HTML DOM MouseEvent screenY Property

The HTML DOM MouseEvent screenY property returns the vertical (y) coordinate of the mouse pointer relative to the users screen display if a mouse event was triggered. Use with screenY to get the horizontal coordinate as well.

Following is the syntax −

Returning reference to the screenY object

MouseEventObject.screenY

Let us see an example of MouseEvent screenY property −

Example

Live Demo

<!DOCTYPE html>
<html>
<head>
<title>MouseEvent screenY</title>
<style>
   * {
      padding: 2px;
      margin:5px;
   }
   form {
      width:70%;
      margin: 0 auto;
      text-align: center;
   }
   #outer {
      width:70%;
      margin: 0 auto;
      padding: 0;
      text-align: center;
      border:1px solid black;
      height: 105px;
      background-color: #28a745;
   }
   input[type="button"] {
      border-radius: 10px;
   }
   #upper {
      border-bottom: 1px solid black;
      height: 40px;
      margin: 0 0 15px 0;
      background-color: #DC3545;
   }
   #lower {
      border-top: 1px solid black;
      height: 40px;
      margin: 15px 0 0 0;
      background-color: #DC3545;
   }
</style>
</head>
<body>
<form>
   <fieldset>
      <legend>MouseEvent-screenY</legend>
         <div id="outer">
         <div id="upper"><h2>Danger</h2></div>
         <div id="lower"><h2>Danger</h2></div>
         </div>
         <input type="button" id="start" value="Start" onclick="gameStart()">
         <div id="divDisplay"></div>
      </fieldset>
   </form>
<script>
   var divDisplay = document.getElementById('divDisplay');
   var gameDisplay = document.getElementById('outer');
   function playGame(event) {
      var x = event.screenX;
      var y = event.screenY;
         if(y > 330 && y < 345){
            divDisplay.textContent = 'Keep Going!';
               if(x === 1171){
                  divDisplay.textContent = 'Congrats! You Did it!';
                  gameDisplay.removeEventListener('mousemove', playGame);
               }
         }
         else{
            divDisplay.textContent = 'You moved to DANGER area. You loose!';
            gameDisplay.removeEventListener('mousemove', playGame);
      }
   }
   function gameStart(){
      gameDisplay.addEventListener('mousemove',playGame);
   }
</script>
</body>
</html>