jQuery CheckValidity - Javascript

jQuery CheckValidity is a plugin for adding form validation to your web applications using jQuery. It performs client-side validation on various form elements such as text, email, number, URL, checkbox, and radio buttons to ensure that they are valid before submitting to the server.

Features

• Lightweight: The plugin is small in size (only ~2KB gzipped) and doesn't require any external dependencies
• Easy to use: Simply include the JS file, and call the checkValidity() method on your form element.
• Customizable: You can customize the error messages and validation rules based on your needs.

How to Use

Including the Plugin

To use the jQuery CheckValidity plugin, first include the jQuery library and then add jquery.checkvalidity.min.js to your HTML file.

<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script src="jquery.checkvalidity.min.js"></script>

Applying Validation to Your Form

To apply validation to your form, add the data-validate attribute to each input field you want to validate. You can also set custom error messages by using the data-message attribute.

<form>
  <label for="name">Name:</label>
  <input type="text" id="name" name="name" data-validate="required" data-message="Please enter your name">
  
  <label for="email">Email:</label>
  <input type="email" id="email" name="email" data-validate="required,email" data-message="Please enter a valid email address">
  
  <button type="submit">Submit</button>
</form>

In the above example, the name input field is required and the email input field should be a valid email address.

Initializing the Plugin

Once you have applied the validation rules to your form, you can initialize the plugin by calling the checkValidity() method on your form element.

$(document).ready(function(){
  $('form').checkValidity();
});

Handling Form Submission

By default, the plugin prevents form submission if any of the validation rules fail. You can handle form submission with valid data by using the form.submit() method.

$(document).ready(function(){
  $('form').checkValidity({
    submitHandler: function(form) {
      // Handle form submission
      form.submit();
    }
  });
});

Conclusion

jQuery CheckValidity is an easy-to-use, customizable plugin for form validation in your web applications. It performs client-side validation on various form elements to ensure that they are valid before submitting to the server. Try it out, and let us know how it worked!