<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Mouse Event Example</title>
    <style>
        #colorBox {
            width: 200px;
            height: 200px;
            background-color: lightblue;
            border: 1px solid black;
        }
    </style>
</head>
<body>
    <div id="colorBox"></div>
    <p id="coordinates"></p>
    <script src="script.js"></script>
</body>
</html>
document.addEventListener("DOMContentLoaded", function() {
    const colorBox = document.getElementById("colorBox");
    const coordinates = document.getElementById("coordinates");

    colorBox.addEventListener("mouseover", function() {
        colorBox.style.backgroundColor = "lightgreen";
    });

    colorBox.addEventListener("mouseout", function() {
        colorBox.style.backgroundColor = "lightblue";
    });

    colorBox.addEventListener("mousemove", function(event) {
        coordinates.textContent = `Mouse coordinates: (${event.clientX}, ${event.clientY})`;
    });
});

External CSS

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External JavaScript

This Pen doesn't use any external JavaScript resources.