JavaScript DOM MouseEvent property: screenY
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The screenY property
of MouseEvent
objects within the JavaScript
DOM (i.e.
events triggered by an action with the mouse) returns the vertical coordinate
of the mouse pointer (relative to the screen).
EXAMPLE:
HTML USED IN THIS EXAMPLE:
<!DOCTYPE html>
<html> <!-- Copyright (c) Nematrian Limited 2018 -->
<head></head>
<body>
Try clicking on this box:
<p style="background-color: yellow; border: 2px solid black; width: 200px; height: 100px;"
onmousedown="myOnmousedown(event)"><br><br></p>
MouseEvent outcomes are:<br><br>
altKey: <b id="mouse1"></b><br>
button (usually 0 = left, 1 = middle, 2 = right): <b id="mouse2"></b><br>
buttons (usually sum of 1 = left, 2 = right, 4 = middle, 8 = back, 16 = forward):
<b id="mouse3"></b><br>
clientX: <b id="mouse4"></b><br>
clientY: <b id="mouse5"></b><br>
ctrlKey: <b id="mouse6"></b><br>
detail: <b id="mouse7"></b><br>
metaKey: <b id="mouse8"></b><br>
pageX: <b id="mouse9"></b><br>
pageY: <b id="mouse10"></b><br>
relatedTarget: <b id="mouse11"></b><br>
screenX: <b id="mouse12"></b><br>
screenY: <b id="mouse13"></b><br>
shiftKey: <b id="mouse14"></b><br>
which: <b id="mouse15"></b><br>
<script>
function myOnmousedown(event) {
document.getElementById("mouse1").innerHTML = event.altKey;
document.getElementById("mouse2").innerHTML = event.button;
document.getElementById("mouse3").innerHTML = event.buttons;
document.getElementById("mouse4").innerHTML = event.clientX;
document.getElementById("mouse5").innerHTML = event.clientY;
document.getElementById("mouse6").innerHTML = event.ctrlKey;
document.getElementById("mouse7").innerHTML = event.detail;
document.getElementById("mouse8").innerHTML = event.metaKey;
document.getElementById("mouse9").innerHTML = event.pageX;
document.getElementById("mouse10").innerHTML = event.pageY;
document.getElementById("mouse11").innerHTML = event.relatedTarget;
document.getElementById("mouse12").innerHTML = event.screenX;
document.getElementById("mouse13").innerHTML = event.screenY;
document.getElementById("mouse14").innerHTML = event.shiftKey;
document.getElementById("mouse15").innerHTML = event.which;
}
</script>
</body>
</html>
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