It is an event that triggers when the mouse pointer moves out of an element.
Example
You can try to run the following code to learn how to work with onmouseout event in JavaScript −
<html>
<head>
<script>
<!--
function sayHello() {
alert("Mouse Out")
}
//-->
</script>
</head>
<body>
<p onmouseout = "sayHello()">This is demo text for mouseover event.</p>
</body>
</html>