JavaScript-Learning-Repository/playground.html at main · sharada-marasinghe/JavaScript-Learning-Repository · 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>JavaScript Playground - Interactive Code Editor</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <script>
        tailwind.config = {
            theme: {
                extend: {
                    colors: {
                        'edu-blue': '#3B82F6',
                        'edu-green': '#10B981',
                        'edu-purple': '#8B5CF6',
                        'edu-yellow': '#F59E0B',
                        'edu-bg': '#F9FAFB',
                        'edu-text': '#374151'
                    }
                }
            }
        }
    </script>
    <link rel="stylesheet" href="css/educational-theme.css">
    <style>
        .code-editor {
            background: #1F2937;
            border: 1px solid #374151;
            border-radius: 8px;
            padding: 1rem;
            font-family: 'JetBrains Mono', 'Fira Code', 'Monaco', 'Consolas', monospace;
            color: #F9FAFB;
            resize: none;
            width: 100%;
            min-height: 400px;
            line-height: 1.5;
        }

        .output-panel {
            background: #111827;
            border: 1px solid #374151;
            border-radius: 8px;
            padding: 1rem;
            font-family: 'JetBrains Mono', 'Fira Code', 'Monaco', 'Consolas', monospace;
            color: #10B981;
            min-height: 200px;
            overflow-y: auto;
            white-space: pre-wrap;
        }

        .example-tab {
            transition: all 0.3s ease;
        }

        .example-tab.active {
            background: #3B82F6;
            color: white;
        }
    </style>
</head>

<body class="bg-edu-bg text-edu-text">
    <!-- Navigation -->
    <nav class="bg-white shadow-lg fixed w-full z-50">
        <div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
            <div class="flex justify-between h-16">
                <div class="flex items-center">
                    <div class="flex-shrink-0 flex items-center">
                        <a href="index.html" class="flex items-center">
                            <span class="text-2xl font-bold text-edu-blue">JS</span>
                            <span class="text-2xl font-bold text-edu-purple ml-1">Learning Hub</span>
                        </a>
                    </div>
                </div>
                <div class="hidden md:flex items-center space-x-8">
                    <a href="index.html" class="text-gray-700 hover:text-edu-blue transition-colors">Home</a>
                    <a href="lessons.html" class="text-gray-700 hover:text-edu-blue transition-colors">Lessons</a>
                    <a href="playground.html" class="text-edu-blue font-semibold">Playground</a>
                    <a href="#exercises" class="text-gray-700 hover:text-edu-blue transition-colors">Exercises</a>
                </div>
            </div>
        </div>
    </nav>

    <!-- Header -->
    <section class="pt-20 pb-8 bg-gradient-to-r from-edu-green to-edu-blue">
        <div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 text-center text-white">
            <h1 class="text-4xl md:text-5xl font-bold mb-4">JavaScript Playground</h1>
            <p class="text-xl opacity-90 max-w-3xl mx-auto">
                Write, test, and experiment with JavaScript code in real-time. Perfect for learning and prototyping!
            </p>
        </div>
    </section>

    <!-- Main Playground -->
    <section class="py-8">
        <div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
            <!-- Toolbar -->
            <div class="bg-white rounded-lg shadow-md p-4 mb-6">
                <div class="flex flex-wrap items-center justify-between gap-4">
                    <div class="flex flex-wrap gap-2">
                        <button onclick="runCode()"
                            class="bg-edu-green text-white px-4 py-2 rounded-lg hover:bg-green-600 transition-colors flex items-center gap-2">
                            ▶ Run Code
                        </button>
                        <button onclick="clearCode()"
                            class="bg-gray-500 text-white px-4 py-2 rounded-lg hover:bg-gray-600 transition-colors">
                            🗑️ Clear
                        </button>
                        <button onclick="formatCode()"
                            class="bg-edu-blue text-white px-4 py-2 rounded-lg hover:bg-blue-600 transition-colors">
                            ✨ Format
                        </button>
                        <button onclick="shareCode()"
                            class="bg-edu-purple text-white px-4 py-2 rounded-lg hover:bg-purple-600 transition-colors">
                            📤 Share
                        </button>
                    </div>
                    <div class="flex items-center gap-4">
                        <select id="fontSize" onchange="changeFontSize()"
                            class="border border-gray-300 rounded px-3 py-1">
                            <option value="12">12px</option>
                            <option value="14" selected>14px</option>
                            <option value="16">16px</option>
                            <option value="18">18px</option>
                        </select>
                        <label class="flex items-center gap-2">
                            <input type="checkbox" id="autoRun" onchange="toggleAutoRun()">
                            <span class="text-sm">Auto Run</span>
                        </label>
                    </div>
                </div>
            </div>

