {
                const response = await fetch(`http://localhost:3000?num1=${num1}&num2=${num2}&operator=${operator}`);
                const data = await response.json();

                resultDiv.style.display = 'block';
                if (data.status === 'success') {
                    resultDiv.className = 'result success';
                    resultDiv.textContent = `Result: ${data.result}`;
                } else {
                    resultDiv.className = 'result error';
                    resultDiv.textContent = `Error: ${data.message}`;
                }
            } catch (error) {
                resultDiv.style.display = 'block';
                resultDiv.className = 'result error';
                resultDiv.textContent = `Error: Could not connect to the server`;
            }
        });
    </script>
</body>
</html>