Untitled

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>Document</title>
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.5.3/dist/css/bootstrap.min.css" integrity="sha384-TX8t27EcRE3e/ihU7zmQxVncDAy5uIKz4rEkgIXeMed4M0jlfIDPvg6uqKI2xXr2" crossorigin="anonymous">
    <script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous"></script>
    <script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.1/dist/umd/popper.min.js" integrity="sha384-9/reFTGAW83EW2RDu2S0VKaIzap3H66lZH81PoYlFhbGU+6BZp6G7niu735Sk7lN" crossorigin="anonymous"></script>
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@4.5.3/dist/js/bootstrap.min.js" integrity="sha384-w1Q4orYjBQndcko6MimVbzY0tgp4pWB4lZ7lr30WKz0vr/aWKhXdBNmNb5D92v7s" crossorigin="anonymous"></script>

  <script>
    document.addEventListener("DOMContentLoaded", function(event){
      const canvas = document.getElementById('canvasId');
      const canvasId = canvas.getContext('2d');

      const rectangle = new Path2D();
      rectangle.rect(150, 75, 150, 50);
      canvasId.fillStyle = 'red';
      canvasId.fill(rectangle);

      document.addEventListener('mousemove', function(evt) {
        mouse = mouse_player1(evt, canvas);
        if (canvasId.isPointInPath(rectangle, mouse.x, mouse.y)) {
          canvasId.fillStyle = 'green';
        }
        else {
          canvasId.fillStyle = 'red';
        }

        canvasId.clearRect(0, 0, canvas.width, canvas.height);
        canvasId.fill(rectangle);
      });
    });

    const mouse_player1 = (evt, canvas) => {
      var rect = canvas.getBoundingClientRect(); // взима позицията на платното в документа, в случай, че то не започва от горния ляв ъгъл
      var mouseX = evt.clientX - rect.left; // позицията на курсора по хоризонтала
      var mouseY = evt.clientY - rect.top; // позиията на курсора по вертикала
      return {
        x: mouseX,
        y: mouseY,
      } // фунцкията връша два параметъра, x и y
    }

    </script>
  <style type="text/css">
  #canvasId{
    background: black;
  }
  </style>
</head>
  <body>
    <canvas id="canvasId" class="d-block" width="700" height="600"></canvas>
  </body>
</html>