            <!-- Code Examples Tabs -->
            <div class="bg-white rounded-lg shadow-md mb-6">
                <div class="border-b border-gray-200 p-4">
                    <h3 class="text-lg font-semibold mb-3">📚 Quick Examples</h3>
                    <div class="flex flex-wrap gap-2" id="example-tabs">
                        <!-- Tabs will be populated by JavaScript -->
                    </div>
                </div>
            </div>

            <!-- Editor and Output Grid -->
            <div class="grid lg:grid-cols-2 gap-6">
                <!-- Code Editor -->
                <div class="bg-white rounded-lg shadow-md">
                    <div class="border-b border-gray-200 p-4">
                        <div class="flex items-center justify-between">
                            <h3 class="text-lg font-semibold flex items-center gap-2">
                                💻 JavaScript Editor
                            </h3>
                            <div class="flex items-center gap-2">
                                <span class="text-sm text-gray-500" id="line-count">Line 1</span>
                                <span class="text-sm text-gray-500" id="char-count">0 chars</span>
                            </div>
                        </div>
                    </div>
                    <div class="p-4">
                        <textarea id="code-editor" class="code-editor" placeholder="// Write your JavaScript code here...
console.log('Hello, World!');

// Try some examples:
// Variables
let name = 'JavaScript';
let version = 2024;

// Functions
function greet(name) {
    return `Hello, ${name}!`;
}

// Call the function
let message = greet(name);
console.log(message);

// Arrays and loops
let numbers = [1, 2, 3, 4, 5];
for (let num of numbers) {
    console.log(`Number: ${num}`);
}"></textarea>
                    </div>
                </div>

                <!-- Output Panel -->
                <div class="bg-white rounded-lg shadow-md">
                    <div class="border-b border-gray-200 p-4">
                        <div class="flex items-center justify-between">
                            <h3 class="text-lg font-semibold flex items-center gap-2">
                                📊 Output Console
                            </h3>
                            <button onclick="clearOutput()" class="text-gray-500 hover:text-gray-700">
                                🗑️ Clear
                            </button>
                        </div>
                    </div>
                    <div class="p-4">
                        <div id="output-panel" class="output-panel">
                            Welcome to the JavaScript Playground!
                            Click "Run Code" to execute your JavaScript code.
                        </div>
                    </div>
                </div>
            </div>

            <!-- Tips Section -->
            <div class="mt-8 bg-white rounded-lg shadow-md p-6">
                <h3 class="text-lg font-semibold mb-4 flex items-center gap-2">
                    💡 Playground Tips
                </h3>
                <div class="grid md:grid-cols-2 lg:grid-cols-3 gap-4">
                    <div class="p-4 bg-blue-50 rounded-lg">
                        <h4 class="font-semibold text-edu-blue mb-2">Console Output</h4>
                        <p class="text-sm text-gray-600">Use <code>console.log()</code> to display results in the output
                            panel.</p>
                    </div>
                    <div class="p-4 bg-green-50 rounded-lg">
                        <h4 class="font-semibold text-edu-green mb-2">Quick Examples</h4>
                        <p class="text-sm text-gray-600">Click on the example tabs above to load pre-written code
                            snippets.</p>
                    </div>
                    <div class="p-4 bg-purple-50 rounded-lg">
                        <h4 class="font-semibold text-edu-purple mb-2">Auto Run</h4>
                        <p class="text-sm text-gray-600">Enable auto-run to execute code automatically as you type (with
                            delay).</p>
                    </div>
                </div>
            </div>
        </div>
    </section>

    <script>
        // Code examples
        const codeExamples = {
            variables: {
                title: "Variables",
                code: `// Variable declarations
let name = "Alice";
let age = 25;
const PI = 3.14159;

// Output variables
console.log("Name:", name);
console.log("Age:", age);
console.log("PI:", PI);

// Variable operations
let x = 10;
let y = 5;
console.log("x + y =", x + y);
console.log("x * y =", x * y);`
            },
            functions: {
                title: "Functions",
                code: `// Function declaration
function greet(name) {
    return \`Hello, \${name}!\`;
}

// Arrow function
const add = (a, b) => a + b;

