Untitled

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <script type="text/javascript">
        document.addEventListener("DOMContentLoaded", () =>{
            let canvas = document.getElementById('canvasId');
            let context = canvas.getContext("2d");

        });

        const mousePlayer1 = (e) => {
            return {
                x: e.layerX,
                y: e.layerY,
            }
        }
    </script>
    <style>
        canvas{
            background-color: black;
        }
    </style>
</head>
<body>
    <canvas width="800" height="800" id="canvasId"></canvas>
</body>
</html>