JQuery Validator plugin is a JavaScript library that helps to validate forms on web pages, Through this tutorial, we will show you how to validate forms on the client side using the jQuery validator plugin.
How to Validate Form Before Submit using jQuery?
Steps to validate forms on the client side before sending the form data to the server:
Step 1: Create HTML FORM
Create an HTML file named index.html and create a form with some fields like first name, last name, email, password in the index.html file.
<!DOCTYPE html>
<html>
<head>
<style>
label,
input,
button {
border: 0;
margin-bottom: 3px;
display: block;
width: 100%;
}
.common_box_body {
padding: 15px;
border: 12px solid #28BAA2;
border-color: #28BAA2;
border-radius: 15px;
margin-top: 10px;
background: #d4edda;
}
</style>
</head>
<body>
<div class="common_box_body test">
<h2>Registration</h2>
<form action="#" name="registration" id="registration">
<label for="firstname">First Name</label>
<input type="text" name="firstname" id="firstname" placeholder="John"><br>
<label for="lastname">Last Name</label>
<input type="text" name="lastname" id="lastname" placeholder="Doe"><br>
<label for="email">Email</label>
<input type="email" name="email" id="email" placeholder="[email protected]"><br>
<label for="password">Password</label>
<input type="password" name="password" id="password" placeholder=""><br>
<input name="submit" type="submit" id="submit" class="submit" value="Submit">
</form>
</div>
</body>
</html>
Step 2: Add the jQuery Validation Plugin
To add jQuery validation plugin cdn file in index.html file:
<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.19.0/jquery.validate.js"></script>Step 3: Write jQuery Validation Rule
Writing validation rules with the help of jQuery validate() function for form fields to validate form data before submitting:
<script>
$(document).ready(function(){
$("#registration").validate({
// Specify validation rules
rules: {
firstname: "required",
lastname: "required",
email: {
required: true,
email: true
},
password: {
required: true,
minlength: 5
}
},
});
});
</script>