// Function calls
console.log(greet("World"));
console.log("5 + 3 =", add(5, 3));

// Function with multiple parameters
function calculateArea(length, width) {
    return length * width;
}

let area = calculateArea(10, 5);
console.log("Area:", area);`
            },
            arrays: {
                title: "Arrays",
                code: `// Array creation
let fruits = ["apple", "banana", "orange"];
let numbers = [1, 2, 3, 4, 5];

console.log("Fruits:", fruits);
console.log("Numbers:", numbers);

// Array methods
fruits.push("grape");
console.log("After push:", fruits);

let doubled = numbers.map(n => n * 2);
console.log("Doubled:", doubled);

// Array iteration
console.log("\\nLoop through fruits:");
for (let fruit of fruits) {
    console.log("-", fruit);
}`
            },
            objects: {
                title: "Objects",
                code: `// Object creation
let person = {
    name: "John Doe",
    age: 30,
    city: "New York",
    hobbies: ["reading", "coding", "gaming"]
};

console.log("Person:", person);
console.log("Name:", person.name);
console.log("Age:", person.age);

// Object methods
person.greet = function() {
    return \`Hi, I'm \${this.name}!\`;
};

console.log(person.greet());

// Adding properties
person.email = "john@example.com";
console.log("Updated person:", person);`
            },
            loops: {
                title: "Loops",
                code: `// For loop
console.log("For loop (1 to 5):");
for (let i = 1; i <= 5; i++) {
    console.log("Count:", i);
}

// While loop
console.log("\\nWhile loop countdown:");
let countdown = 5;
while (countdown > 0) {
    console.log("T-minus", countdown);
    countdown--;
}
console.log("Blast off! 🚀");

// For...of loop
let colors = ["red", "green", "blue"];
console.log("\\nColors:");
for (let color of colors) {
    console.log("-", color);
}`
            },
            conditionals: {
                title: "Conditionals",
                code: `// If statements
let age = 18;
let hasLicense = true;

if (age >= 18 && hasLicense) {
    console.log("You can drive!");
} else if (age >= 18) {
    console.log("You need a license to drive.");
} else {
    console.log("You're too young to drive.");
}

// Switch statement
let day = "Monday";
switch (day) {
    case "Monday":
        console.log("Start of the work week!");
        break;
    case "Friday":
        console.log("TGIF!");
        break;
    case "Saturday":
    case "Sunday":
        console.log("Weekend!");
        break;
    default:
        console.log("Regular weekday");
}

// Ternary operator
let weather = "sunny";
let activity = weather === "sunny" ? "go to the beach" : "stay inside";
console.log("Today's plan:", activity);`
            },
            async: {
                title: "Async/Await",
                code: `// Simulating async operations
function delay(ms) {
    return new Promise(resolve => setTimeout(resolve, ms));
}

async function fetchData() {
    console.log("Fetching data...");
    await delay(1000);
    return { id: 1, name: "Sample Data" };
}

// Using async/await
async function main() {
    try {
        let data = await fetchData();
        console.log("Data received:", data);
    } catch (error) {
        console.log("Error:", error);
    }
}

main();

// Promise example
console.log("Starting promise...");
delay(500).then(() => {
    console.log("Promise resolved after 500ms!");
});`
            }
        };

        let autoRunEnabled = false;
        let autoRunTimeout;

        // Initialize the playground
        function initPlayground() {
            renderExampleTabs();
            updateStats();

            // Add event listeners
            const editor = document.getElementById('code-editor');
            editor.addEventListener('input', () => {
                updateStats();
                if (autoRunEnabled) {
                    clearTimeout(autoRunTimeout);
                    autoRunTimeout = setTimeout(runCode, 1000);
                }
            });

            // Auto-run initial code
            setTimeout(runCode, 500);
        }

        // Render example tabs
        function renderExampleTabs() {
            const tabsContainer = document.getElementById('example-tabs');
            tabsContainer.innerHTML = Object.keys(codeExamples).map(key => `
                <button onclick="loadExample('${key}')"
                        class="example-tab px-4 py-2 rounded-lg border border-gray-300 hover:bg-gray-50 transition-colors">
                    ${codeExamples[key].title}
                </button>
            `).join('');
        }

        // Load example code
        function loadExample(exampleKey) {
            const example = codeExamples[exampleKey];
            if (example) {
                document.getElementById('code-editor').value = example.code;
                updateStats();
                runCode();

