HS-Full-Stack/index.html at master · iOmKumar30/HS-Full-Stack · 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>Simple Sum Calculator</title>
    <style>
        body {
            font-family: 'Roboto', sans-serif;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            height: 100vh;
            background: linear-gradient(135deg, #ffcc70, #ff6f69);
            margin: 0;
            color: #333;
        }

        .container {
            background: white;
            width: 350px;
            padding: 50px;
            border-radius: 12px;
            box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
            text-align: center;
        }

        h1 {
            font-size: 28px;
            color: #444;
            margin-bottom: 20px;
            text-transform: uppercase;
            letter-spacing: 1.5px;
        }

        input {
            width: 80%;
            padding: 15px;
            margin: 10px 0;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-size: 16px;
            text-align: center;
            outline: none;
            transition: border-color 0.2s ease-in-out;
        }

        input:focus {
            border-color: #007bff;
        }

        button {
            padding: 15px 30px;
            margin: 20px 0;
            background-color: #007bff;
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 18px;
            cursor: pointer;
            transition: transform 0.1s ease-in-out, background-color 0.1s ease;
        }

        button:hover {
            background-color: #0056b3;
        }

        button:active {
            transform: scale(1.05);
        }

        #result {
            font-size: 22px;
            margin: 0px auto;
            padding: 15px;
            border: 1px solid #ccc;
            border-radius: 8px;
            width: 90%;
            text-align: center;
            background-color: #e9ecef;
            transition: background-color 0.25s ease-in-out, transform 0.2s ease-in-out;
        }
    </style>
</head>

<body>
    <div class="container">
        <h1>Add Two Numbers</h1>
        <input id="num1" placeholder="Enter first number">
        <input id="num2" placeholder="Enter second number">
        <button onclick="calculateSum()">Calculate Sum</button>
        <div id="result">Result: </div>
    </div>

    <script>
        function getRandomColor() {
            var letters = '0123456789ABCDEF';
            var color = '#';
            for (var i = 0; i < 6; i++) {
                color += letters[Math.floor(Math.random() * 16)];
            }
            return color;
        }

        async function calculateSum() {
            var num1 = document.getElementById('num1').value;
            var num2 = document.getElementById('num2').value;
            try {
                const response = await fetch('http://localhost:3000/calculate', {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json'
                    },
                    body: JSON.stringify({ num1, num2 })
                });

                const data = await response.json();
                var result = document.getElementById('result');
                result.innerText = 'Result: ' + data.sum;
                result.style.backgroundColor = getRandomColor();
                result.style.transform = 'scale(1.1)';
                setTimeout(function () {
                    result.style.transform = 'scale(1)';
                }, 200);
                document.getElementById('num1').focus();
                document.getElementById('num1').value = '';
                document.getElementById('num2').value = '';
            } catch (err) {
                console.log(err);
            }
        }

        function handleEnterKey(event, nextElementId) {
            if (event.key === "Enter") {
                if (nextElementId) {
                    document.getElementById(nextElementId).focus();
                } else {
                    calculateSum();
                }
            }
        }

        document.getElementById('num1').addEventListener('keydown', function (event) {
            handleEnterKey(event, 'num2');
        });

        document.getElementById('num2').addEventListener('keydown', function (event) {
            handleEnterKey(event, null);
        });

        document.addEventListener('DOMContentLoaded', function () {
            document.getElementById('num1').focus();
        });
    </script>
</body>

</html>