The onmouseenter event triggers when after the mouse hover is moved out.
Example
You can try to run the following code to learn how to work with an onmouseleave event in JavaScript −
<html>
<head>
<script>
<!--
function sayHello() {
alert("Mouse Leave")
}
//-->
</script>
</head>
<body>
<p onmouseleave = "sayHello()">This is demo text for mouseleave event.</p>
</body>
</html>