                // Update active tab
                document.querySelectorAll('.example-tab').forEach(tab => {
                    tab.classList.remove('active');
                });
                event.target.classList.add('active');
            }
        }

        // Run code function
        function runCode() {
            const code = document.getElementById('code-editor').value;
            const outputPanel = document.getElementById('output-panel');

            // Clear previous output
            outputPanel.innerHTML = '';

            // Capture console.log output
            const originalLog = console.log;
            const originalError = console.error;
            const originalWarn = console.warn;

            const logs = [];

            console.log = (...args) => {
                logs.push({
                    type: 'log',
                    content: args.map(arg =>
                        typeof arg === 'object' ? JSON.stringify(arg, null, 2) : String(arg)
                    ).join(' ')
                });
            };

            console.error = (...args) => {
                logs.push({
                    type: 'error',
                    content: args.map(arg => String(arg)).join(' ')
                });
            };

            console.warn = (...args) => {
                logs.push({
                    type: 'warn',
                    content: args.map(arg => String(arg)).join(' ')
                });
            };

            try {
                // Add timestamp
                logs.push({
                    type: 'info',
                    content: `[${new Date().toLocaleTimeString()}] Code execution started...`
                });

                // Execute the code
                eval(code);

                logs.push({
                    type: 'info',
                    content: `[${new Date().toLocaleTimeString()}] Code execution completed.`
                });

            } catch (error) {
                logs.push({
                    type: 'error',
                    content: `Error: ${error.message}`
                });
            } finally {
                // Restore original console methods
                console.log = originalLog;
                console.error = originalError;
                console.warn = originalWarn;
            }

            // Display output
            if (logs.length > 0) {
                outputPanel.innerHTML = logs.map(log => {
                    let className = 'text-green-400';
                    if (log.type === 'error') className = 'text-red-400';
                    if (log.type === 'warn') className = 'text-yellow-400';
                    if (log.type === 'info') className = 'text-blue-400';

                    return `<div class="${className} mb-1">${log.content}</div>`;
                }).join('');
            } else {
                outputPanel.innerHTML = '<div class="text-gray-400">No output generated</div>';
            }

            // Scroll to bottom
            outputPanel.scrollTop = outputPanel.scrollHeight;
        }

        // Clear code
        function clearCode() {
            document.getElementById('code-editor').value = '';
            clearOutput();
            updateStats();
        }

        // Clear output
        function clearOutput() {
            document.getElementById('output-panel').innerHTML = 'Output cleared. Run your code to see results here.';
        }

        // Format code (basic)
        function formatCode() {
            const editor = document.getElementById('code-editor');
            let code = editor.value;

            // Basic formatting (this is a simple version)
            code = code.replace(/;/g, ';\n');
            code = code.replace(/{/g, ' {\n    ');
            code = code.replace(/}/g, '\n}');
            code = code.replace(/\n\s*\n/g, '\n');

            editor.value = code;
            updateStats();
        }

        // Share code
        function shareCode() {
            const code = document.getElementById('code-editor').value;
            if (navigator.share) {
                navigator.share({
                    title: 'JavaScript Code',
                    text: code
                });
            } else {
                // Fallback: copy to clipboard
                navigator.clipboard.writeText(code).then(() => {
                    alert('Code copied to clipboard!');
                });
            }
        }

        // Change font size
        function changeFontSize() {
            const fontSize = document.getElementById('fontSize').value;
            document.getElementById('code-editor').style.fontSize = fontSize + 'px';
        }

        // Toggle auto run
        function toggleAutoRun() {
            autoRunEnabled = document.getElementById('autoRun').checked;
            if (autoRunEnabled) {
                runCode();
            }
        }

        // Update stats
        function updateStats() {
            const code = document.getElementById('code-editor').value;
            const lines = code.split('\n').length;
            const chars = code.length;

            document.getElementById('line-count').textContent = `Line ${lines}`;
            document.getElementById('char-count').textContent = `${chars} chars`;
        }

        // Keyboard shortcuts
        document.addEventListener('keydown', (e) => {
            if ((e.ctrlKey || e.metaKey) && e.key === 'Enter') {
                e.preventDefault();
                runCode();
            }
            if ((e.ctrlKey || e.metaKey) && e.key === 'k') {
                e.preventDefault();
                clearOutput();
            }
        });

        // Initialize when page loads
        document.addEventListener('DOMContentLoaded', initPlayground);
    </script>
</body>

</html>