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How to Check If an Input Field is Empty Using jQuery

Topic: JavaScript / jQueryPrev|Next

Answer: Use the jQuery val() Method

You can use the val() method to test or check if inputs are empty in jQuery.

The following example will add a red outline around the inputs if it is focused but not filled out.

<!DOCTYPE html>
<html lang="en">
<head>
<title>Check If Inputs are Empty using jQuery</title>
<style>
    .error{
        outline: 1px solid red;
    }    
</style>
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script>
$(document).ready(function(){
    $('#myForm input[type="text"]').blur(function(){
        if(!$(this).val()){
            $(this).addClass("error");
        } else{
            $(this).removeClass("error");
        }
    });
});
</script>
</head>
<body>
    <form id="myForm">
        <p><label>First Name: <input type="text"></label></p>
        <p><label>Last Name: <input type="text"></label></p>
        <p><label>Email Address: <input type="text"></label></p>
    </form>
</body>
</html>

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