Web-Dev-Intro/3_add_javascript.html at main · Jojobeans1981/Web-Dev-Intro · 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>Adding Interactivity with JavaScript</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            max-width: 800px;
            margin: 0 auto;
            padding: 20px;
        }
        button {
            padding: 10px 15px;
            margin: 5px;
            background-color: #4CAF50;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
        }
        button:hover {
            background-color: #45a049;
        }
    </style>
</head>
<body>
    <h1>JavaScript Interactive Page</h1>

    <p id="welcome-text">Welcome to our interactive page!</p>

    <button onclick="changeText()">Change Welcome Text</button>
    <button onclick="showAlert()">Click for Alert</button>
    <button onclick="changeColor()">Change Background Color</button>

    <div>
        <h2>Counter: <span id="counter">0</span></h2>
        <button onclick="increaseCounter()">Increase Counter</button>
        <button onclick="resetCounter()">Reset Counter</button>
    </div>

    <script>
        // STUDENT: Add your JavaScript code below this line

        function changeText() {
            // Get the paragraph element and change its text
            document.getElementById('welcome-text').innerHTML = 'You changed the text! Great job!';
        }

        function showAlert() {
            // Create a popup alert
            alert('Hello! This is a JavaScript alert!');
        }

        function changeColor() {
            // Change the background color of the page
            const colors = ['#f0f8ff', '#fff0f5', '#f0fff0', '#fff8dc'];
            const randomColor = colors[Math.floor(Math.random() * colors.length)];
            document.body.style.backgroundColor = randomColor;
        }

        function increaseCounter() {
            // Increase the counter by 1
            let currentCount = parseInt(document.getElementById('counter').textContent);
            document.getElementById('counter').textContent = currentCount + 1;
        }

        function resetCounter() {
            // Reset the counter to 0
            document.getElementById('counter').textContent = '0';
        }

        // BONUS: Can you create a function that changes the heading color when called?

    </script>
</body>
</html>