altkeyThe mouse event property is used to display whether the SHIFT key was pressed when the mouse button was clicked.
You can try running the following code to learn how to implement altKey mouse events in JavaScript.
<!DOCTYPE html>
<html>
<body onmousedown="funcAltKey(event)">
<div>Press and hold ALT key and then click here.</div>
<script>
function funcAltKey(event) {
if (event.altKey) {
alert("ALT key: Pressed");
} else {
alert("ALT key: NOT Pressed");
}
}
</script>
</body>
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