Definition and Usage
The blur event occurs when an element loses focus.
The blur() method triggers the blur event, or attaches a function to run when a blur event occurs.
HTML Code
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$("input").blur(function(){
alert("This input field has lost its focus.");
});
});
</script>
</head>
<body>
Enter your name: <input type="text">
<p>Write something in the input field, and then click outside the field to lose focus (blur).</p>
</body>
</html>
